Maintenance Of Blackwater Tank - BENETEAU SWIFT TRAWLER 47 Owner's Manual

3)

Maintenance of blackwater tank

- The risk of unpleasant odours forming increases when the waste water remains in the tank for a long time.
- Whenever possible empty the tank regularly, even before it is full.
- Every time the tank is emptied put in about 5 litres of fresh water and add an appropriate detergent additive (available
from chandleries). A very simple method is to add soda salts, which clean and disinfect at the same time.
- Before winterising, flush the tank with copious amounts of fresh water filling it through the 'WASTE' deck connection.
Leave at least 5 litres of fresh water mixed with a detergent additive.
- Disinfecting: Disinfect the tank once a year by filling it with a solution of Javel water (1 to 1000).
4) Using the drainage valve
- The direct-to-sea drainage valve can be sealed by means of the drilled hole on the handle.
- To lock the drainage valve in the closed position: Pass the tightening collar around the drainage valve and feed through
the hole in the handle as shown.
197885 RCD-2
Index B
185
Never use automobile anti-freeze in the
blackwater system: risk of poisoning.
Respect local regulations regarding the
emptying of blackwater tanks.
- Beware of any unintentional draining.
12 12