Easy stirrup pump

[john bunsenburner]

Ask the gas dealer in your area, mine has anything from tubing for 10 000++ psi to really good valves for the tanky, im not sure about sharders but it could be ordered from there i guess.

[Floyd]

Thanks, but I was looking more for a website, mainly for the chuck, if you can order hose from the same place thats just a little bonus.

[john bunsenburner]

oh ok sorry then, if you find something let me know, I guess internet is cheeper than gas dealer...

[Gippeto]

Something like this?

http://www.aircraftspruce.com/catalog/l ... seneck.php

Schrader USA Part# 6116

Rated to 3000psi.

[Floyd]

Yes, that is what I was looking for.

It just screws on to the valve right?

Edit: How does it connect to the hose?

[Gippeto]

The fitting has 1/8" fnpt on the other end.

[spudtyrrant]

well i built the pump thanks to gippeto's how-to and man does it work.

I followed all the steps except instead of using a drill press i used a bench grinder and a hand drill spinning in opposite directions and instead of fiberglass resin i pack epoxy putty in the tube around the all thread with the end of a bolt.

i was asked to post this to show how easy it really is. If i can do it the you can do it

here she is :
the whole pump:

pumping p.o.v.

fitting on the bottom of the pump(i made it bigger so i would have somewhere to place my foot)

gauge at 415psi(told you it really works lol i let i sit over night at 400 and it didn't drop at all)

[Gippeto]

Nicely done!

I would suggest going to a steel handle in light of Far Cry's incident where the (plastic) pump handle broke, allowing the pump shaft to pierce his hand.

The pvc handle on my pump has not given trouble, it's just for an added safety factor.

I've changed mine already.

I think I'll add a note to that effect at the beginning as well.

[spudtyrrant]

Nicely done!

I would suggest going to a steel handle in light of Far Cry's incident where the (plastic) pump handle broke, allowing the pump shaft to pierce his hand.

The pvc handle on my pump has not given trouble, it's just for an added safety factor.

I've changed mine already.

I think I'll add a note to that effect at the beginning as well.

its filled with epoxy gippeto i remembered farcry's incident and didn't want the same to happen to me. i will change to an aluminum pump handle soon i have some 1 inch aluminum stock lying around but for the moment it seems to be holding up pretty well.

[alex_esa]

Good job, do you have a picture of your finished piston?

Where did you have used the 1/2" washer?

Thanks.

[Gippeto]

It's been awhile... I think the 1/2" washer was used as the base to support the molding tube when pouring the piston body.

[LovableAirGuns]

hey would I be able to use hot glue instead of low viscosity epoxy for the piston?

[saefroch]

Possibly, at very low pressures. If possible, go with an all-metal construction, like I did here. I'll be updating the thread to reflect the changes I've made to the pump, hopefully soon.

Updated

[Gippeto]

I highly doubt that hot glue would last long enough to make it worth the trouble. Use the epoxy (which is still good in my pump)...or all metal as suggested.

[mark.f]

I think what a lot of people don't realize is the amount of heat generated at the bottom of the pump. A hot glue piston would probably melt before too long.

I used epoxy in version one of my pump to stop the pump head from exiting the bottom of the copper tubing, and it melted into sticky flake during the first couple of uses. I eventually just lengthened the piston at the bottom to do the same thing.