T&T: Air Conditioner "Draining" Down

[Pascal Gademer]

normally if the hose runs uphill from the seacock/strainer to the pump 
inlet, with no high/low point, it should self prime and not loose its prime. 
the only times i've had issues were if there were high points in the line.

usually loosing prime only happens when the boat is hauled out, is your 
thruhull forward on the hull where it could get air underway ?  kinda odd on 
a trawler !

i woudln't use a check valve... chances are sooner or later a barnacle or 
debris will get in there and jam it.

pascal
miami, fl

----- Original Message ----- 
From: <Flatsflyer at aol.com>
To: <trawlers-and-trawlering at lists.samurai.com>
Sent: Wednesday, September 26, 2007 4:35 PM
Subject: T&T: Air Conditioner "Draining" Down


> Every time I take my Trawler out from the dock, I loose prime on my AC 
> pump.
> Should there be some type of a check valve that prevents the drain down. 
> Some
> times the AC pump will not pickup prime when I dock, then I have to prime 
> it
> manually. The AC pump is about 8" below the waterline, one pump supplies 
> both
> AC units. Any suggestions would be appreciated. I've looked for a check 
> valve
> but haven't found one.
>
> Thanks,
>
>
>
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