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4P: Head Systems
4P1: Overview
The head system on this boat is reliable, straightforward, and easy-to-use.
First, a note about discharge of sewage:
It is forbidden to discharge untreated sewage in inland US. waters,
an area that includes all US. waters in which this boat operates. The
boat holding tank must only be emptied at proper pump-out stations
if it is in US. waters. (This rule does not apply in certain Canadian
waters. However, in Canada, courteous practice dictates that the
holding tank be dumped only when outside confined marinas.)
The boat is equipped with a Vacu-Flush Marine head. This has a separate vacuum
pump which macerates waste and puts it into a holding tank. The holding tank is emptied
either of two ways: by operating an overboard macerator pump controlled at the DC power
panel, or by pumping it using a shore side pump out station through the boat's side-deck pump
out fitting.
4P2: Head (Toilet)
The premium head is easy to use, odor free, and very reliable. It
works with a vacuum pump and vacuum accumulator tank. A vacuum is
maintained in the tank until the head is used, when the waste matter in
the bowl is sucked out of the head by the vacuum, then it is pumped
through the system by the head pump, which then also pumps up a
vacuum again. Note that it is this rush of the head’s contents caused by
the accumulated vacuum that is important to the head’s operation! This
sudden rush causes any solid material in the waste stream to be
shattered as it passes through the specially-shaped orifice in the bottom
of the head. For this reason, proper head operation requires that the head pedal not be held
down for long periods if time.
The head uses about a half pint of fresh water from the ship’s supply with each flush.
4P3: Head Operation
The head is operated by a the pedal to the left of the head base (as you face the head),
and operation is as follows:
1)
Before using the head if the waste will be solid, lift the pedal to add water to the
bowl;
2)
Use the head;
3)
Step on the pedal just long enough to hear the “whoosh” as the head is evacuated
and a small amount of water rinses the bowl - - - about five seconds!
4)
Releasing the pedal, if you wish to flush again, wait at least twenty seconds or so
(until you hear the head pump stop) before flushing again.
As the pedal is released, the ball-valve at the bottom of the head seals the head so that
the vacuum can be pumped up, when the pump will stop, and the head is again ready for use.
Section 4P: Head Systems 4.42