Customer stated that there was a sewage smell coming from master bathroom. Diagnosed and couldn’t find anything out of the ordinary in bathroom that could’ve be causing sewer gases to escape. Will send estimate for smoke test. Cleaned out one sink ptrap in master bathroom. Also checked to pressure to home and found that water pressure was at 100psi and that water heater didn’t have a thermal expansion tank. Furnished and installed new PRV with main house shut off and also furnished and installed new thermal expansion tank with bracket. Tested and no leaks were present at this time. Set water pressure to 62psi. Cleaned up work area.