Clean Vents And Screens; Winterizing The Water System - Four winns Horizon 210 Owner's Manual

The decomposition of waste produces a color-
less, odorless gas, methane, that is lighter than
air, combustible, and extremely lethal. Always
provide sufficient ventilation when effecting re-
pairs to the waste system and allow no odor from
the waste system to go unresolved.
A. Clean Vents and Screens
Periodically, inspect the water tank vents and thru-hull
vent fittings for any dirt, wax, etc. Carefully remove any
obstruction with a pipe cleaner or similar device. Be
sure not to puncture any screens. The stainless steel
vent cap is not removable.
NOTICE
Failure to keep the water tank vent fitting clean
will cause excessive pressure buildup within the
tank during filling. This can cause water tank
damage.
B. Winterizing the Water System
Winter lay-up service procedures should include a thor-
ough draining of the water system. Disconnect all ac-
cessible fittings. Blow out all lines. Be sure the water
tank, waste tank, pumps and lines are completely dry.
Freezing water can cause severe damage to all water
system components.
NOTICE
It may be necessary to disconnect the hose be-
low the faucet to remove excess water in the
lines to prevent freeze damage.
NOTICE
Always winterize the fresh water system prior to
winterization of the hull drainage (bilge pump)
system.
Draining the system as mentioned can be very tedious
and an incomplete job can result in expensive repairs.
The use of nontoxic antifreeze (such as R.V. antifreeze)
designed for fresh water systems considerably reduces
the work necessary and is a more positive means of
winterizing the system. Follow the directions included
with the antifreeze solution.
Horizon & Sundowner
Owner’s Manual
06/00
To winterize:
1. Turn on the water pump/faucet and drain the water
tank. The water tanks on some models can be
drained by removing the withdrawal hose from the
tank and allowing water to drain into the bilge.
NOTICE
DO NOT run the water pump without water in
the system. Pump damage can result. Be
watchful and turn the pump off as soon as the
tank becomes empty.
2. Add 1/2 gallon of R.V. non-toxic antifreeze to the
water tank.
3. Turn ON the pump until undiluted antifreeze is seen.
Use only nontoxic antifreeze solutions such as
R.V. antifreeze. DO NOT use ethylene glycol
solutions; the type that is used in engine cool-
ant systems. These are toxic.
NOTICE
Be sure to wipe up any antifreeze that has been
spilled on the fiberglass surfaces to prevent pos-
sible discoloration or damage to the gel coat.
Depending upon options and model, additional informa-
tion by the equipment manufacturers is included in the
owner’s packet. Also, refer to Section R for Mainte-
nance.
Section J
Page 6