RV Back Flow Preventer 1/2' Brass Check Valve

Have you ever turned on your cold water and had hot water come out? Sure, oftentimes, this just means you have to wait for the cold water to make it up through the pipes but this waiting means wasting water that you could have used. In an RV with a limited freshwater supply, this just isn't a good situation. Luckily, there is a simple and easy solution. What is happening in this situation is that the hot water from the hot water heater is flowing back down into your water system and into the cold water tubing, which then travels up to your faucet when you turn it on. By installing a backflow preventer into your water system, you can prevent this from happening.