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P-Trap. Each sink has a P-Trap as does the bathtub.
Method 2:
The water heater bypass kit is designed and built to avoid having
antifreeze in the water heater.
1. Turn off the pump.
2. Drain the water heater and the entire water system.
3. Close the valve on the bottom and top of the bypass kit to
prevent liquid from entering the water heater.
4. Place siphon hose into container with antifreeze.
5. V-1 valve must be open and V-2 valve must be closed.
6. Open all faucets for air to escape.
7. Turn water pump on to supply lines with antifreeze. It will take 2
gallons or more, depending on length of lines.
8. You may wish to place a container under the faucet to catch
extra antifreeze.
9. Closest faucet to pump will fill first. Turn off each faucet as
antifreeze begins to come out.
10. Turn pump off when all faucets emit antifreeze.
11. Take contents in container and pour 1 pint in each drain to
protect each P-trap.
12. Any leftover antifreeze in container can be retained for future
use.
If you do not have a pre-built siphon hose in your coach, you could
purchase or build a kit to attach to the “in” port of the water pump. A
bypass kit is NOT standard on all coaches.
To gain access to pump and valves, you may need to remove the wooden
panel in front of the pump. This is on some models, not all. Some may
have this panel inside of the coach, under the sink.
Bypass Kit
Handles in horizontal position allows water to flow into and through water
heater and from water heater upon demand. Valves on bottom and top
portion of bypass are choice directional flow valves, not shutoff valves.
When bottom valve is in vertical position, it will prevent water from flowing
into water heater. Valve on top of bypass kit, when in vertical position,
will not allow back flow into water heater. Now you can send antifreeze
liquid through coach plumbing system without filling water heater.
Several reasons for not placing antifreeze into water heater:
1. Costly
– Would take an extra 6 to10 gallons of antifreeze.
2. Antifreeze can be very corrosive to the anode rod causing
premature failure.
3. Leaves sediment in the tank.
