The curly- que would be a loop in the outlet hose to keep water from easily entering through the outlet and flowing down to the pump/bilge. I think the issue with a pump of this type, based on what Rule says, is that it never has what we might consider to be the classic 'Prime' that we'd see with a vane or piston type pump. The extra clearance between the pump's impeller and the housing is such that it can't stop water from backing out when it's not operating. I suppose building an improvised add-on housing/inlet with a check valve would do the trick (unless the boat goes upside down and the water drains out the thru-hull fitting, leaving the pump without any water to push)- but I think the suggestion from the pump manufacturer to remove the check valve and add a loop to the outlet hose would be much simpler and less time consuming. It would depend on the pump being used I suppose, there may be some out there that would be quite easy to add a check valve to . The pump I have would not , I'll go with the loop solution. Thx again, Don *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************
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