how do I decrease water pressure for my toilet

10 years ago

The water pressure at my house is 100 psi. Most of the house is OK with the higher pressure but one toilet is continuously running. Is there a pressure reducing valve that can be added to just the toilet water supply line? I hate to go through the trouble and expense of reducing the water pressure to the entire house.

Featured Answer

homebound

10 years ago

Verify a couple easy things:

1) Is the fill valve's hose clipped to the overflow tube (correct) or pushed down into the tube (incorrect).

2) Is the fill valve float adjusted so it shuts off before water reaches the top of the overflow tube? (If it's beyond the range for adjustment and is too tall, you can remove fluidmaster fill valves and screws the upper and lower parts together (makes them shorter), then reinstall.

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Comments (9)

gregbradley
10 years ago
All houses should have a regulator so that pressure inside is about 40-60 psi. 100 psi can work for a while but will eventually cause some problems. You will probably be better off in the long run to install a regulator for the house.
klem1
10 years ago
I agree with greg,100psi is insane water pressure but if you choose,the regulator can be installed just for toilet. Why do I believe you knew that without being told? ^_^
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kudzu9
10 years ago
Also, are you sure that it is running continuously because of the pressure?
sshome
Original Author
10 years ago
I have changed the flapper and internals of the tank with no luck. I thought it is probably a water pressure problem and I bought a pressure gauge to check. That's how I know it is 100 PSI. I don't have an adjustable pressure valve at my house now. I don't really want to spend $300+ for the installation of a valve at the water main. I was hoping that someone could recommend a $30 regulator that can screw onto the tanks water supply line. Perhaps no one has invented one yet.
klem1
10 years ago
Oh someone invented pressure regulators decades ago and someone else invented fittings to adapt them to any configuration imaginable. Everything you need is available at your neighborhood plumbing supply house. As far as you not wanting to pay going price to have it installed,join the club,most of the people here would do it themselves.
sshome
Original Author
10 years ago
I disassembled the float valve and found that the diaphragm was worn. I went ahead and replaced it which has solved my problem. Thanks for the suggestion.
Vith
10 years ago
Should still have PRV for your house... but whatever floats your boat. If you are interested you could always shut off the main valve and install the PRV after it.
kudzu9
10 years ago
sshome-

Glad it got fixed, and thanks for the update. I was never convinced that the water pressure was the source of the problem...but I've been wrong before ;-)