I can find the shut off valve for the cold water supply to the hot water heater but not the hot water discharge. When I send the pink stuff thru the lines is this going to be a problem. Do some mfrgs use a check valve instead?
Answer, YES! The check valve is about 3/4 of an inch long. What you need to do is shut off the cold water intake, open the bypass so cold water is going directly to your hot water taps.
Now drain the HWT and then pressurize the system with water. This will ensure that your check valve is working. Once you have one that is stuck open, and you dump a few gallons of anti freeze out the HWT drain valve, you will realize the importance of this check.
Mike and Carole
2009 Triple E F254SSXL Fifth Wheel
2005 16.6 Double Eagle
2000 F350 7.3 SC 4X4
previously Snowbird Campers
Our Minnie has a single valve bypass setup for the water heater. There is a check valve in the hot water outlet. The one valve is a 3-way valve. A 1/4 turn of the valve handle switches between normal use and bypass. In the picture below, the valve is set to bypass.
Our Lance camper had a 3 valve setup to bypass the water heater which was located below the kitchen sink and easy to access.
The fifth wheel only has a single 3 way valve aand it is located behind a drawer which must be pulled to gain access.
It is a cumbersome method but patience goes a long way.
2007 Tango 2660RKS Fifth Wheel, 2006 Chevy D/A 3500 with service body,