neporcupine
New Member
I am installing a water pressure regulator right after main inside main water shutoff. I am not required by code to have a check valve, so I am not doing this. I understand it is standard to put an expansion tank on the water heater as well, so I will also likely do this. However, I was reading the instructions on my watts pressure reducing fitting model “LFN45BUM1”. See the photo under “bypass feature”. They seem to be claiming that their fitting is able to accommodate any thermal expansion. Am I right in my interpretation of their package insert? If so, is it that it has been found to be inadequate, so plumbers install an expansion tank anyways? Thanks!
