Centek 1200326 4 Inch Marine Exhaust Thru-Hull Fitting White with Flapper

The Centek 1200326 is a professional-grade marine exhaust thru-hull fitting designed to safely vent engine exhaust gases through the hull while preventing water backflow. This fitting is specifically engineered to impede water backflow into the exhaust system and engine when stopped, moving slowly or backing down, as reverse water flow can cause severe damage if it enters the engine.

Construction and Design:

• Constructed from compression molded fiberglass that will not corrode like conventional fittings made from bronze or stainless steel
• Made from flame retardant, fiberglass reinforced resin
• Features a weighted rubber flapper valve that helps prevent backflow of water
• Lloyd's Register Type Approval certified
• White gelcoat finish for clean appearance

Specifications:

• Fits 4 inch inside diameter exhaust hose
• Flange outer diameter: 6.00 inches
• Overall length: 7.75 inches
• Thru-hull shank length: 4.50 inches

This exhaust component is designed to work in conjunction with Centek Marine exhaust systems and to withstand harsh marine environments. The flapper valve is serviceable using Centek repair kit 1200340, which includes the rubber flapper, mounting screws, and flange plate.