HouseChalk
Pressure-balance valve
A pressure-balance valve is a shower valve that automatically adjusts water pressure to maintain a consistent temperature when other fixtures are used.
Why it matters
It prevents scalding when someone flushes a toilet or runs a dishwasher while you are in the shower.
Where people get this wrong
A pressure-balance valve maintains temperature by balancing pressure, not by setting a precise temperature. For exact temperature control, use a thermostatic valve.
Real-world example
You are in the shower and someone starts the washing machine. The pressure-balance valve adjusts instantly so the water temperature barely changes.
Where this hits your build
This hits during the selection phase. Choices here affect layout, daily use, and maintenance. Samples and measurements matter more than catalog photos.
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