I keep losing the water pressure in my shower when I turn it to hot , why is this?

Could be the cartridge is going bad or that a washer has loosened or that the hot water inlet is blocked with sediment, etc...

Best solution is to shut the water down and remove the guts to the shower valve... check the condition of the washers and/or the cartridge and then pulse the water real quick to dislodge any sediment in the line. Then re-install all.

If this does not fix it then plan on replacing the entire cartridge assembly.. this usually guarantees a permanent fix!

If need mor e help with this just let us know. Have a model number or name on the valve available and we'll see what we can come up with.

Otherwise, the above info. Should get you up and running!

MARK