Perform Minor Rebuild on Master Bathroom Toilet After arriving to the home, the tenant made me aware that the toilet in the master bathroom was making the same humming sound that the previous upstairs hallway toilet was making. I checked the whole house pressure at an outside hose bib, which read 60 psi. Previously, I checked the pressure at the water heater in the attic and it was just under 70psi. I made the homeowner aware that this could mean the PRV is failing. I checked the downstairs toilet, it has not been rebuilt either. After giving options, with upfront pricing, we agreed on just doing the minor rebuild on the master bathroom toilet. After replacing the fill valve, flapper, and supply line, I performed a dye test. After 10 minutes of observation, everything was functioning properly and no leaks were detected.