6.4.1 Maintenance of black and grey waters draining system

Component Maintenance Notes and precautions
Black and grey water tanks Rinse the tanks (at least every month) Have the tanks filled with clean water and drain them two or three times. To prevent the formation of bacteria and of bad smell, pour periodically a disinfectant into the toilet, sink and bidet drains.
CAUTION

Should deodorants or disinfectants be used, avoid abrasive substances or acids, because they could damage tubes and seals.

CAUTION

In case of need, break or pollution of the tanks, they can be replaced. Contact the RIVA Service Department.

MAINTENANCE

At least once a week check the correct operation:

  • of Toilets;
  • of the black water pump.

At least once every three months check the status of the tubes and connections.
At least once every six months protect with proper products:

  • of Toilets solenoid valves;
  • the black waters pump.

When necessary, at least once a year, carry out the accurate cleaning of the holding tank.
Pumps Replacement of impeller
and mechanical seal		 This is a complex operation and should only be undertaken by skilled personnel.
CAUTION

The electric motor may become hot when running (see manual of the electric pumps).
Pay attention. The electric pump must only be repaired by competent or qualified personnel, using manufacturer’s spares; if this procedure is not followed, the manufacturer is relieved of any responsibility and warranty is void and null.
Operation check and cleaning
(at least every month)		 Electric pumps usually do not need ordinary maintenance, as long as some precautions are taken, which extend their lives (address to the pumps’ Manufacturer).

DANGER

Before each intervention make sure that voltage is disconnected and that there is no possibility of accidental connection.

  • If there is a risk of freezing, it is necessary to empty the pump casing from the liquid and to fill it, before restarting the pump.
  • Make sure that the pump never runs dry.
  • The DC motor brushes must be periodically checked for consumption and spring pressure.
  • If the pump does not work for a long time, it is better to empty the pump casing and clean it.
  • If a strainer and a foot valve are installed, check periodically for their efficiency and cleaning.
  • Check that the impeller is jammed, this could cause heavy damages to the electric motor; if this happens, descale the impeller and pump body.
  • At least once a month, have the operation of the grey/black water pumps checked, having their tanks filled with clean water until the pump activates and having the correct overboard draining checked.

AFTER-SALES SERVICE BROCHURE