I open all drain valves and taps then with filling hose for aquaroll over tap fitted with car tyre valve other end held and sealed with hose clip (jubilee) . connect electric tyre pump to valve and switch on leave until no water out of drain. (can use foot pump but leave drain valve shut until you have 14/15 lb pressure showing on gauage then open drain valve, best on tap furthest away from drain) This is a bit awkward but can be done Toilet electric or manual pump unti loss of suction on flush, remove soil tank, remove drain plug on bottom of flush tank catch remainder of fluid in jam jar or tin, leave plug out to drain if any. Or you can blow down aqua hose if you have a good pair of lungs (IE opera singer) I always remove gun off garden hose and tap and blow down pipe until water stops draining gives your lungs a good exercise. As medically recommened better than blowing up balloons.
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Topic: Floe Drainage System
