PLUMBING SYSTEM
SANITIZING/WINTERIZING THE PLUMBING SYSTEM
Tank Versus On Demand Water Heaters
When winterizing and sanitizing it is important to keep bleach
solutions and anti-freeze out of your hot water tank. For this
reason, systems with a tank water heater have an added bypass
line that allows the solutions to never enter the tank. The bypass
line and associated valves are found at the water heater.
• Normal Mode: allows water to flow into the water heater.
Both hot and cold bypass valve handles should be pointed
toward the water heater connections.
• Bypass Mode: diverts the flow of water around the water
heater keeping water out of the water heater. Hot water
bypass valve handle (C) should point inline with the hot
water outlet line. Cold water bypass valve handle (B)
should point inline with the cold water inlet line.
Units with on demand water heaters do not have the bypass line, as it is
acceptable to pass sanitizer and antifreeze through these systems. However
the water heater should always be turned off when doing so.
Antifreeze Siphon
With both tank and on demand water heater systems there is an additional line
and valve (A) added just before the water pump that allows you to use the water
pump to siphon antifreeze into the fresh water system, skipping the fresh water
tank. Turning Valve A towards the siphon line changes the input flow from the
fresh water tank to the siphon line.
Utility Centers
If your RV has a Utility Center, please refer to “UTILITY CENTERS” on page
66 for special instructions specific to the installed Utility Center in regards to
sanitizing/winterizing.
2-Valve Tank Water Heater Bypass - Valves Shown in Normal Mode
Valve A
Valve B
Valve C
Tank
Water
Heater
Fresh
Water
Tank
Pump
Cold
Output to
Fixtures
Antifreeze
Input
Bypass
Line
Gravity
Input
City Water
Input
Hot
Output to
Fixtures
Filter
Fresh
Water
Tank
On Demand
Water
Heater
Gravity
Input
City Water
Input
Valve A
Pump
Antifreeze
Input
Filter
Cold
Output to
Fixtures
Hot
Output to
Fixtures
On Demand Water Heater System - Valve Shown in Normal Mode
Sanitizing the Plumbing System
Sanitize your fresh water system:
• When your RV is new.
• At the beginning and end of each season.
• When the water system becomes contaminated or every three
months of use.
Preparing to sanitize
Prepare a chlorine solution using 1/4 cup of household bleach to
one gallon (3.785 liters) of water in a container. Prepare one gallon
of solution for every 15 gallons of tank capacity. This will result in a
residual chlorine concentration of 50 ppm in the water system and
should remain in system for at least 4 hours.
If a 100 ppm concentration is needed, use 1/2 cup of household
bleach with one gallon of water. One gallon of the solution should be
used for each 15 gallons of tank capacity. Allow to remain in system
for at least 1 hour.
Fresh water tank sizes vary by model. Contact your dealer or
customer service for your specific tank size.
How to sanitize
1. Turn water heater OFF (both electric and LP gas switches if
applicable).
2. Set the bypass valves to the BYPASS position for tank water
heater systems.
3. Level the RV and drain the fresh water system (see
“DRAINING THE FRESH WATER SYSTEM” on page
65).
4. Close the low point drain valves, the fresh water tank drain valve,
and reinstall the water heater drain plug.
5. If the RV has a cartridge type water filter, the filter must be
removed from the housing. Sanitizer should never be allowed
into a water filter.
6. Pour the sanitizer solution in the fresh water tank using the
gravity fill inlet. Do not use your non-toxic drinking water
hose.
7. Continue filling the fresh water tank with clean (potable) water
until tank is full.
8. Turn the water pump on to send water through the lines. Open
all hot water faucets one by one until water begins to flow
continuously and a chlorine smell is noticeable. Include outside
shower faucets (if equipped).
Page 75
PLUMBING SYSTEM
8
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