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Mounting schrader to endcap

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Mounting schrader to endcap

Unread postAuthor: crcowboyfan » Tue Feb 28, 2006 9:36 pm

What is the best way to go about mounting a schrader valve to an endcap? The valve I got is unthreaded and just has a round fat rubber ball at the end. Should I just drill a hole the same diameter, pull the valve through, and then epoxy it on?

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Unread postAuthor: cardinals08 » Tue Feb 28, 2006 10:04 pm

That is what I would do, I'm not sure if it is the best way to go about it though.
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Unread postAuthor: Shrimphead » Wed Mar 01, 2006 12:26 am

I think that it just pops in and makes it's own seal. Does it have little rings on the ball end? Because if it does, the you don't need to epoxy it (as long as you drill the hole the right size.)
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Unread postAuthor: TfAv1228 » Wed Mar 01, 2006 1:10 am

with that kind you just have to get the hole the correct size, but it is still really not safe. Instead, use an Air Tank Valve(A threaded shrader you have a tire valve) and some bushings to get down to 1/8" then just stick on some teflon tape and screw it in much safer and easy to replace for maybe a different fitting besides a shrader like switching between a shrader and a compressors quick disconnect.
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Unread postAuthor: Shrimphead » Wed Mar 01, 2006 7:20 pm

Ya, but it also costs more to reduce it down so far. If you are going to use a threaded one, just find a place on your chamber where a fitting overlaps the pipe, drill a hole, then drill threads into it, then put some teflon tape on and you're good.
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Unread postAuthor: TfAv1228 » Wed Mar 01, 2006 7:38 pm

it cost me about 50 cents to go from 1-1/2" to 1/2" threaded with 1 flush bushing and then i got a brass fitting for about 4 bucks bringing it down to 1/8" and i can remove that and screw it in to any gun i want to use at the moment
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Unread postAuthor: Shrimphead » Wed Mar 01, 2006 7:50 pm

Ok, that setup sounds like it works great Tfav, but he might just want to stay with the valve he has already.
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Unread postAuthor: Hatheg-Kla » Thu Mar 02, 2006 1:39 pm

so assumeing you had metal threads on it the pvc is strong enough to just screw it in to? meaning making your own threads. I'm about to install one as soon as I can find a good valve and I don't want it to fly off and go through my skull.
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Unread postAuthor: Shrimphead » Thu Mar 02, 2006 6:23 pm

You have to drill your own treads into the pvc. The best way to do it would be to get a tap the size of the shrader. But most people don't have many taps (I think they are expensive). I think you might be able to just put something the same size and with the same threads as the shrader into your drill chuck and slowly turn it into a pre-drilled hole. I don't know if that will work though, so wait for someone else to say if it will or not.
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Unread postAuthor: boilingleadbath » Thu Mar 02, 2006 10:07 pm

Yes, Hatheg-Kla, using the threads on the part works - I think it does anyway, considering it's outlined in the "modding a sprinkler valve" thread.
I'v never acctualy done the method outlined there, although I once did tap with a 3/8" plug heated very hot by placing it directly on the stove...
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Unread postAuthor: The High Plainsman » Thu Mar 02, 2006 10:43 pm

I have used valves identical to that on 2 guns to date, I cant recall how large the hole is drilled, but it is definitly a lot smaller than the fat end of the valve, and you just pull it through with a pair of needle nosed pliers (you have to tug pretty hard at it). whatever you do, do not drill the hole the same size as the part that will sit in the hole and do not use any epoxy afterwards as it will just chip off and look bad.


I like them better than the metal variety because in the event of a failure, they resemble a bullet a little less, and there is no way that whole end is going through the hole.

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It has been in there for 2 years and has had sucessful tests at upwards of 150 psi.
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Unread postAuthor: TfAv1228 » Thu Mar 02, 2006 11:00 pm

Hatheg-Kla wrote:so assumeing you had metal threads on it the pvc is strong enough to just screw it in to? meaning making your own threads. I'm about to install one as soon as I can find a good valve and I don't want it to fly off and go through my skull.
I wouldnt just screw into the pvc I would use bushing to bring th size down to 1/8" 1 thats pvc down to 1/2" and one thats brass from 1/2" to 1/8" should do it
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