CHAPTER 7
FRESHWATER SYSTEM
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34z
7.0 GENERAL
The 40z incorporates a pressurized freshwater system from either of two
sources (1) a single 100-gallon tank under the main saloon sole that
supplies a pump which maintains a constant pressure in the system, or (2) a
dock hose inlet
located to port in the cockpit as shown at right. When
connected, dock water and pressure is used directly by all outlets in the
boat... by passing the freshwater pump and water tank. A check valve keeps
the dock water supply from backing up into the boat’s water tank and
overflowing it.
When using the dock water supply, be sure to turn OFF the “fresh water pump”
breaker on the 12V DC Panel, otherwise the ship’s water pump may win the battle of water
pressure and emptying your water tank into the city system.
When leaving the boat with the dock water supply hooked up, be sure to turn
OFF the dock water faucet. If there’s a failure of a fresh water fitting or the pressure regulator, the
boat could fill up with water and sink... as there is no limit to the amount of water from the city
source as there is with the boats own water tank.
7.1
FILLING WATER TANK
A deck fill is provided on the starboard side deck near the helm station and is labeled WATER. As
the tank is filled, air escapes thru the vent. This tank cannot be filled using the dock hose inlet.
7.2 FRESH
WATER
PUMP
(at right)
The freshwater pump is turned on at the DC breaker panel. If the pump
is heard running continually, check that no faucet has been left open. If
this is not the case, turn off the pump and check that the tank has not
been emptied. The freshwater system is not a perfectly sealed circuit
and it is not uncommon to hear the pump cycle, but if this short cycling
occurs more than once per hour, the system and/or pump should be
checked for leaks. Some users will want to turn the pump off at night to
avoid hearing it cycle.
The pump is protected from sediment by an in-line strainer mounted
adjacent to the pump. The strainer should be checked periodically and
cleaned if necessary. Status lights on top of the pump housing can be
interpreted by reading the Manufacturer’s manual in the white binder.
7.3 HOT
WATER
Water in the 13-gallon hot water tank is heated in one of 2 ways (1) whenever the engine is
operating or when the engine is not running, by turning on the “Water Heater” breaker on the AC
Shore 2 panel. It is part of the freshwater system and does not need to be filled separately. There
is virtually no need for maintenance, but the connections at the tank should be visually inspected
occasionally.
The coolant lines from the engine to the tank have shut-off valves. These need to be OPEN in
order for the engine to heat the water in the tank. For service, or in case or a ruptured line, these
valves can be closed to stop this water loop.
