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Modded Sprinkler Problem.

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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Modded Sprinkler Problem.

Unread postAuthor: P.v.c.F.t.w. » Thu Apr 10, 2008 5:39 pm

I recently bought my first sprinkler valve for modification. After following all the instructions in the BC Pneumatics Video, my valve continues to let all the air out through the barrel when being charged. I realize there is a post for these problems already, but when I went through the process of cleaning the diaphragm and greasing it, it didn't help. I also removed that little white piece stuck in the diaphragm so that the airflow was not constricted. That didn't help at all, except for this: When I put my hand over the barrel end to seal the air off, and i squeeze the blowgun trigger, it releases the pressure through the blowgun, whereas when the white piece was still there it did not.

If anyone can help me with this, that would be awesome. Also, if there is another post that explains this to me, or if I am posting in the wrong place, kindly let me know.

Thanks.
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Unread postAuthor: jrrdw » Thu Apr 10, 2008 5:54 pm

It's in the Wiki under 'Modding a sprinkler valve'. The button at the top of the page that says wiki.
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Unread postAuthor: Maniac » Thu Apr 10, 2008 7:06 pm

Can you post some pics of it.
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Unread postAuthor: JDP12 » Thu Apr 10, 2008 7:11 pm

I've had that problem a lot with sprinkler's, I ordered a modded one, it was leaking through the barrel, ordered another modded one, and it leaked through the barrel also. don't know if the pressure wasn't high enough, but once i took it to 100 psi or so it seemed to stop. I dunno, I haven't been doing much testing. I've decided not to use them again.
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Unread postAuthor: P.v.c.F.t.w. » Thu Apr 10, 2008 8:12 pm

Jrrdw- I know, it's just that since it has been modded it doesn't seal.

Maniac- Unfortunately my camera isn't working at the moment, but it essentially looks just like every other modded sprinkler. It is an Orbit Watermaster 3/4", with threaded female ends.

Ilovetoblowthingsup- *Sigh* That is not what I wanted to hear. I was sort of wishing someone would pat me on the back and everything would be o.k. again. >.< Also, I wanted to say that my valve isn't just leaking, it's spewing air out the barrel. Absolutely none of it is caught by the valve, and it accumulates 0 P.s.i.
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Unread postAuthor: bigbob12345 » Thu Apr 10, 2008 8:27 pm

It doesnt leak out of the barrel for me
And i have the exact same valve

is it the wrong way around?
Check the arrow on it to make sure
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Unread postAuthor: brogdenlaxmiddie » Thu Apr 10, 2008 8:28 pm

I was having the same problem. I took out my blowgun, cleaned it greased it, and then epoxyed the damn thing in :D Epoxy+leak= no leak
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Unread postAuthor: P.v.c.F.t.w. » Thu Apr 10, 2008 8:33 pm

Bigbob12345- No, it's the correct way

Brogdenlaxmiddie- The problem seems to have nothing to do with the blowgun for me.
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Unread postAuthor: elitesniper » Thu Apr 10, 2008 8:36 pm

is your noid bleed switch off?
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Unread postAuthor: P.v.c.F.t.w. » Thu Apr 10, 2008 9:01 pm

Elitesniper- Yep, made sure of that, too.
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Unread postAuthor: Davidvaini » Thu Apr 10, 2008 9:14 pm

try this...

Remove the little black piece on the diaphram, if that doesn't work then try drilling where the whole is when you remove that little black piece.
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Unread postAuthor: bigbob12345 » Thu Apr 10, 2008 9:14 pm

Maybe the sprinkler is just defective
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Unread postAuthor: P.v.c.F.t.w. » Thu Apr 10, 2008 9:19 pm

Davidvaini- Did that already, the little piece that moderates airflow into the area above the diaphragm, right?

Bigbob12345- I'm thinking that may be the case, that the diaphragm must just be defective because I've taken just about every measure to fix it.
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Unread postAuthor: Hydra » Fri Apr 11, 2008 3:36 am

In the outlet(barrel) there might be a small tube protruding out. Seal that tube with epoxy because it releases bleed air from the solenoid or something, but since there is no solenoid it doesnt work and air leaks out.
So seal that little tube in the outlet.
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Unread postAuthor: dongfang » Fri Apr 11, 2008 6:03 am

Hi,

I also had a few challenges with my first sprinkler.

I'd say:

- Don't listen too much to those ideas about drilling a larger hole in the diaphragm. It will only make the valve harder to trigger and less efficient when you get it to seal.

- Since you removed the little plastic plug in the diphragm hole anyway, try to fill it from the pilot side. That will give the diaphragm a little push in the sealing direction when filling, just what you want.

- If you removed a spring (for the same "push"), put it back in.

Regards
Soren
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