One of my properties has a 1" pipe (galvanized I think) sticking out of the concrete driveway, near the front of the house where a fence gate is.

Nothing comes out of it when the city water is turned on, or when the irrigation pump (draws water from the lake) is turned on. There is a dead electrical conduit next to it which goes no where also.



So I got curious and did some digging.

First I removed the garden valve and it appears to be a 1" female connection? I put a 3/4" copper pipe next to it and it's bigger.





On the other side of the gate I dug and found two pipes. One at the bottom is a 3/4" galvanized water pipe which badly needs replacement (another story), the one on top of it is some sort of "poly" pipe? Now I took out some #12 copper wire and fed into the rigid pipe opening where the garden valve was connected to, and the wire came out of this pipe!





So under there is some sort of an adapter that connects a rigid galvanized pipe to this poly pipe?

Can someone confirm this is a poly pipe?

If I want to activate the pipe and bib I have to connect to this poly pipe right?

How? I have a sprinkler line near by that is 3/4" SCH 40 PVC.



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You have disassembled the valve body. Part of the valve is still screwed onto the Galvanized Pipe. You cannot cap off that thread, you must remove that part of the valve to cap it off with a Galvanized Cap.



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ah OK, I thought the threads look strange like machine threads. So I need to get out my plumber's wrench and take off that lower part of the valve.

How would I connect to that poly pipe?

A brass insert female adapter would transition from the galvanized to polyethylene.

NC Plumber, thanks.

For some reason I just noticed the two remaining pictures didn't post.

I am not transitioning from galvanized to poly. The existing stuff is a piece of poly (I think) under the dirt to a piece of galvanized pipe sticking out of a concrete driveway slab. I want to replace that garden valve and reactivate that pipe (which may also lead to a few sprinkler heads in the front yard).

I have previously relaid all the sprinkler lines in the backyard and have terminated a 3/4" PVC line about three feet away. So what I think I might do is to connect the PVC line to the poly pipe, pressurize it and see what happens.

I need one of these?



It's barbed end is pushed into the poly pipe and you tighten down with a hose clamp?

In that case I would use a PVC slip X barb. It would glue onto a PVC pipe and have barbs to clamp the poly to.



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I just measured the black poly pipe. It has an ID of 1" and an OD of 1-1/4", the thickness is 1/8".

Does that mean the size of the barb end of the adapter needs to be 1"?







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