Hi my house is 8 years old and have a copper plumbing. I'm not getting enough water pressure at my shower especially when somebody using the other bathroom. I took off the shower head and still the same.then I change the water pressure regulator in front and still the same I don't know what to do help thank you

Hello 40, What brand of shower valve do you have? Is it single handle or two handle? It sounds like your water piping is under sized. Get back to us so we can try to come up with a solution. Thanks ----zeke----

I'm not getting enough water pressure at my shower especially when somebody using the other bathroom.
This takes the problem awayfrom the shower valve and puts the focus on the supplies. Did this just start or has it always been a problem? Let us know, Tom

It also won't hurt us to know your water pressure.

Hi to all ,thanks .I have a single handle and the name brand is price fpister.it was fine for the first 6 years and started last year. I thought it was only the city trying to conserved water but they said main water pressure is fine .so I decided to change my water pressure regulator.its brand new and its pressure is around 60 to 70 psi

Lets back that PRV down to about 45-50 psi for starters. It will not fix your problem, maybe make it worse but 45 is where it should be. Have you removed the shower head and cleaned it with CLR or the like.

hi to all ,thanks .i have a single handle and the name brand is price fpister.it was fine for the first 6 years and started last year. i thought it was only the city trying to conserved water but they said main water pressure is fine .so i decided to change my water pressure regulator.its brand new n its pressure is around 60 to 70 psi What material are your pipes? Here's a one handled Price Fpister valve. Open it up and pull the cartridge. Clear the inlet ports on the cartridge,(see image) or simply replace it. Now turn on the water for a minute to flush out the supplies and open valve body. You should have a strong stream when you do. If not then let me know. Good luck, Tom