View Full Version : Boat Heater fittings size

10-02-2012, 02:54 PM
I know the heatercraft lines are 5/8" for my model. I want to pick up the remainder of the fittings I need on the way home today but not sure what everything is.

I know the intake manifold uses the 1/2" MIP fittings. Is the fitting for the waterpump input the same size or is it smaller? I can't remember.

10-02-2012, 10:37 PM
Well my water pump is tapped for a 3/8" fitting just for future reference.