A warm greeting to the entire community of instructables.com and his editorial staff.
We will now put this time my acking (I think you call it so) of a small hand pump for watering the plants with pesticides, turned into a pressure pump to Unclog a drain, for example of a sink, which might clog.
Of course exists on the market this type of professional pump, but this is an amateur realisation "do-it-yourself" that has a good efficacy: tried by me personally as a last resort before you call the plumber, with unloading of the sink that was completely clogged.
Result: FREE exhaust!!!!!! After just one "leaked".
I RECOMMEND TO ALL WHO MAKE THIS OBJECT OR THIS INSTRUCTABLE WILL BE INSPIRED TO ACHIEVE SOMETHING THE UTMOST CAUTION IN ALL THE NECESSARY STEPS TO CARRY OUT.
DECLINE ALL RESPONSIBILITY FOR DAMAGE TO PERSONS, ANIMALS OR PROPERTY CAUSED BY THE USE OF THIS OBJECT.
Step 1: The ball
The focal point of the realization is, in my opinion the seal, as it is the key element of the entire system.
In fact, if this seal does not present sufficient pressure tightness strong enough and snapshot that is created at the time of issue of the tube, the "RAM" that you need to remove the blockage is not effective or is insufficient.
To achieve this seal or Cap-mouth, I used a simple rubber ball bouncing ones, commonly called from our parts "magic ball" or "bouncy ball".
Holding her back with a tool adapted so as not to hurt me, I practiced at its center, with a cordless drill, a hole to insert the tube, practicing concentric holes, increasingly large down to size in order to allow the tube to fatigue and strength.
To improve the tightness I also rolled a layer of teflon tape around the pipe then I inserted into the ball.
After that I used the duct tape to reinforce mechanically the junction point.
I finally stuffed, so to say, the ball using a piece of bicycle air-chamber to create a seal even softer and adaptable to any roughness of the pipe by "attack"