Why your shower loses pressure when mixing hot and cold water
In short: Plumbing expert Richard Trethewey demonstrates how to diagnose and fix a faulty shower mixing valve. If your shower struggles to maintain full water pressure when blending temperatures, the culprit is often a worn pressure-balancing cartridge that requires replacement.
When a shower fails to deliver consistent pressure during mixing, the issue typically lies within the pressure-balancing cartridge inside the valve. Richard Trethewey shows the process of updating this component to restore proper function.
The repair involves shutting off the water supply, removing the handle and face plate, and extracting the old cartridge. After installing a new unit with lubricated O-rings and a new cap, the process concludes by attaching a fresh trim package to update the fixture's appearance.
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Sources
- Summary by Intellect · source: How to Replace a Shower Mixing Valve | This Old House
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