|It's the most wonderful time of the year! Docklines at the ready.|
|The angle is intentional: the waterlift muffler is not on the centreline. Blurriness unintentional.|
|Yes, skipper, there is something called a "flash". Seen on the right: the anti-siphon valve. Mine's a Vetus.|
I wanted to avoid complexity. Even though we sail in fresh water, I have had the "plunger and spring" part of the valve corrode and or stick shut and have had exhaust water back into the exhaust manifold, occasioning the dreaded "hydrolock" and extensive repairs and remediation. That's why I wanted to avoid the issue entirely: that's why, noting I already had an unusual starboard side exhaust, decided to go for a two-fer.
|The new, port-side exhaust outlet being welded into place.|
|It got warm.|
|Back to the bare metal. It won't be the only time: we're having the entire bottom redone in Nova Scotia.|
The idea was to dispense with the need for an anti-siphon loop at all. This installation means, in essence, that the area of the exhausts is effectively doubled (there's now two exhaust hoses, not one). This leads to less "back pressure"; the exhaust gases that propel themselves and the cooling water do not have to work as hard to get the mixture off the boat. The absence or negation of the anti-siphon circuit is compensated by the fact that the boat is nearly always heeled to some degree; the downward slope of one exhaust hose leaves the "windward" or "high side" hose open to the atmosphere, which allows the exhaust to exit properly.
|That "T" is as high as it can go at present, but if it needs to be higher, I can make a box for it to increase the slope of the exhaust hoses out of the boat via that removable plate. As I've mentioned, I've been thinking of this for some time.|
|About as neat a "bead" as I can manage in tight quarters.|
|Recycled copper strapping. I suspect the hot water heater will go in the 'blank space'.|
|The PSS "burp line" is better secured now.|
Just because I often get asked about costs, the four nipples (two drain, two exhaust) cost about C$400; the run of corrugated exhaust hose (about 3.5 metres) was about $180; the AWAB SS 44-51 size hose clamps were about $60 and the stainless steel ball valve and tailpieces were about $230. We will soon learn if this was a wise investment.