I have a delta shower valve, price pfister fixture. After about 4-5 minutes in the shower there is a sudden pressure drop. Only in the shower the other faucets in the house are fine. Is this a clog or is it time to replace?

If you post the model number will be great help, normally their will be dirt inside the faucet and requires removing the cartridge and flushing out the dirt will help, if not then you have to replace the cartridge, Thanks.

John

Does the pressure drop when other fixtures in the house are being used. Say your taking a shower and someone takes a dump, flushes the toilet, or starts a load of laundry, or starts the dishwasher, or , or , or. Does the pressure come back after a minute or two, or does it stay low once it cuts out.