Barrel in Chamber, Gun #4

[JET47]

hey man, i spent a long time in the forums trying to get how piston guns worked, sorry if i didnt realize the pilot area had to be that that small lol.

ya ima have to redo that whole back peice i think. i don't know if the unscewable part is really worth it, since the different inside diameter makes me have to make the piston weird, i didn't mention that before.

i think ill extend the back of the chamber a little bit for the piston, and stick a 4"-1" bushing assembly on to save the ball valve, and mount the schrader valve somewhere in there. pity i dont have the threading tools down here >.<

i would have gone with the sprinkler valve in the first place, it looked the easiest, cept i don't think i could get one down here, im in the virgin islands, alot of places don't like to ship to us =( so i went for the piston instead

[elitesniper]

Its a good thing you went with a piston, they have way more power then a sprinkler would ever have

[fireman565]

I think Starman was talking about using the sprinkler valve for the pilot valve, not the actual main valve, which would be a big improvement, if you could get one. Home Depot should carry them.

Lose the "Y". You don't need it. If you have a threader, thread the schrader into the pipe just behind the "new" bushing you need to replace the dwv reducer.. I couldn't find a 4" to 1" bushing, so I went with a 4" - 2" bushing, then a 2" - 1" bushing, piloting with a 1" sprinkler valve modded.

I tried the "threaded" approach to accessing the piston for maintainence. I couldn't get it to seal like I wanted. I instead went to a slip bushing. I just glued a section of pipe into the back of the tee which housed my piston. I then bolted it on with four small bolts with sealant. All I have to do is take the bolts out, and slip off the bushing/pilot valve for access.

[elitesniper]

He said he wished he had a threader.

[Lentamentalisk]

still you can just drill a hole in then put on lots of epoxy... thats what I did and I haven't been shot with a supersonic schrader valve... yet...

edit: I gotz me red starz!!!

[elitesniper]

Gahh, when screws or threaded shraders pop out it wont even be strong, there is so little surface area for the air to act on.

[Lentamentalisk]

exactly why it is safe to epoxy in the valve in the first place, there is only around 1/10 to 1/20 of you psi in pounds of force pushing on it, so the glue doesnt even have to be that strong to stay in

[MrCrowley]

I didn't write <A HREF="http://www.spudfiles.com/spud_wiki/inde ... C">this</a> for no reason

It's about identifying DWV btw 8)

[starman]

I think Starman was talking about using the sprinkler valve for the pilot valve, not the actual main valve, which would be a big improvement, if you could get one. Home Depot should carry them.

Yes I was talking about replacing the PVC ball valve pilot in the rear with a sprinkler valve. You're on the right track going with a piston, just be prepared to fiddle with it some to get it right.

[elitesniper]

Mr.C you should send that to every new member who joins, so we wouldn't have so many post about is this dwv?, OMG I I USED DWV!!, and so on.

[MrCrowley]

I know eh, I need to distribute that thing. Wish I had that when I started out...


Back in my day.... We didn't have nuthin'. We had to learn it the hard way, this new generation is so spoilt they don't even realise...

I just wish school study was as fun as spud study

[elitesniper]

Spudgun University what a dream

[starman]

He said he wished he had a threader.

Surely they have a 7/16 drill bit and a 1/4" NTP tap available somewhere there. Not at the corner drugstore but it isn't plutonium either.

I could see sprinkler valves being irrelevant there...mucho grande rainfall in the caribbean...

[fireman565]

He said he wished he had a threader.

Second image.... "IMG_0512 Medium Web view.jpg
Description: back end. schrader valve is screwed directly into the pvc (used a threading tool) with teflon tape

still you can just drill a hole in then put on lots of epoxy... thats what I did and I haven't been shot with a supersonic schrader valve... yet...

LOL... It's just the image of a schrader buried up in my forehead.. is the reason I either place a nut on the inside of the chamber, or epoxy it in...

[JET47]

Ok,
remade the whole pilot end and plugged the piston, and it still wont seal >.<

pictures attached.

ive tried it with a nice bicycle pump and a 125psi compressor, no dice.