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I am trying to add a tee to my water main to branch a line for irrigation system. My water main is 1" CPVC and doesn't have enough movement to insert the tee. Any ideas?

Need the tee inserted in the red rectangle area

Need the tee inserted in the red rectangle area

  • Hello, and welcome to Stack Exchange. A picture of the water main where you're thinking to add the tee would be very helpful. – Daniel Griscom Jul 29 '18 at 21:40
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The solution to fitting a Tee fitting into an existing straight line pipe is to also add a Union fitting. The Union is a threaded coupler fitting that comes in three parts. Two of the parts get bonded to the CPVC pipe and the third part couples them together.

enter image description here

Picture source from PVC PIPE SUPPLIES

If you plan the re-assembly of the parts of the piping system carefully the final fit of the Union will just fit inline without concern of how to get it installed. Do note that you will have to have at least one side of the existing inline pipe freed up enough so that you can flex it to one side just enough to get the two glue joint sides of the Union in place.

Do not forget to slide the threader piece over the correct end of the existing piping before gluing the union parts in place.

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Looks to me like the upper brass device has a union built into on the downstream side (nut on top). So I don't see the problem with fitting a tee below it, or above it. If it is a backflow preventer, I'd think the municipality requires the tee to be down stream of it. But after googling, I suspect it is a pressure reducer.

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