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Re: [Amel Yacht Owners] Diaphragm Bilge Pump failure.
Bill Kinney,toggle quoted messageShow quoted text
Thanks for giving your opinion on sizing bilge pumps, along with the list of pumps that you carry. I really like the idea of doing some testing to get some real world data before considering making any changes.
I am curious about the Rule 4000 centrifugal pump since according to the flow chart it is supposed to be able to lift as high as 27 ft. which I think is almost 12 psi? The pump also has a 2” discharge. http://www.strongmanpumps.com.au/wp-content/uploads/2017/02/Rule-Pump-Performance-Chart.jpg
My interest in this pump would be for dewatering and if installed it would be mounted well above the bottom of the sump and hopefully would never get wet. When time permits, I will do some of my own testing to simulate an installation in my Maramu with one of the 4000 GPH Rule pumps and will post what I find out. I would like to see a number above 30 GPM..we will see.
I am aware that the centrifugal pumps are rated at 0 head and with no hose and agree that this has no bearing on real life conditions.
One other factor that I have found which can greatly reduce the discharge of a pump more than expected is the type of house being used. The type that is heavily corrugated internally appears to reduce the flow by about half (visual observation of the stream as opposed to actual measurement) as compared to a smooth bore hose of similar diameter.
Assuming you are in Florida. I have a 12V Sealand T2 pump at my shop which is also in Florida that I would be glad to ship to you and cover the shipping on both ways if you would like to do a capacity test? I have not checked to see if the 12V version of this pump has different specs. than the 24V?
SV Sueno, Maramu #220