6
110115.05
Introduction
These instructions apply to the Vetus rigid plastic waste water
tanks for
grey water
and
black water
.
Grey water tank
A grey water tank should only be used for collecting water from
the sink, shower, wash basin, air conditioning, etc..
The capacity of a waste water tank can never be too large.
Match the capacity to the amount of fresh water available; the
capacity of the water tank(s).
Fit sink, shower, wash basin, etc. with a drain with sieve, so that
coarse waste, such as hair etc., will be less likely to enter the
grey water tank.
Black water tank
A
black water tank
is used only for temporary collecting toilet
waste.
A
black water tank
should be installed in accordance withe
the European Guidelines for Pleasure Boats (EGPB), ISO 8099
Standard.
The capacity of a waste water tank can never be too great. The
capacity should be calculated using the amount of flushing
water (outside water) used by the toilet. Reckon on 7 to 14 litres
(1.5 to 3 Imp. gal, 1.8 to 3.6 US gal) of black water per person
per day.
Use only water-soluble toilet paper to prevent unnecessary
blockages. N.B: Sanitary towels and tampons in the toilet and
black water tank will certainly cause blockages.
Clearing a blockage is an unpleasant job, make sure you have a
pair of rubber gloves on board.
Smell
Grey water tank
Unpleasant odours will be produced in every grey water tank.
Fit the sink, shower, wash basin, etc., with an S-bend (siphon
or stink trap) and a plug.
Black water tank
Unpleasant smells caused by faeces will be produced in every
blackwater tank. The use of
sea
water for flushing will increase
the smell. The algae in sea water also produce unpleasant
smells.
It is possible to add special additives to waste water tanks
to reduce the smell, called tank deodorants. A simple way of
reducing the smell is by using washing soda, which cleans and
sterilizes.
Leaking hoses, hose fittings, tanks, tank covers, etc., can also
cause a smell nuisance. So carry out a regular check of the
whole system.
For dimensions, see drawing on page 30. Tolerances of +/- 2%
apply to all tank dimensions!
Running dry of the pump is allowed. However, unnecessary
running dry will shorten the service life of both the motor and
the diaphragm.
Always shut off all sea cocks when leaving the ship.
WARNING
Obstructions in pressure and/or suction hose may be
harmful to pump and/or electric motor.
By using a fuse with the recommended amperage (6 A for
12 Volt and 4 A for 24 Volt) in the plus cable, the fuse will
blow if there are any blockages or when the outboard shut-
off valve is closed.
This will prevent damage to the pump or electric motor.
Use
Emptying
Always empty the tank in accordance with environmen-
tal regulations.
There are some regions where direct discharges into
the outside water are forbidden.
The longer waste water remains in the tank, the greater the risk
of smell. SO do not leave a waste water tank full unnecessarily.
Pump the tank empty once a day, or whenever possible.
The tank can be pumped empty in two ways:
- A ‘pump-out’ system on the jetty is connected to the tank
cap. This will empty the tank out.
- The tank pump can be used for directly pumping out waste
water overboard,
provided it is lawful to do so
.
The pump has a bore of ø 38 mm (1
1
/
2
").
When the tank is pumped empty by a high capacity pump, there
is a risk of the tank collapsing due to the under-pressure. This
problem occurs especially with ‘pump-out systems’. In order to
prevent the tank collapsing, one of the following measures can
be taken:
- Open the tank inspection cover.
- Open a valve specially fitted in the tank for this purpose.
- Install a vacuum operated vent valve VRF56.
- Install a 38 mm dia. ventilation pipe.
After pumping the tank empty:
Rinse the tank with clean water, so that all the discharge hoses
are filled with clean water. Pump the flush water away by switch-
ing on the pump; remaining contaminants in pump and hoses
will also be flushed.
Contaminants left behind in the valves of the pump this may
result in a decreased capacity of the pump.
If the installation is not used for a longer period of time, the
pump must be operated regularly. By doing so a proper func-
tioning of the valves is ensured.
During your absence
Flush the toilet several times to ensure the hose linking the toilet
and the tank is filled with clean water to avoid smells when not
in use.
Clean and sterilize the tank and pipes at least once a year, pref-
erably at the end of the season.
Cleaning
Grey water tank
Clean the inside of the tank with water and a good degreasing
household cleaner. Use a brush or sponge on a rigid tank.
Rinse the tank with clean tap water.
Black water tank
Clean the inside of the tank with water and a good toilet
cleaner, use household vinegar when there are scale depos-
its. Use a brush or sponge on a rigid tank. Rinse the tank with
clean tap water.
Sterilizing
Sterilize the tank by filling with a solution of chlorine bleach
in water (1 : 1000). Allow this solution to circulate through the
waste water system. Remove the solution and rinse tank with
clean tap water.
Summary of Contents for WWS120..B Series
Page 32: ......
