Do you want to keep your reservoir topped up without hassle?
Don't want to buy an expensive float valve?

Make your own!

I have been building a hydroponics garden, and I wanted to make sure my reservoir doesn't run dry and destroy my pump (or kill my plants), but a side entry float valve would have cost me $30+ at the local hardware store, and I had already spent my budget on pipes and plants.

So, calling on my childhood obsession over MacGyver, I looked for what I had lying around, and built a cheap and surprisingly effective float valve! (effectively for free!)

Step 1: Disassemble

Start with opening up the sprayer.

If you look at the spray end, you should notice it looks like an inverse nut.
Push your pliers into the corners, and turn like a screw, it isn't hard to get undone.

When you have the front off, unscrew the small plastic nut from the other end, and slide out the innards.
just use a ball cock from a trough
<em><strong>Wouldn't a valve from the toilet system be just as good?</strong></em><br/>
Yep, except that would cost money, I had the hose attachment come with the hose I used for the system, so it was basically free! Also you need to get a specific toilet float valve, one that fills from the side, instead of the more common filling from the bottom.
Killer idea and execution. I just build an auto top off using a toilet ballcock kit. It works well but is very slow to fill. I wish i had found this first. I'm gonna build it any way. Thanks!
The purpose of this is a bit confusing to me. Why not just use a larger bucket? I had a similar setup with a 18 gal. Rubbermaid container for the reservoir. I like your solution for the screens. That was the one problem I had was that the roots clogged the hose and flooded the top tube and dried out all the others. Killed the whole crop. Great instructable!
Excellent idea, good instructable. Nice and clear pictures. McGyver would be proud of you !
As a kid, I believe that was my dream =D<br/>
nifty indeed...i've seen people use toilet parts for this kind of thing...which are easy to acquire
Ahh, at my local hardware store they wanted $30 for the float valve, this was free!
I saw that in your other instructable and didn't "get it", now I do, cool idea.

About This Instructable


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Bio: Software engineer, using electronics and micro controllers as a hobby to keep me sane!
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