Roger Long wrote:
Although, if the pump diaphragm is starting to leak air on the back
stroke, wouldn't air bubbles or froth start to show up in the water
stream? I haven't seen any yet.

Nope...and you won't. 'Cuz it's not PULLING any air into the line, it's
just a slight air leak that breaks the prime.



--
Peggie
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Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://shop.sailboatowners.com/books...ku=90&cat=1304