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- columbus ohio
I'm rehabbing a home with one 2nd floor bathroom. The bathroom had terrible water pressure if any one fixture was running, and the shower always had bad pressure. When the walls were open I realized the whole home was running off 1/2 pipe. I replaced everything with 3/4 inch from the meter stepping down to 1/2 inch at the fixture. Currently the bath still has poor pressure regardless of whats running so i planned on replacing the fixture, although it looks new. When I put a gauge on the cold water feeding the vanity sink it reads 65 psi, when i flush the toilet the sink drops to 5, sometimes 0 psi. The hot water even loses pressure dramatically when I flush the toilet. If i shut off the toilet water inlet valve and have the cold water running in the 65 psi vanity it also drops dramatically when i turn on the bath water. I'm at a loss, i'm far from a trained plumber but Ive run complete water lines in 5 homes at this point without ever experiencing anything like this. Looking for any advice.