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Check valves

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Check valves

Unread postAuthor: origin unknown » Sat Apr 28, 2007 7:45 pm

Does anyone know if they sell 1/4" check valves at Lowes, Home Depot, or Ace Hardware? I just don't want to order one online, i just wanna pick it up at the store.
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Unread postAuthor: keep_it_real » Sat Apr 28, 2007 7:49 pm

I just figured this out. A presta valve is a check valve and its really cheap (free). I know Home Depot sells brass check valves that are like 10 each but I'm not sure what size. I'd guess half inch.
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Unread postAuthor: origin unknown » Sat Apr 28, 2007 7:51 pm

Ya, i went to home depot today and all i saw were the 1/2" and up check valves, and they were the swinging kind, not the spring piston ones. How much pressure can Presta valves hold, and are they usually 1/4" threaded?
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Unread postAuthor: keep_it_real » Sat Apr 28, 2007 8:15 pm

No there not 1/4". I don't even think they're 1/8". It's some other size. If it's any help, I know they fit inside 1/8" braided vinyl tubing. I think someone else on this forum said they took presta valves up to 200 psi. I now for sure 120 psi is fine.
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Unread postAuthor: origin unknown » Sat Apr 28, 2007 8:24 pm

i might can use the check valve in my cheap bike pump which i dont use. for some reason it has a small check valve on it, and it fits right onto a schrader.
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Unread postAuthor: noname » Sat Apr 28, 2007 8:30 pm

A schrader is a check valve, you get them 1/4" or 1/8" threaded.
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Unread postAuthor: origin unknown » Sat Apr 28, 2007 8:32 pm

I need it to where when you take it off the pump, it doesnt leak air. This is very critical to my design, so it doesn't accidentally trigger my valve which is very sensitive to pressure change.
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