(This is a Swedish Johnson water pump, comparable and compatible to Jabsco. the O-rings aren't needed for this pump). The label says 'don't run dry'. The cover nuts are 7mm stainless steel. The Hosetails are 3/4" BSPT(T=Tapering)(The original large-bore Hosetails are BSPP)(P=parallel).I have not changed the seals, which look to be in excellent condition.
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