Why does water come out of my shower head when I flush the toilet?
Answer: If your faucet drips when the toilet is flushed, you probably have high water pressure. What’s happening is the water pressure in the main water supply has gone over 80 psi, forcing water through an old seat washer whenever the toilet is flushed and water flows from the supply line to refill the toilet tank.
Why does my shower get cold when I flush the toilet?
If any of the branches demand water (you flush the toilet), there is less water available to all the other branches. Since the toilet only uses cold water, there is less cold water available to your shower when the toilet is filling.
Why does the temperature of the shower change when you flush?
Matthew PK answers: The shower temperature changes when you flush (or use water) because the pressure in that supply line has changed. This means less supply to the mixing valve in the same setting. Modern thermostatic mixing valves are designed to keep the total pressure constant.
What to do when a toilet flushes in your shower?
Since the mid-1990s, housing codes have phased out old-style shower valves in favor of anti-scald valves that protect you when a toilet in the house is flushed. If you have one of the older valves, you can provide a quick fix by removing your showerhead and replacing it with an anti-scald version, wrapping pipe tape around the threads.
What happens to water pressure when you flush the toilet?
Water pressure will naturally fluctuate, but when it begins to reach above 80 PSI, it creates a domino effect of problems in your bathroom. When you flush your toilet, water runs from the main line to refill the tank. When the toilet is full, it automatically closes the pipe between the water and the tank to prevent the toilet from overflowing.
If any of the branches demand water (you flush the toilet), there is less water available to all the other branches. Since the toilet only uses cold water, there is less cold water available to your shower when the toilet is filling.
Why does the shower head release water when the toilet is flushed?
The shower head releases water every time the toilet is flushed, even though he mixing valve for the shower is off. The bathroom area was an old porch with a concrete floor, so the water lines for the bathroom run: When I turn the hot water supply off, the problem goes away.
Since the mid-1990s, housing codes have phased out old-style shower valves in favor of anti-scald valves that protect you when a toilet in the house is flushed. If you have one of the older valves, you can provide a quick fix by removing your showerhead and replacing it with an anti-scald version, wrapping pipe tape around the threads.
Matthew PK answers: The shower temperature changes when you flush (or use water) because the pressure in that supply line has changed. This means less supply to the mixing valve in the same setting. Modern thermostatic mixing valves are designed to keep the total pressure constant.
