Size: 2-1/4" Lx 1-3/8" W

The hole opening is 5-1/4"L x 2-7/8"W

It indicates the contents level in the tank and controls the pump-out

Internal portion has 1/2" female N

Vetus NLP60 - Waterlock type NLP60 60 mm Dockside Receptacle Size: 2-1/4" Lx 1-3/8" WOur NLP waterlocks are of dual stage construction featuring upper and lower chambers with a horizontal partition plate and a riser tube through the centre. The installation of the exhaust system, even in confined engine spaces, is greatly simplifieddue to the 360 rotating top chamber and both inlet and outlet connectors. For optimum silencing of exhaust noise you can also use a VETUS muffler and gooseneck, after the waterlock. Type NLP60 has an