Section 7: Plumbing System; 12-Volt Water Pump & Switch; Fresh Water Holding Tank - Jayco SENECA Owner's Manual

SECTION 7
PLUMBING SYSTEM
F W H
RESH ATER OLDING
The fresh water tank can be gravity filled or
pressure filled using the fresh water inlet
(called city water). Plastic overflow tubes are
plumbed into the fresh water holding tank to
allow water to flow out of the water tank.
Occasionally, you may see water coming from
the overflow tubes (located underneath the
motor home) when the fresh water holding
tank is filled. This is normal, and is caused by
external circumstances, including the motor
home being parked on an incline, or the
motion caused by starting or stopping the
motor home during travel.
Be careful not to overfill the fresh water
holding tank. It can pressurize the tank,
causing leakage and water damage and
void the warranty. DO NOT leave the tank
unattended while filling.
Do not cap, block or modify the fresh
water tank overflow tubes in any way.
Enough water pressure can build up
during the filling process to damage the
plumbing system if the overflow tubes are
obstructed.
W P
ATER RESSURE
( S
CUSTOMER UPPLIED
Excessive pressure
systems may be encountered in some parks,
especially in mountain
pressure regulators are available to protect
the water system against such high pressure.
Water pressure
supplied) are available from your RV dealer to
protect the plumbing system against such
high pressure.
Not using a water pressure regulator when
using city water may cause the o-rings to
fail. To prevent damage to the plumbing
system or components when using the city
water connection, a 45 lb. (315 KPa) rated
water pressure regulator is recommended.
7 - 2
T
ANK
R
EGULATOR
)
from water supply
regions. Water
regulators (customer
12-V W P
OLT ATER
When you want to use water in your motor
home and it is not hooked up to city water,
you will need sufficient 12-volt DC power to
run the water pump.
Fig 7.1 Water pump
Once activated, the water pump (also known
as the demand pump) will self-prime, and
provide water. The water pump continues to
run until approximately 45 lbs. of pressure is
achieved then shut off. The water pump will
automatically re-start when pressure drops.
Some cycling may occur, depending on the
volume of water being released. The water
pump has a built-in check valve to prevent
water from back flowing.
All water pump switches illuminate when the
water pump is activated. Please be aware the
water pump must be shut OFF at the same
switch used to turn it ON.
The water pump switch should be in the OFF
position when the motor home is unattended
for any amount of time. If something would
happen to the water system, this may help
limit water damage to a smaller area.
Fig. 7.2 Water pump strainer
Periodically check the in-line water pump
strainer for accumulated debris. To clean,
shut off the water pump, unscrew the clear
cap, remove the re-useable metal strainer and
clear any debris, then reinstall.
& S
UMP WITCH