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Modding A Sprinkler Valve

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Modding A Sprinkler Valve

Unread postAuthor: PCGUY » Sat Feb 26, 2005 11:23 pm

MODDING A SPRINKLER VALVE


Image Tutorial Below
Provided By - Tim Brown
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image004.jpg
Additional notes:
If your now obsolete solenoid is getting in the way you may simply scrap it, however you must fill both small holes in the solenoid port with epoxy.
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Step 6: Cutting your hose

Your next step is to cut your hose to the desired length. I have chosen to use 1/4" id by 1/2" of air hose. This is available at Mcmaster.com

After you cut your hose to the desired length you will want to insert one end into the barbed adaptor on your valve cover and the other end into a 1/4" male adaptor. Secure both ends of hose with hose clamps. Next, cover the threads of your male adaptor in Teflon tape and thread it into a blowgun rated for at least 100 PSI. You are now all set to start using your souped up sprinkler valve. Enjoy, and as always, Keep it safe…
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Once your adaptor has been threaded into your cover you may replace all parts inside your valve and screw the cover back down.
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Step 5: Threading in your fitting and putting it all back together

You will want to wrap the threaded end in Teflon tap before screwing it into your valve. If you are going to be using the same adaptor that you used to tap the hole, you will also want to cover that in Teflon tap and thread it back in. Once you have threaded your fitting back into the valve cover it should look like this:

Once your adaptor has been threaded into your cover you may replace all parts inside your valve and screw the cover back down.
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You now want to insert the hose adaptor into your drill chuck like this:

Now slowly and as straight at possible spin your adaptor into the hole. Once you have gone almost all the way, about 1/16” of threads still showing, stop. Remove the adaptor from the drill chuck and then remove the adaptor with a crescent wrench.
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Step 4: Tapping the hole

Now that your hole has been drilled you are ready to tap it for your fitting. If you are using a pipe tap simply tap the hole and move on to step 5. However if you don't have a pipe tap and are going to be threading the hole with your fitting you will need a drill and a 1/4" male barbed hose adaptor.
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This is what the top of your valve should look like after drilling the hole.
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Step 3: Drilling hole in cover

Once you have removed your cover you need to drill a hole in the center of it. You will thread a 1/4" barbed hose adaptor into this hole. You can either use a 1/4" NPT pipe tap or you can simply drill a 1/2" hole and thread it with your fitting. Make sure that the hole will not be in the way of the spring. If your valve has a guide rod, drill to the side of the cover but make sure that it isn't in the way of anything. If you plan to use a 1/4" pipe tap, instead of the 1/2" hole, drill whatever size your tap recommends.
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Step 1: Buying the correct valve

The first thing that must be done in order to soup up a sprinkler valve is to buy the valve. There is one major thing to consider when buying a valve, does it or doesn't it have a guide rod? A guide rod is a small metal bar inside the valve that guides the diaphragm. I have found two different valves that don't have guide rods and are very simple to work with and soup up. The first valve is a Rainbird 1” inline automatic sprinkler valve. The second valve, the one pictured below and through out this how to, is a Watermaster 3/4" inline automatic sprinkler valve.
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Last edited by PCGUY on Sat Jul 29, 2006 1:08 am, edited 2 times in total.
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Unread postAuthor: CS » Fri Jul 29, 2005 4:10 pm

This vavle should work shouldnt it? Second can you drill your hole for the air fitting somewhere besides the center because if i do the spring on the inside wont have any where to sit.
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Rain Bird CP-100
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Unread postAuthor: fisherron » Sun Aug 14, 2005 6:54 pm

Hi pimpmann

From what ive found this model of valve doesnt release fast enough.What i ended up using is the Rain bird Apas-075

hope this helps

buhyah
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Unread postAuthor: fenderfrk10 » Tue Aug 30, 2005 7:47 pm

i was just wondering...

i don't quite understand how the blowgun trigger moves the diaphragm. i was wondering if you could clarify that for me?
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Unread postAuthor: spudshot » Tue Aug 30, 2005 8:01 pm

there is pressurized air on both sides of the diaphragm, using the blowgun you exhaust the air on top of the phragm, so there is no pressure above, and your chamber volume is still pushing from below, that pushes the phragm up and allows the air go to to the barrel
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Unread postAuthor: drac » Tue Aug 30, 2005 8:03 pm

Hmmm, how to explain without getting complicated. A sprinkler valve works on the property of pressure diferences. When you fill the gun, the air goes through an equalization hole in the diaphragm, and keeps it seated. The area that keeps the diaphragm down is called the pilot area. The solenoid vent the pilot, but not nearly as fast as possible. So by putting the blowgun there, you exhuast the pilot faster, and that means the valve open faster. If you need any help, you can im me on AOL or MSN.

EDIT: Spudshot beat me. :(
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Unread postAuthor: fenderfrk10 » Wed Aug 31, 2005 8:40 am

thanks guys. i'm going to home depot today to get it

EDIT: unfortunately not one of my hardware stores carry it. this is going to be an adventure

NOTE FROM SPUDSHOT: please edit your posts instead of double posting
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Unread postAuthor: boom_o_matic » Thu Sep 01, 2005 7:08 pm

I havent been able to find the valve at any hardware store. What isle at Lowes should I look in. I know it is not in the pipe area, so where should I look?
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Unread postAuthor: sergeantspud2 » Thu Sep 01, 2005 9:52 pm

the sprinkler isle
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Unread postAuthor: saladtossser » Thu Sep 01, 2005 10:11 pm

nope, right beside plumbing, called irrigation
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Unread postAuthor: CS » Thu Sep 01, 2005 10:59 pm

Why dont you just ask someone at the store?
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Unread postAuthor: CaptPIKel » Sat Sep 10, 2005 9:22 pm

How big of a difference is there in a modded sprinker valve and a normal solenoid one? I'm going to keep using the solenoid though. I much prefer an electric fire.
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Unread postAuthor: saladtossser » Sat Sep 10, 2005 9:26 pm

10x faster, but u can keep both triggers, if u do it right, the solenoid doesnt bother you at all.
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Unread postAuthor: boilingleadbath » Sat Sep 10, 2005 11:08 pm

Is the number acctualy "10x"? I'm not so sure of that number, but I'd like to check - what is the flow provided by one of those solinoid valves?
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Unread postAuthor: kevl12377 » Mon Sep 19, 2005 11:34 am

Will this make my seloniod valve stop makeing that really loud noise like an airhorn?
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