Today a contractor installed a water line from the main to my house. During the tie in, the pipe continued to leak. The fitting thread was found to be defective, so the contractor placed 3/4 line about 16 inches from the main to the 1 inch line, and then fed the 1 inch to the house and water meter.
Will this 3/4 to 1 inch affect my flow or pressure? Is this ok to do? I am not 100% sure this was right.
Best Answer
You're right to be suspicious. I'm not sure about code, but to me this just looks unprofessional. Narrower pipe does result in pressure and flow loss. Expansion also has the potential to create eddy currents which could accelerate erosion of fittings on the output side of the final 1" fitting... that said, contraction/expansion happens normally at most fittings anyway. The good news is, this is such a short section of pipe, that even if you absolutely require a 1" main the effect is entirely negligible. Since you effectively have a 3/4" main inside the house, doubly so.