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Discussion Starter · #1 ·
Hi newbie here!

I have a brass gate valve that no longer works to open (allow) water to flow through my sprinkler system.

How do I remove and repair this, I have never worked on PVC and I am afraid to cut this if it doesn’t work




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You are right to be afraid. White PVC piping isn't UV rated and isn't made for outdoor installations. It gets brittle and will probably snap if you start messing with it.

Are you sure the gate valve doesn't open? Usually those things have the opposite problem of not shutting all of the way. Have you tried to take it apart? The part that holds the "gate" (little disc) can be taken apart by loosening up the hex part that's furthest away from the handle. If you could get it apart you could possibly remove the disc and then put the thing back together in order to get flow.

Like I said though, the chances of snapping that PVC is probably very high.

The grey PVC that electricians use for conduit is UV rated and would probably be way better for an application like this, but it's not technically approved for water so you didn't hear this from me.
 

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Discussion Starter · #5 ·
I tried to unscrew the hex bolt on the gate valve, it does unscrew off the threads and water doesn’t really spray out, but I cannot get it off because of the handle. The handle won’t unscrew and come out. I yank it and pull on it and tried to unscrew the center of it.

As for PVC (white) I am not sure about UV but that does make sense. I know it can be brittle but I am in South Florida, and all the pool plumbing and sprinklers have it.

Since I can’t get the brass assembly off, I don’t know what other option I have except trying to replace it.


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There's about a 99.9% chance someone forced the tapered gate into its tapered seat where it sticks too tight, then when attempting to open the valve the stem end that was in a recessed pocket of the gate pulls out and then the valve is history.



Turn off the water supply and unscrew B. If everything comes out other than the gate the valve is history.
 

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Discussion Starter · #9 ·
Thanks! I will unscrew B best I can and see if the whole assembly comes out.

If so, I can replace that assembly with a new one pretty easily , correct?

What size gate valve is this? It says 200 on the side but not sure what that means


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By this time now, you could have cut the pipe on both sides of the valve and replaced it with a high quality ball valve and been done with this. To me, my time is worth a lot. More that I would ever spend to mess with an old gate valve when many other options are available. What are you going to do after you replace the packing in that gate valve and it leaks? You are still no closer to having solved the problem. Cut out the valve and replace it.
 

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Discussion Starter · #15 ·
Thank you! Any brand or model in particular that’s quality? The Home Depot’s seem to have crap and all leak together most user reviews.

This vs True Union? What is the difference?

I would rather spend more now so I don’t have to do it again down the road like (5-10 years)


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