whistling

We're selling a 3-year-old, new-build home. We've never had any plumbing issues and had several inspectors look at the house both as a buyer, and now as a seller. The current buyer's inspector identified that the water pressure is too high (about 100psi), and the buyer required installation of...

Hi, I am homeowner trying to troubleshoot a problem with my heater. I have Navien NCB-240E installed 1 1/2 yrs ago (manufactured 2016) on propane. I have 500gl outside propane tank with 2 regulators (on the tank and on the house). A month ago after refill my Navien started to make short (1-3sec)...

I recently changed the water filter in line with the drinking fountain and it now makes a loud whistling/whining sound, at relatively low frequency. The sound will persist as long as the drinking fountain is flowing. Fountain: The drinking fountain was part of a Whirlpool WHER25 RO filter...