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Old 08-13-2014, 01:20 PM
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67c&ccorv 67c&ccorv is offline
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Quote:
Originally Posted by tangaroa3 View Post
Thanks Jeff. I've wondered about that gate valve also.
When installed it is situated at the very bottom of the system...on the exhaust portion. My only guess is that it is there to drain any water out of the exhaust portion in the event of water packing in from the back of the system, such as a huge following sea or something. Also, if there is so much MMO from storage that gets pushed out the exhaust, this would be a means to drain it out. These are my guesses anyway.
The aft section is also heavy gauge copper. It really looks good.
There was also some funky rubber muffler flange between it and the thru hull exiting the transom. Should have took a picture of it. It's labeled 'Mini Muffler'. Seemed to serve as sort of a flexible coupling between the rigid exhaust and thru hull, and had flapper fingers (best way to describe) inside.
Will work on some sort of mild pressure/leak test.
Your system is very much like the original one in my 1967 C&C Corvette...the gate valve is for draining condensate and water that is pushed into the exhaust by following seas - it also acts as a surge chamber.

I replaced my bronze system with an MMI waterlift exhaust - worth every penny!

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