Results for "backflow preventer"

According to my neighbor I need to replace the valve, the RV dealer says it's just a clog, and YouTube insists it's a pump issue with my 2012 36 QSP's black tank flush system. When I connect my hose to the flush port and turn on the water, nothing seems to go into the tank - the water just doesn't flow in like it should.

I'm wondering if there's a check valve that might be stuck or if something is clogged up? I've used the flush connection earlier in the year without any problems, so this is puzzling. I've heard about debris getting in the spray nozzle too. What are the most common causes when the black tank flush won't accept water, and what should I try to fix it? Any guidance would be really appreciated since I'm not sure what to troubleshoot first! …more

About four years into owning my 2019 Winnebago, the hot water pressure is starting to completely tank — should I repair this backflow preventer or replace the whole unit? My 2002 Winnebago with an Atwood 10 gallon water heater just lost all hot water pressure overnight. Cold water works perfectly fine, but turn that handle to hot and... nothing. Zero pressure at any faucet.

The weird thing is the tank itself has hot water and pressure - I can open the relief valve and water shoots out fine with good pressure. It's like something is blocking the hot water from getting out of the tank to the faucets. I've checked what I can reach and don't see any obvious blockages in the lines.

Anyone know what could cause hot water pressure to just disappear like this while cold water works normally? There's gotta be something simple I'm missing here. …more