MAREX 375
73
by Nikl Design USER MANUAL
8.4 SEPTIC SYSTEM
The system should be empty during storage at freezing temperatures.
➢ Empty the toilet bowl and septic tank/blackwater tank for contents BEFORE lifting
the boat out of the water and refill one time with water before emptying again. Fill
with mixed anti-freeze.
➢ Use anti-freeze in the toilet and pump it through (use anti-freeze mixed with water,
pure anti-freeze can damage the seals).
➢ Control all hoses and couplings. Retighten the hose clamps. Keep all valves
open.
➢ Demount all hoses from all filters and pumps.
Drain the filter for the toilet water inlet.
CAUTION
Always mix anti-freeze with water. Pure anti-freeze will damage the system.
8.5 FRESHWATER SYSTEM
The freshwater system must be completely drained if the boat is exposed to
freezing temperature.
➢ Open all valves including the aft shower.
➢ Open all taps and run until empty.
➢ Close the pantry pump when the system only delivers air.
➢ Let all taps be open during the winter.
➢ Take off the shower handgrips.
➢ Empty the water tanks.
➢ Empty the hot water tank through the opening valve on the tank.
➢ Demount all hoses from all filters and pumps.
➢ Drain all filters:
• fresh water filter
• filter for the shower pump
CAUTION
The switch in the low end of the shower sump box will be damaged by frozen
water. The switch must be controlled and eventually demounted and tapped for
water.
8.6 ENGINE AND DRIVE
➢ See the enclosed engine’s and drive supplier’s user manual.
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