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From: Arild Jensen (no email)
Date: Thu Nov 03 2005 - 21:14:12 EST
Neal asked:
-----Original Message-----
What's the most effective and convenient way to prime 100 foot of hose
that is routed through the boat?
I have some air in the hoses. I suspect there is air trapped at the pump
area. So the pump is not moving the fluid.
This hose obviously is not level, it goes through cabinets, so there are
low and high levels throughout the boat.. Towards the end of the hose
loop is an expansion tank that does allow air to bubble out of the
system. Also, some of the heater registers (fan units) do have bleeding
nozzles.
REPLY
The circulating pump is a non contact impeller type.
If the bleeder valves at the heat registers do not allow you to bleed
the whole system then use a displacement pump, even one of the dinghy
bailer pumps fitted with hose barbs. The drill motor mounted pumps are
also effective since they also have a positive seal- vane to case.
Evidently the original installer failed to observe proper orientation
and slope of the various units. Normally you should leave the heater
cores as the high points and the hoses drooping in between. That way you
know the bleeder valves constitute the high points and after bleeding
these the whole system is pretty well primed and ready to go.
Unless the pump is mounted as a high point it likely isn't the location
of the air lock. Been there done that, more than a few times.
Arild
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