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Section 8: Plumbing System
Winterize with Air Pressure
This method uses compressed air to blow out any remaining water in the system after ini-
tially draining water using drain valves.
Tools required would be an air compressor and
a blowout plug.
1.
Turn off water heater gas valve typically located outside the RV. Water heater power
should be OFF (both ELECTRIC & GAS switches). (Turn off power to the tankless
water heater if equipped.)
2. The Uni-Doc utility center has no dedicated water heater bypass valves. This function
is built into the utility center.
3. Level the RV and drain the fresh water tank, the tank (storage) water heater and the hot
and cold water lines. Open all low point drains and the fresh water tank drain. Faucets
inside the RV should be opened to relieve pressure
to allow water lines to drain.
Refer to Draining
the Fresh Water System
section
.
4. Remove the drain plug from the tank (storage) wa-
ter heater located outside the RV
(Fig 1).
Do not
remove the drain plug if the water heater is hot
or under pressure. Release pressure and let it
cool down.
5. To drain a tankless water heater (if equipped),
open water faucets and use compressed air at
the City Water Connection on the utility center.
There is no drain plug.
6.
Water filter should be removed for winterizing.
See
Water Purification System
section. Your RV
may have one of two types of filters:
Full System Canister Filter:
Remove the canis-
ter, take out the filter and then re-attach the empty
canister.
Cartridge Water Filter:
Remove the cartridge
filter and replace it with a bypass hose (supplied
with your RV).
Before applying air pressure to the utility center,
4 colored valves (WHITE,
RED, GREEN, BLUE)
MUST
be set to 45° or damage may occur to the util-
ity center.
Never apply air pressure to the water system with any of the valves in the
closed position. Air pressure applied to a closed valve, faucet or low point
drain could potentially damage the seals and cause water leaks. If you have
questions, consult your RV dealer. Using RV antifreeze is the preferred meth-
od of winterization.
Recommended air pressure is 30 PSI MAX.
Exceeding this pressure may
rupture water line couplings and void your warranty.
Table of Contents
Maintenance Record
Summary of Contents for Precept
Page 1: ...2021 Owner s Manual 0230295 2021 A subsidiary of Thor Industries Inc...
Page 2: ......
Page 8: ...Table of Contents...
Page 23: ...21 Section 1 Warranty Service Table of Contents Maintenance Record...
Page 24: ...22 Section 1 Warranty Service Notes Table of Contents Maintenance Record...
Page 34: ...32 Section 2 Occupant Safety Notes Table of Contents Maintenance Record...
Page 40: ...38 Section 3 Pre Travel Information Notes Table of Contents Maintenance Record...
Page 156: ...154 Section 13 Exterior Notes Table of Contents Maintenance Record...
Page 160: ...158 Section 14 Travel Camping Storage Checklists Notes Table of Contents Maintenance Record...
Page 164: ...162 Section 15 Additional Information Notes Table of Contents Maintenance Record...