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Old 09-22-2014, 07:52 PM   #1
City: Tuckerton, NJ
Country: USA
Vessel Model: 36 Gulstar MarkII
Join Date: Mar 2011
Posts: 938
1976 Gulfstar 36 MarkII water plumbing size

My Gulfstar 36 Mark II has all copper hoses and fittings in the freshwater system. Can anyone tell me which size piping is used in the fresh water system? I need to replace the freshwater pump with a new Jabsco VFLOW 5.0 and the copper looks smaller than the smallest sized adapters that came with the new freshwater pump. Does anyone have any ideas how to install the new freshwater pump on the old Copper lines? The boat is 120 miles away and I want to fix the freshwater system before I take the boat on it's trip to Little Egg, NJ. from the Middle River, Maryland.
Any help or ideas would be appreciated.

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Old 09-24-2014, 12:32 PM   #2
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City: Palm Springs CA
Country: USA
Vessel Name: On The Rocks
Vessel Model: Gulf Star MKII
Join Date: Apr 2012
Posts: 109
Mine was 3/8. There was a brass fitting 3/8 to 1/2 where it connected to the pump. I've pulled it all out and replaced with 1/2" PEX. Much better water flow 😄
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