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post #5 of Old 05-26-2013
Stu Jackson
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Re: Diameter of Diesel Water Exhaust Pipe

What's the connection size at the heater? That's the size I'd use, and only make it smaller to connect at the engine. For freshwater cooled (i.e., heat exchanger) engines, the take off for the heaters is usually at/below the thermostat and back to the freshwater coolant pump, and NOT on one of the lines to the HX.

Stu Jackson, Catalina 34, 1986, M25 engine, Rocna 10 (22#), Maple Bay, BC, Canada
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