I have recently installed a new bathroom. I have a bath/shower tub where the shower dials are independent of the bath taps. My problem is that I am getting hot water to the sink and bath taps but I only get luke warm water from the shower (at best).
Can someone please help in advising me what the problem might be and how I can resolve it.

Thank you in advance.

Hi Perplexed...

Have you checked the TEMPERATURE LIMITING DEVICE? If not, check the instructions for your valve and they should tell you how to make the proper adjustment.

If that is not the issue when reset then you may need to turn the shower cartridge 180 degrees in the valve... could be installed upside down... ;)

While the cartridge is out, pulse the water on/off to clear the lines of any new construction junk... just in case.

Let me know what happens, OK?

Mark