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Old 05-21-2018, 06:50 AM   #13
Roger Long
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City: Albany, NY
Vessel Name: Gypsy Star
Vessel Model: Gulf Star 43
Join Date: Jul 2015
Posts: 451
This is what the vent looks like if it is a Forespar fitting:




BTW, the joker valve fits in a 1/4" compression fitting like it was made for it. I've made my own vac breakers for fuel polishing system header tanks and bilge lines where I didn't want to use the whole Forespar return bend. You can buy just the cap and valve from West Marine or Forespar.

I have also used the Forespar vented loop on a head line for neat appearance but didn't need, or want, the vac breaker function so I just replaced the valve with a small disk of thick rubber gasket material.
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