Looks like it would also serve indicate the efficiency of the pump too. If
the pump lost a vane or developed excessive wear the discharge pressure
would drop and so would the water in the column.
Philip
At 12:07 PM 2/5/2008, you wrote:
While Ann-Marie's anti-siphon technique is excellent, I have an even
simpler method I use on my genset raw water.
I attached a small ID, 1/4" or 3/16", whatever fits, plastic hose to the
siphon valve fitting, after removing the valve's guts, and lead it to the
bilge with a big loop going as high as I can get it.
When the pump is running the water rises in the loop but there is not
enough pressure to push it over the top of the loop. When the pump stops
all the water falls out. If for some reason the pressure with the pump on
pushes the water over the hill it goes harmlessly into the bilge and the
flow is limited by the small plastic hose.
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