I installed the Whaler Gulper 320 in the area under the forward dining bench seat and used a remote pickup directly under the mast step. I wired in a Whale BE9006 electronic bilge switch with delay and have a three way ON - OFF - AUTO switch.
The combination works well. When there was a centrifugal pump doing the work without a check valve there was always water sloshing around. Now it is pretty dry. The discharge line still runs to the port stern and exits about 6" down from the toe rail. Despite the 320 GPH rating of the Gulper and the ~ 500 GPH rating on the previous pump I think the Gulper is pumping as well or better. One other advantage is that when Windburn is on the hard and covered I can use a wet / dry vac on the pickup line and get the bilge dry enough that I do not have to use antifreeze. Michael Brown Windburn C&C 30-1 From: Josh Muckley <muckl...@gmail.com> Check out a water witch switch. I had automatic Rule that "sensed" the presence of water every 2.5 minutes. It was so inconsistent about turning off that I ga e up and used it like a manual pump. The I think it was OEM but may have been the PO that wired the manual switch and a float switch in parallel. I can start the pump and pump it pretty close to dry when I'm there to do it. The rest of the time the float lifts up and starts the pump. I have a water witch switch that I've been meaning to install as well as a whale diaphragm pump. My discharge is very near to the water under the reversed transom. I like the concealed nature of the location but it necessitates a high point loop so that there is no chance of submerging the discharge and then siphoning back into the bilge. Since there is a high point of discharge tubing, every time the pump shuts off, the tubing drains back and partially refills the bilge. I installed a check valve but the centrifugal pumps still rely on having about 1/2 of water so no matter what my bilge is never dry. When my rule pump died I was in a pinch and it was late at night. Walmart was the only option so I got a normal starting (not automatic), attwood, I think it is the 800gph but it might be the 1200gph. It has lasted 4 seasons now. https://www.walmart.com/ip/Tsunami-800-GPH-Cartridge-Bilge-Pump-12VDC/11071214 The whale pump is a positive displacement diaphragm pump which is capable of self priming and can provide lift of up to 10 feet. In short it can nearly suck the bilge dry. I've had it in mind to install it such that after the centrifugal pump turns off to have the whale start and finish the job. The whale pump has at least 2 built in check valves, so the risk of drain back is pretty much eliminated AND it will pump air so it is effectively blowing down the lines dry. The only drawback is that it is pretty small on the capacity scale - 300 gph. http://www.whalepumps.com/marine/product.aspx?Category_ID=10008&Product_ID=10014&FriendlyID=Gulper-320 https://waterwitchinc.com/bilge-switches/ I also have provisions to use the shower dewatering pump and/or the engine raw water pump to suck out the bilge as well as the manual pump. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD
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