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Before After
Background –
In a Recreation Vehicle (RV) there are six
functions that are desired to service holding tanks, fixtures,
and the on-board pump. In previous RV system designs the water
was fed by gravity into the holding tank with a separate feed
for a pressurized fitting from the city water tap directly to
the fixtures. The water could then be pumped with the onboard
pump to the fixtures when not connected to the city pressure
fitting.
Modern RV designs are requiring a higher degree of functionality
with the following six functions:
(1).
Fill the On-Board Tanks
(2). Pressurized Water Directly to the Fixtures
(3). Pump from the Holding Tank to the Fixtures
(4). Draw Winterizing Fluid from a Bucket into the
Holding Tank, Lines and Fixtures.
(5). Sanitize the Tanks, Lines and Fixtures with the
On-Board Pump
(6). Fill the Holding Tank from a Bucket or Stream when
City Pressure is not Available
Previous designs of this type utilized up to five valves and a
logic diagram to fulfill all functions as detailed below.

Anderson Brass Solution –
In the Anderson Brass solution a single valve with internal
porting simplifies the customer interface with a four position
handle only to fulfill all five functions. Below shows an
installed valve and the multi-port valve used to perform all
functions.
The
Installation The Multi-Port Valve
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