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The water flow/pressure to my tub/shower is slowed to barely a dribble. Answered

The pressure to the sink in the same bath is fine. What could be the problem for the reduced flow to the tub/shower but not the sink? I've tried changing shower heads but this didn't help?


If it's a cartridge type of shower, the cartridge could be bad. Simply replacing the old cartridge would solve the problem. I don't know about any other brands, but I know that if it's a Moen, just call them and they send out the replacements for free for life. That's how I get mine. I don't work for them or anything. That's just what my plumber put in and I have been thrilled with it.


If it's an older valve that directs the water upward, there could be a loose screw on the end of the valve, and it is letting the gasket block the diverter tube to your shower head. You'll need a set of cowbells (assortment of large socket tools, purchased at any hardware ) to unloosen the diverter valve. I have evn seen these screws come all the way out and sit on the hole that water should pass through. If the valve is an individual one, you won't need to turn off the main water. In that case the water is stopped at both the hot and cold valves already.


Do some elimination problems. Is it the shower only, or both? You mention that you replaced the shower head to try to fix it, does the tub have good pressure? Is it hot AND cold that aren't reaching the tub? Is the pressure better at the shower or tub? Are there shutoff valves in the access panel to the tub? (If there aren't, you might have to shut off ALL the water to fix it) How old is the tub? If it is old enough, you might have to replace pipes if hard water has built up in them. If they are relatively new, it's more likely that the faucet insides have gotten clogged or broken. Is there any unusual stiffness or looseness in the faucet handle? If something broke inside, it might be sticking or blocking water flow.

Is this just the shower, and is it fixed at a height?


. There could be an obstruction in the piping to the shower. Possibly mineral deposits or a kink in the piping. . The shower mixing valve may be messed up. . If there are shut-off valves for the shower feeds, they may be partially closed or messed up. If you've never had good pressure, I'd check this first.