If a shower valve leaks after installing new washers, what should you do?

When a shower valve leaks even after new washers have been installed, addressing the valve seat is often a crucial step. The valve seat is the surface against which the washer seals. Over time, this surface can become pitted, corroded, or worn, preventing the new washer from creating a watertight seal. Dressing or replacing the valve seat restores its smooth surface, allowing for proper contact with the washer. This action can effectively stop the leak without the need for more extensive repairs or replacements.

In contrast, replacing the entire valve may not only be unnecessary but also more costly and time-consuming if the issue stems from the valve seat. Adjusting the water pressure might not address the underlying problem and could potentially exacerbate the leak if the pressure is too high. Applying sealant around the valve might provide a temporary fix but is not a reliable long-term solution, as it does not address the root cause of the leaking, which is often related to the condition of the valve seat itself.