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Old 02-18-2020, 07:27 PM   #22
Southern Boater
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City: Tasmania
Vessel Model: Sea Ranger 46
Join Date: Sep 2019
Posts: 426
Quote:
Originally Posted by TWedd View Post
Spitting and coughing doesn't sound like a pump problem. Sounds like it is getting air. if the pump has a leak in the housing it could a pump problem, although you said it runs fine with one tank isolated. Concentrate on the tank and lines that the problem shows up with. If the the lines are allowing it to suck air when running, they will most likely be leaking water when off. If a visual inspection of the lines is not possible, then maybe try a temporary line. This will be the lines between the pump and tank. Also, check the valves, often valves will leak at the packing when open but not when closed, or vice versa. If the tank has a dip tube from the top then the dip tube is suspect, especially if it starts coughing and spitting when 2/3 full.
Thanks for the reply TW, you have raised some good points, I will check the lines forward of the tanks, all easily accessed. A deck wash pump has been grafted into the fw supply line right near the house supply pump, so maybe there is a leak around there?
Although as mentioned, a cleaner flow resulted from isolating each tank
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