Well, I have not really had big problems with bilge pumps, but when the single
Rule 2000 got a bit long in the teeth and the hose started to get brittle, I ripped everything out and started with a clean sheet....
Installed a Rule 3700 GPH and a Rule 2000, both with separate wireing, separate panels
and separate Ultra Junior swithces.
Also ran new hoses, the white "sanitary" hoses for heads, not the thin plastic stuff they advertise as "Bilge Pump" hoses.
Double hose clamps all over and only 316SS.
One hose got a check valve as well as a generous loop, the other one got the big loop plus an anti-siphoning vent.
Been experimenting a bit with them valves, but due to the angle of the hoses and such, only a certain type of valve works.
The switch for the big pumps is located a few inches over the other one, so that the primary pump is the 2000, and if it can't keep up, the big one kicks in.
Also installed a red warning light for each pump in the cockpit
, so I can tell right away if something bad is going on.
Put 20 gallons of fresh water
in the bilge every month so each pump get a good work out...
The whole thing cost me about $700.00 plus a lot of swearing and swettin. (It is tight in the bilge of a CSY 33
, believe you me.)
Happy with the system.
Here is some good info on bilge pumps and where I lifted the ideas for the above system.;