Clean.vents.and.screens; Winterizing.the.water.system - Four winns 310 Horizon Owner's Manual

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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 the screen..The.stainless.
steel.vent.cap.is.not.removable...
NOTICE
Failure to keep the water tank vent fittings
clean will cause excessive pressure buildup
within the tank during filling. This can cause
water tank damage.
Periodically remove the filter screens from the fau-
cet.discharge.spouts.and.shower.head..Remove.the.
accumulation.of.sediment.from.the.screens..If.neces-
sary, clean out the holes using a fine wire. A buildup
of debris in the faucet filter screens can create enough
restriction.to.cause.the.pump.to.cycle.on.and.off.
Check the in-line water filter/screen for sediment and
blockage..It.is.located.between.the.water.tank.and..
the.pressure.water.pump..If.obstructed,.remove.from.
the.water.line.and.either.clean.or.replace.the.part...
The filter unit will twist apart.
Inspect.and.clean.the.shower.sump.every.30.days..
Some.water.will.always.be.in.the.compartment..Se-
diment.and.other.debris.will.buildup.and.affect.the.
automatic.bilge.switch.and.pump.operation..Remove.
the.pump's.cover.and.clean.the.screen..The.screen.
will.become.blocked.and.the.pump.will.not.operate.
properly..To.clean.the.compartment,.use.baking.soda.
and a fine wire brush to remove dirt and other debris.
This.will.also.serve.to.disinfect.the.area.
B. Winterizing the Water System
Winter.lay-up.service.procedures.should.include.a.
thorough.draining.of.the.water.system..Disconnect.all.
accessible fittings. Blow out all lines. Be sure the hot
water.heater,.fresh.and.gray.water.tanks,.transom.
shower,.pumps.and.lines.are.completely.dry..Leave..
all.faucets.open..Freezing.water.can.cause.severe.
damage.to.all.water.system.components.
NOTICE
Always winterize the fresh water system prior
to winterization of the hull drainage (bilge
pump) system.
Sport Boat Waste & Water System - Section J
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.RV.anti-
freeze).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.
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