Pump-out Pipe

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captrigney

Senior Member
Joined
Sep 22, 2012
Messages
177
Location
USA
Vessel Name
Meander
Vessel Make
1983 Grand Banks 36 Classic
How far off the bottom of the holding tank should pump-out pipe be and should it be cut at a 90 or another angle?
 
At the very bottom of the tank and a small air vent at the top. I would not use a fiting just the natural bend of the hose.
 
When I installed a new Dometic tank a few years ago it had a pretty neat design for the diptube. They used a 30 degree elbow near the bottom and then put a short length of pipe with a large chamfer on it . This allowed more open pipe area and still drained the tank to a reasonably low level without plugging.

I'll see if I can dig up a picture.

A square cut tube close to the bottom may plug easily, or leave "solids" :eek: in the tank.
 

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Is the intake cut on the top or bottom of the "chamfer" piece?
 

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