Groco TH4000W 4" Bronze Thru-Hull Fitting with Nut

The Groco TH4000W is a 4-inch bronze thru-hull fitting designed for reliable below-waterline installations on marine vessels. Constructed from durable bronze material, this fitting provides corrosion resistance for long-lasting performance in saltwater and freshwater environments.

Key Features:

• 4-inch diameter bronze thru-hull fitting
• Threaded design for secure seacock or valve connection
• Includes mounting nut for installation
• Corrosion-resistant bronze construction
• Suitable for marine applications including engine cooling, livewell systems, and bilge pump intakes

Installation Notes:

• Threaded portion should be cut to proper length based on hull thickness and backing block dimensions
• Consider thread depth requirements when connecting to seacocks or valves
• Marine sealant recommended between hull and thru-hull flange for watertight seal
• Professional installation recommended for below-waterline fittings

Important: Not approved for potable water systems. This fitting is intended for raw water applications only.

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.