Centek 1200325 4" Marine Exhaust Thru-Hull Fitting with Flapper Black

The Centek 1200325 is a transom-mounted exhaust thru-hull fitting constructed from black glass reinforced plastic (GRP), the same durable material used throughout Centek's wet exhaust system components. This compression-molded fiberglass fitting will not corrode like conventional fittings made from bronze or stainless steel, ensuring long-lasting performance in harsh marine environments.

Key Features:

• Designed for 4-inch (102mm) marine exhaust hose connections
• Integrated weighted rubber flapper valve prevents water from entering the exhaust line when moving slowly or stopped, while allowing exhaust fumes and cooling water to exit normally
• Features a longer lip at the bottom to help steer water away from the transom, avoiding unsightly water marks
• Overall length of 7-3/4 inches
• Lloyd's Register Type Approval certified
• Black color maintains appearance without fading or discoloration

This thru-hull outlet serves as the final component of the marine exhaust system and is designed to integrate seamlessly with other Centek mufflers, waterlocks, and exhaust components. The lightweight yet strong GRP construction makes installation easier while providing superior corrosion resistance compared to metal fittings.

Note: Replacement flapper kit (Part# 1200340) is available exclusively for Centek 4-inch exhaust thru-hulls.