Pipe Sizes and Why They Are So Confusing

Catalina Direct, publishers of the Catalina 22 and Catalina 25 Owner

Quick Connect 15mm Female Tube x 1/2 Male Thread

Hose Barb Elbow, 5/8 x 1/2 NPSM

Thru-Hull 3/4, Mushroom, Threaded Bronze

Exhaust Flange Circular, B Series Engine

Fuel Tank 36 Gallon C-38

Water Pump, Late Sherwood 1/2

Exhaust Riser C-30 w/ 5411 Engine 81 <-> 85

Hose Barb Elbow, 1-1/2 x 1-1/2 NPSM

1-1/2 Ball Valve

Engine Heat Exchanger Zinc3/8 thread, 11/16 wrench

Seacock 3/4 Flush, 3/4 FPT