Although my exhaust plumbing never had one, based on some of your comments I am considering adding a shutoff ball valve between my waterlift muffler and above w/l thru hull. While under power the rump of the boat settles down with the outlet under water...not a problem with exhaust pressure. What I want to prevent is water entry in a following sea while sailing even though there is an adequate 18" rise (loop) between the outlet and the muffler. The question is that most ball valves have a much smaller ball orifice that will probably restrict exhaust flow. Would you recommend a larger 2 or 2-1/2" valve with reducing bushings back to 1-1/4".
It is a lot of pricey bronze hardware I would like to avoid if not necessary.
Your expertise would be appreciated..Thanks!
It is a lot of pricey bronze hardware I would like to avoid if not necessary.
Your expertise would be appreciated..Thanks!
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