Air pump

Does anybody know how to make a air pump for an aquarium?? I need it for a Humidifier.

Posted by kris142 10 years ago


suction pump?

How can I use http://www.fazzini.it suction pump in the most simpler end effective way?

Asked by vagatont 4 years ago  |  last reply 4 years ago


Coil Pump

Morning, all. We've just completed a quick proof of concept for a hand-powered coil pump. The pump lifted water through 3.1 meters of vertical height. Take a look at https://www.instructables.com/id/Coil-Pump/ comments and ideas for development appreciated Thanks!

Posted by chuangt2u 7 years ago  |  last reply 7 years ago


EMF Pump

Can I use a sphere magnet when building an EMF PUMP? Glued onto the pulley. Thanks

Posted by papster 7 years ago  |  last reply 7 years ago


Air Pump

Does anybody know how to make an air pump for a aquarium out of stuff laying around your house?

Posted by kris142 10 years ago  |  last reply 6 years ago


water pump

I have a very strong 18v motor from an expensive cordless drill(clutch went out). I also am in need of a pump to drive some misters, 20+ PSI. Is there a pump I can make or buy to be driven by my motor?

Posted by geckoguykc 8 years ago  |  last reply 8 years ago


Heat Pump

Has anyone attempted building a homemade heat pump?  Maybe one used as a hot water heater only? What are the challenges that prevent a DIYer from building one from scratch?

Posted by krichmond0306 7 years ago  |  last reply 6 years ago


Homemade breast pump / milk pump?

Hello i want to induce lactation and I cant find good a breast pump at the right price does anyone have any idea how to build one please let me know I dont need an electrical one it could be manual does anyone have an idea what to use for the suction cups on the breasts? thank you

Asked by slamincat 8 years ago  |  last reply 8 years ago


small vacuum pump

Where can i purchase a replacement vacuum pump for a rival vacuum sealer vs230

Posted by derricklaw 2 years ago  |  last reply 2 years ago


Automatic water pump?

Hello, I was wondering how I would make an automatic pump, that pumps OUT water, just something like, checks to see if water level is too high then starts pump, something simple and effective. Anyone have an idea?

Asked by rub3n 7 years ago  |  last reply 7 years ago


repair a tire pump? Answered

Hand pump offers little to no resistance when pumping. loss of seal inside the pump cylinder.

Asked by 10 years ago  |  last reply 10 years ago


Will this water pump work? Answered

 It is tought to be a wind-powered water pump and i wonder if the desing would work. I hope the picture is understandable.

Asked by EdSe1991 8 years ago  |  last reply 7 years ago


mixer grinder pump

Our water tank is on the roof, so the tap there doesn't have much pressure to water mom's plants on our roof with a pipe. So i need to make a pump. We have an old mixer grinder set with all its jars. But i'm not sure how to make a pump into a jar. limitations: 1) Can't cut holes in the metal parts of the jars, no equiments. only the top is plastic 2) 3D printer/ cnc or any thing of that sort is not available

Posted by Tj77 4 years ago  |  last reply 4 years ago


Pumping Water in the Arctic!

As a small background to the project I am working on: I am currently doing my Masters of Architecture in Copenhagen, and we are designing devices to bring on our expedition to the North Pole, and I am harnessing salt water to pump through salt water batteries. My question is then: What kind of pump do I need to pump water up 2 meters? I don't need much water coming up at once, just needs to be constant. I am also looking for the most energy efficient way of doing this, any know of something? Any help is much appreciated! :) Thanks, AD

Posted by arctic_devices 4 years ago  |  last reply 4 years ago


water pump idea

I hypothesise that when is heat applied to a suitable sealed vessel, filled with water, and having a pipe into the base of the container below the water level, that when the water gets hot enough, it will exit the pipe under pressure. if anyone has any input or had experiance with this kind of a thing or knows of a device which works in the same or similar manner, i would like to hear from you.  i though it could be a way of moving water with no moving parts or access to electricity, motors etc. thank Kim.C.S.B

Posted by QSDR 5 years ago  |  last reply 5 years ago


Food safe pump

Hi everyone! I'm working on a halloween costume where I want to have a container of liquid on my back, a hose from said container running down my left arm and a way todispense the liquid through the hose. Right now the dispensing is the problem. Would a windshield washer pump be reasonably safe to use for something that is going to be consumed? I'd buy a new unused one of course. If that's not a good idea, what would be? I've experimented with a can of compressed air to push the drink out but was not fully satisfied with the result.

Posted by Jur 5 years ago  |  last reply 5 years ago


Bike pump problem?

I was using my bike pump today to fill a pneumatic launcher, and finally I just got fed up with the leaking around the pump base. On every stroke, the first 3/4 of air would be leaked out of the base, and it would only compress the remaining 1/4 of air remaining, and that would only compress if you pushed down very hard, and quickly, otherwise it all leaked out. And no matter what pressure the launcher was pressureized to, the pump handle/piston would slide down slowly, getting pushed down under it's own weight, meaning that there was almost no resistance to it. I think the leak is occuring where the tube meets the pump base, and you can feel air rush out with your legs as you pump. I'm pretty sure there is a one way valve in the gauge portion of the pump, which connects to the base with a hose,  and the filling hose is coming out of it, which is allowing me to compress at least a little air before the rest leaks out. I disassembled  the pump, starting with the base. Turns out, the leak was from an oring on the tube which was not tightened down enough by a screw on ring around the base of the tube. Put it back together, and voila, pushing my finger against the schrader valve connector and pushing down on the pump handle created pressure against my finger and no leaking. As soon as I hooked it up to my launcher, i realized something was up, I could pump down once, but the pump handle just got pushed upwards as soon as i let go. This is what I can't figure out how to fix. It seems the one way valve in the gauge portion is locked in the open position. Anybody know how to fix this? EDIT: Okay I took pictures of the pieces. I now cannot figure out if the valve is in the base, or the gauge portion, so i have included pics of both. Hopefully someone can help me figure this out. EDIT 2: Turns out the valve is in the base, and the ball just fell out when i first disassembled it, i have now found the ball and it is working fine.

Asked by LiquidLightning 7 years ago  |  last reply 7 years ago


Vacuum pump voltage?

Today I was dumpster diving and i found an old vacuum so i decided to take the pump out but i made the mistake of not checking what voltage the vacuum runs on, because it also had a spinning component at the mouth of the vacuum. I think the pump works fine because i noticed that tube connecting the mouth of the vacuum and the pump was broke. Is there anyway to find out what voltage it runs on? would standard 120 be ok?The markings on it say 81 b-9 ECP 6500-240 HPU+ 60hz HD10 120 vac 07:07 does that mean it will work off a standard 120 outlet?update: What I am going to do with this motor has been decided. I will be attaching it to the back wheel of my bike with a car battery, i will install some type of switch on the handlebar or add something like a dimmer switch, this would allow me to have the motor on if i want, and i can adjust the speed. Please help fine tune this idea.

Posted by astrozombies138 10 years ago  |  last reply 7 years ago


Manual Water Pump

I am trying to build a manual water pump in my house. We are digging a well of about 320 feet (about 100m) and are hoping to pump water into an overhead tank that is about 13ft (4m) above the ground. Can anyone help me figure out how to build such a pump. Electricity is and expensive commodity in my area and that is why were looking to use a manual pump. Any input will be appreciated.

Posted by oppan_d 7 years ago  |  last reply 5 years ago


Advice on A centrifugal pump.

Hello, I recently was given a pet from a friend and after doing some research on what the little guy needs I came to the understanding that the current enclosure he is in is inadequate for his needs. Therefore, I wanted to save up some cash to get him the right size tank set up that I know he deserves. In the meantime though, I have plenty of things laying around the house that I feel could render him a more comfortable habitat till that investment goes through. After more research on the matter, I came to find that for most household aquariums, the bulk of the work falls on your filtration system. That being said, I wanted to go for a Wet / Dry Sump Filter setup as it would be  the most easiest system to setup at home with the various resources laying about. Unfortunately while gravity will be doing the work of siphoning the water from the tank down to the Wet / Dry Filter Media, it will not be moving it back up to the tank. For that I concluded there was no escaping the need of a pump in some shape or form to move that cleaner water back into the tank. From what I read the pump will pretty much determine how big I can make his tank.  So this brings me to my current dilemma. Presented with various motors around the house, I went for the biggest I could find (* excluding the water pumps in our cars mind you). That so happen to be a 1.25 HP Wet & Dry Shop vac that was collecting dust in the garage. I confirmed the motor is working and already came with the impeller attached to it. I was hoping to see if you fine folks could share some wisdom on how I can: 1.) Make it Waterproof. 2.) Adhere the right type of casing around the Impeller and Motor so as to benefit from the  Bernoulli's principle and get the most water moving through my system.  3.) I intend to have this setup not 15~20 feet from where I sleep, this motor is LOUD. I was reading online about creating a sound damping box for it and was wondering what suggestions you guys might have for that? I keep fearing there won't be enough ventilation and it will over heat. ....anything else you would like to throw in. TL;DR : 

Posted by Rensouken 8 years ago  |  last reply 8 years ago


High pressure pump

Does anybody know how to build or get a pump that costs maybe like $20 that will pump to at least 400 psi?

Posted by waterrocketexpert 4 years ago  |  last reply 4 years ago


Pumps n stuff

So I have this project and I need a rather large set of pumps.Ideally I’m looking for peristaltic pumps, but a normal one will work too. 600ml/min+ (ideally 1500+). Also I’m looking for solenoids. I can find them for around 5 each but this is way to expensive. Where can I find this stuff cheaper.

Asked by CamdenS5 2 months ago


Pneumatic cannon no pumping?

I wanted to build a soda shooting fridge canon like this  http://www.youtube.com/personalbeerrobot#p/u/3/TVyLuosZ1rY but I don't understand how the cannon in question works. All pneumatic cannons I have dealt with have required pumping, but this one appears not to require pumping. How does it work?

Asked by KarateLover21 7 years ago  |  last reply 7 years ago


vacuum pump wanted

Hoping someone would have a vacuum pump (manual or electric) they wouldn't mind giving me, hoping to make a vacuum cannon but missing a quite essential part ha ha

Posted by ToggleSwitch 3 years ago  |  last reply 3 years ago


Circulating pump with thermostat

I have a 1550 gallon water holding tank and plumbing in an outshed in Fairbanks, Alaska. The pump and pressure tank are also in the outshed heated with an electric heater. To save energy I'm thinking to install a circulating pump inside the tank that circulates through the plumbing inside the outshed to keep it from freezing but not necessarily to the portion of water pipe going under ground to the crawlspace of the house. It should also have a thermostat to start heating when the temp of the water gets to 32 degrees or so. Is there any such thing and if so, how would it be installed? Thanks!

Asked by icicle46 7 years ago  |  last reply 7 years ago


Water Pump Sprinkler

I have a gas powered water pump at the creek for watering a garden and grass. I need a suggestion for building a 'sprinkler head' on the end of the 3" blue collapsable tubing. I have been having to move the water every 15-20 minutes. Thought of using a 3" pvc tube with holes drilled along one side and capping the other end. Any other suggestions? Thanks, Bill

Posted by willthon 9 years ago  |  last reply 8 years ago


Wanted intructable - "Convert an Aquarium Air Pump into a Vacuum Pump"

Hey all - Wanted intructable: "Convert an Aquarium Air Pump into a Vacuum Pump" I know this is pretty simple - probably... as well to add to that a mod... "Convert a Aquarium Air Pump into an Adjustable Vacuum Pump" I'm trying to build something else and would like to see how this is done - i have one shot at one Aquarium air pump and don't want to mess it up. Plus i'd like to know how to regulate the vacuum  - make it with adjustable vacuum pressure if possible - if i even really need to or at least regulate the vacuum pressure so it is not too much if it is after built. I'm sure i could do a google and find all the parts - thinik tank it out and build it... but if you know already how to do it - makes things a tad easier for me. The instrucable even easier to avoid mistakes. thanx - chase -

Posted by -chase- 9 years ago  |  last reply 8 years ago


What can I use to pump a good amount of air through a tube? Answered

I am making a shoe drying rack and I need something that can pump a decent amount of air through a 1/2 inch tube. Does anyone have suggestions on what I can use and how I can hook this up?

Asked by sblaptopman 7 years ago  |  last reply 7 years ago


How to make pump for a waterfall ( height approx. 10cm) and water depth approx 2cm for an aquarium.

I have this aquarium 60x30x30 cm. I wish to setup a waterfall in the aquarium. Now the depth of water in the aquarium is to be approx. 2cm and the height of waterfall is to be approx 10cm.  I am looking for a pump design which could work comfortably in that water depth.

Asked by adeshwal 6 years ago  |  last reply 6 years ago


any one with an idea of a simple to construct well water pump(30ft) and with head pressure for a savonious turbine?

I live in a remote area where electricity is not there and sometimes we do experience long dry spells. during the dry spells, wind is present although not too strong. i want to use this wind power with savonious turbine to irrigate a nearby one acre plot. water is 30ft and below.

Asked by Hezz 9 years ago  |  last reply 9 years ago


inflating and deflating a air bladder continuously?

I am interested in a project however what i need to do is to inflate and deflate a air bladder repeatedly on a continuous cycle (so inflation and the deflation). This making me think of a piston style pump hooked up to a motor which I can control through use of a variable resistor. Is there any piston style pump i can use or is there a alternative which would be better. (I do have a budget of around 70usd)

Asked by mute86 6 years ago  |  last reply 6 years ago


Projects to use a bilge pump?

I have a 500 gph fully submersible rule bilge pump that is not needed for anything. I've been looking around and trying to find a use for it. I feel like the possibilities are endless yet I can't think of anything. It's a 12 volt 2.5 amp pump. Any ideas?

Asked by Kirschbj 3 years ago  |  last reply 3 years ago


Will this water pump work? 2.0

I have updated my design for a simple water pump with the comments on my last one (https://www.instructables.com/answers/Will-this-water-pump-work/) in mind. It's thought to be hand- or windpowered and lift water 30-50 cm (1-2 feet i suppose). The cylinder will be about 10 cm (4 inch) across and the piston head 2 cm (1 inch) thick. The outlet is far too small in the picture.

Asked by EdSe1991 7 years ago  |  last reply 7 years ago


new knex pump action

Please try to make it off of my crude drawing. If you post an ible please give me credit or tell me if it has been done. If so post link. The way it works is when you pump it the pusher hits the top most ammo. That pushes it onto the ammo lifter. When you pump forward  that pulls the string which raises the ammo lifter. That then becomes part of the bottom of the barrel. Then you cock the gun and fire. Repeat. P.S. The scriblls on the paper are not hyroglfics they are words.

Posted by tytiger33 8 years ago  |  last reply 8 years ago


Pump for little pieces of paper

Hi, I'm going to make a display cabinet for an art project. Please see image for more info. The idea is to have a container (gray box) with ash on the back side of this cabinet, then there should be a pump (red dot) emptying this container and blowing the ash to the front true a tube (see red line) into a double glass window.  How can I create something like this? the problem is the transfering of the ash (little pieces of paper) from the back to the front.

Posted by vkranendonk 9 years ago  |  last reply 9 years ago


Pump action crossbow with a mag

Alright, I've had this idea for like forever and I finally got a working prototype yesterday. It has a pump with two prongs on the side which catch the rubber band bow as it is fired and then pulls it back. The trigger is a triangle shape so the rubber band can slide over the top, but still be caught on the back. The system has a few kinks, but mostly it just isn't that smooth. I hope to work them out and eventually be posting.

Posted by DRADIS 10 years ago  |  last reply 7 years ago


Water pump for filling balloon

Hi, Everyone. I am building a carnival game, and I need to know what kind of pump I need to pump water from a 5 gallon bucket into a balloon that is about 4 feet above the bottom of the bucket. The object of the game is to squirt water into a hole that has a pipe connected to it going into the bucket. The water than will get pumped up out of the bucket into a baloon that will end up popping from being overfilled, splashing water everywhere. I was thinking that some kind of submersible pump like this- along with a float switch to turn the pump on when some water goes in it, but I was not sure if this pump would have enough pressure to fill and pop a baloon. Thanks.

Asked by Gadgets_and_Gear 7 months ago  |  last reply 7 months ago


Air Compressor/Vacuum Pump

I have a theory: You have your supply of compressed air. You connect that by hose to one branch of a y-connector. The other branch is connected to a hose that goes into some sort of fluid that you want to move from one vessel to another. The trunk of the y is your exhaust (in theory). So now I give, say, 15 psi out of my air supply and that shoud drag my fluid out of its vessel through the y connector to the destination of my choosing. Would that work?

Posted by flagrantfouler 10 years ago  |  last reply 10 years ago


pump capacity / electrical interference

I am building a custom watercooling system in a confined space, with the pump motor close to the processor. for the pump, I intend to use a thin centrifugal pump with a centeral brushless motor based around a re-wound cd drive stator, but don't know what the power required to move enough water is, especially with small bore pipe (2 X 1/4" also, when positioning the pump, how far away should it be from the main board to avoid causing interference, as the pump is essentially a large spinning magnet with several amps going to it. I'm guessing the motor should be as far away as possible, as well as the supply cables. thanks for the help.

Posted by The Skinnerz 8 years ago  |  last reply 8 years ago


Making a centrifuge(?) to pump water? Answered

Am I right in thinking a system draws water through a closed, sealed fan (of sorts) which is rotated on a rod powered by a motor that then pushes the water through an outlet? Ive never heard of an impeller or known anymore than the name of a centrifuge so have no idea, although obviously have basic theoretics devised from reading other instructables. What I am looking to create a DIY pump for 5 litre bottles of water. First prototype, I plan to just have a dispenser where you hold a lever (as in a finger length one, as on water coolers) but then I plan to build it up with cooling and mabye building a unit where I can hook up multiple bottles for an extended, no hassle supply. Obvioulsy I intend it all to be motor powered, although If you have knowledge on a manual pump as a backup system, that would be interesting to learn about.

Asked by pyrosine 8 years ago  |  last reply 8 years ago


I Got a Vacuum Pump

I recently obtained a Vacuum pump from the school (they got it from like a barn or something where it was sitting for like 10 years, so it needed a lot of cleaning, lot of dirt). I'm not sure how strong it is, but it is powered by a 1/2 HP motor (the same motor that I got earlier, I'm just now using the Vacuum pump) and uses pullies to make the torque more around 2HP. Couple of Questions: -It works (I'm not sure how well, if you put your hand over the output and give the pulley a 1/4 rotation turn it generates a noticeable amount of sunction (and sounds like an opening bottle of wine when you take your hand off). -What usually goes bad with old pumps, can I prevent it? -I should probably change the oil, is there a cheap local way of getting some (like some sort of auto oil?) -Do you think there's enough suction to create a vacuum tube. (doesn't have to be precision made, it's for Tesla Coils, think large Vacuum Tubes)

Posted by guyfrom7up 10 years ago  |  last reply 10 years ago


Knex pump action mech? Answered

What is the knex pump action mech, I understand how to do the trigger but I cannot understand how the pump attaches onto the ram and how it stays on the body of the gun. Has anyone got a picture or an easy to build gun which doesn't use too many pieces and demonstrates the mech well, I don't care about power or reliability, I just want to understand the basic principles of the mech

Asked by I.E. 6 years ago  |  last reply 6 years ago


pumping water without electricity?

So I want to build an aquaponics system, because they're awesome, but I need a way to move water about 6' verticaly. I dont have elctricity where I want to put it, and there's not going to be. The water needs to be moved from the bottom of the fish tank, to the top of a resivoir tank. I want to buy the least amount of stuff possible for thisproject, so I could use some help:D

Posted by jakem456 8 years ago  |  last reply 1 year ago


A good deep vacuum pump? Answered

I'm looking for a vacuum pump for use with projects like the fusor included in make magazine, a laser tube, or a plasma ball.  It doesn't need to move huge amounts of air, but nothing below 1.5 lpm.  It also needs to have an ultimate vacuum of at most 25 microns.  I have been unable to locate any pumps which meet these standards, all of them have ultimate vacuums of around 100 to 75 microns or are completely unlisted.  Do any of you have some experience with these and some advice.  I don't need something for pumping out heating/cooling units daily, just a very deep vacuum a couple times a month.

Asked by jj.inc 5 years ago  |  last reply 7 months ago


air mattress pump silencer

I have a big air mattress that I use frequently, but the electric pump is so loud that the apartment neighbors complain.  It takes 3-5 minutes to inflate, which is an eternity of noise when you're setting things up at night.   I just wondered if there might be a way to dampen the sound without having to use a foot pump or just leave the mattress inflated it at all times. Any ideas, anyone? 

Posted by kennan 3 years ago  |  last reply 2 years ago


AC Pump Motor Not Working? Answered

I have just come across a free pool pump and hope I will be able to get it up and running.  So far I have had absolutely no luck with it.  The run switch seems to work and so I don't think it is the culprit.  I have even tried two newish capacitors which I know work.  When I plug it in it just hums.  It doesn't throw the breaker so I don't think a short is the problem and it isn't bound up as I can turn it easily by hand.  There is also no sign of twitching as the motor attempts to start.  The overpower protection switch seems to be good and shows continuity across all polls.  The motor itself has continuity where I believe it is necessary so I am at a loss for what could be wrong.  The motor says it is good for 115 volts as well as higher but I would prefer not to shove higher voltages through it if not necessary.  Do any of you have ideas on how I could get this up and running as the pump is in excellent condition and will be useful as a runoff booster pump.

Asked by jj.inc 4 years ago  |  last reply 4 years ago


Cleaning the oil for a vacuum pump

Was too lazy to do an Instructable about it and think a lot of pics or even videos won't help much if you know what I mean ;) Some of us use rotary vane pumps not for the purpose of evacuating refrigeration systems but for all sorts of fun and experiments. This means quite soon or often we face the problem of the oil taking in a lot of water or even worse particles and solvent fumes. I don't know about you but I was getting sick and tired of replacing the expensive oil every few weeks or sometimes even days if something got too wrong. There are many different blends of compressor oil out there that will work very well in our rotary vane pumps. The main difference is whyt the oil is designed for. Some are perfect for aircon systems, others for the work with solvent fumes and there are even those special oils that bind moisture. Unless you really need to evacuted special gases or solvents basically any low viscosity oil will do us just fine! So instead of paying 20 bucks for special compressor or even vacuum pump oil we can select the cheap everyday oil. Well, not exactly... We also want to be able to recycle our oil to save even more money. That means we don't want an oil that binds to water to keep it out of harms way. We also don't want any oil that has special coating abilities for example these oils claiming to reduce wear and tear on your engine. But any other low viscosity mineral oil or if you prefer synthetic oil will do - just stay away from silicone based oils!! If you have not used your pump for a few days you can often see a slude at the bottom of the viewing glass. If the rest of the oil is clear you can simply drain this worst bit and top up with fresh oil if required. This simple procedure saves you a lot of oil already, at least if your pump has some rest every now and then. Once your oil looks wasted it is time for the recycling and cleaning: Release the oil into a high glass jar or these facy spaghetti glasses. Fill with fresh oil and give it a short run. Release this oil as well and wait for it to properly drain. You now have the inside of your pump nice and clean again, time to fill one last time with fresh oil to keep using the pump. The filthy oil we now have in our jar should be covered with some fine cloth or filter paper and placed somewhere warm. After a week or two the oil, filth and water will have seperated and you pump, drain or siphon out the now clean oil for further use. Don't be too exact here trying to get all the oil out, just remove what you can without risking to suck in the filth from the bottom. Simply leave the rest in the jar and add the next oil change to it for the same recycling process. Solvents.... In some cases we will work with solvents and that means the oil might bind to them. Acetone for example is quite nasty here and can change the oil itself by breaking down certain components. In most cases it means the viscosity will be reduced, which is not really too bad for us. What is bad however is the fact that these solvents often refuse to fully seperate or evaporate. Once the oil looks clean do a smell test and if it smells like solvent then for sure there is solvent in it. Next step to confirm is to do a lube test. Simply place on some smooth metal or glass and smear it with your finger - a drop is enough here. If it feels sticky on the surface, gives you a rubber like feeling when sliding over the surface or is far less "slippery" than the fresh oil you also have a problem. I found that filling this contaminated oil into a proper container and applying a strong vacuum will remove all solvent residue in a very short time. Downside is that the oil in the pump is contaminated again, so it pays off to collect solvent contaminated oil seperately and once you got enough for several refills use the pump to get rid of the solvent. When done do another smear and smell test, if still smelly repeat if no longer smelly but still the same bad feeling on the surface: Discard as the oil might be broken down by the solvent.

Posted by Downunder35m 2 years ago  |  last reply 5 weeks ago


New Vacuum Pump Idea

I have a new idea about a new type of positive displacement vacuum pump.  Its of the piston variety, but instead of a one way valve which doesn't work when the pressure gets low enough, another piston is used to act as a valve switching between the vessel to be evacuated (when the main piston is pulling a vaccum) and the atmosphere (when the piston pushes the air evacuated out). This solves the one way valve problem.  Could this pull a much lower vacuum?  I need a fairly strong vacuum, but I don't want to have to build/buy a turbomolecular pump. Also, i have a metal lathe, that's why i'm going with the piston variety.

Posted by guyfrom7up 9 years ago  |  last reply 9 years ago


Fixing a leak in a bike pump

Hi All,  I have a floor bicycle pump like this (http://www.halfords.com/cycling/bike-maintenance/bike-pumps/topeak-joe-blow-sport-ii-bike-pump) which lately developed a leak in the center tube at the bottom. It is apparently caused by bad positioning while pumping air. I have located the hole which is beneath the pump and the material is plastic. It is small 1mm or smaller hole. Is there any recommendation on what type of glue should I use to fix it ? I was thinking of epoxy, but would like to know what you guys think. Thanks

Asked by YousufS2 2 years ago  |  last reply 2 years ago


Linear electric water pump?

I need to figure a way of moving fluid along a pipe without anything in the water (i.e no mechanical bits) would a coil around the pipe produce any movement?

Asked by tommo1000 7 years ago  |  last reply 7 years ago