Phister Avante, Shower 10° cooler than sink

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dwhightowe

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This shower valve, at its hottest setting, runs at least 10° less than the sink faucet that is right next to it.

Is there some kind of internal adjustment to it? Perhaps to protect against scalding? Our kid is now a grownup and wants his showers hotter, and if I don't fix it I'm afraid he will try to and who knows what will happen.

Best,
Dave

Unknown Shower Faucet.jpg
 

Terry

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I don't think that's a pressure balanced valve, and I'm not sure that is an adjustment on the handle either.
I wonder if there is a tempering valve somewhere. Sometimes located under the sink cabinet.

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dwhightowe

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I don't think that's a pressure balanced valve, and I'm not sure that is an adjustment on the handle either.
I wonder if there is a tempering valve somewhere. Sometimes located under the sink cabinet.

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I pulled this bad boy out and now we have full hot. Thanks for the help. Heading for the tip jar.
 

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Jadnashua

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That piece is usually designed to slide into place in multiple positions and is there by code to ensure the maximum shower temperature is NGT 120-degrees. Adjusting it during install is a step in the instructions, but with changing water temperature on the cold with the seasons, if done in the summer, it may not be hot enough in the winter when the inlet cold water is potentially way cooler. The best way to resolve that is with a thermostatically controlled valve, then it should be where you want it summer or winter, but there do cost more.
 
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