Forespar Marelon Full-Flow Seacock & 1-1/2" Mushroom Through-Hull - 904046ABYC

Forespar Marelon Full-Flow Seacock & 1-1/2" Mushroom Through-Hull - 904046ABYC

Upgrade your boat’s below-waterline plumbing with the Forespar Marelon Full-Flow Seacock & 1-1/2" Mushroom Through-Hull - 904046ABYC. Designed for reliable marine service, this seacock and through-hull combination provides a strong, corrosion-resistant solution for controlling water flow through the hull.

Constructed from Marelon®, Forespar’s high-strength, glass-reinforced composite material, this assembly eliminates the corrosion and electrolysis concerns associated with traditional metal through-hull fittings. Marelon is lightweight, non-conductive, and highly resistant to the harsh saltwater environment, making it an excellent choice for both powerboats and sailboats.

The full-flow seacock design helps minimize restriction through the plumbing system, while the included 1-1/2" mushroom through-hull fitting provides a streamlined exterior installation. The assembly is suitable for a variety of marine plumbing applications where a dependable below-waterline shutoff is required.

Key Features

• 1-1/2" marine seacock and mushroom through-hull assembly

• Manufactured from durable Marelon® glass-reinforced composite

• Excellent resistance to corrosion, electrolysis, and marine environments

• Non-metallic and non-conductive construction

• Full-flow design helps provide efficient water movement

• Positive shutoff for greater control of below-waterline plumbing

• Lightweight alternative to traditional bronze seacocks and through-hulls

• Designed for demanding freshwater and saltwater marine applications

• Ideal for new installations, refits, and replacement of existing through-hull plumbing

• Forespar quality construction for dependable onboard performance

What’s in the Box

• (1) Forespar Marelon Full-Flow Seacock
• (1) 1-1/2" Marelon Mushroom Through-Hull Fitting

Marine Applications

The Forespar 904046ABYC is an excellent choice for marine systems requiring a 1-1/2" through-hull connection and shutoff valve, including raw-water intake, sanitation, discharge, livewell, and other onboard plumbing systems, when appropriate for the specific installation.

Why Choose Marelon?

Unlike conventional metal fittings, Marelon does not suffer from galvanic corrosion and does not require bonding for protection against electrolysis. Its combination of strength, low weight, and corrosion resistance has made Marelon a popular material for marine through-hulls, valves, and seacocks.

Whether you're upgrading an aging plumbing system or outfitting a new vessel, the Forespar Marelon Full-Flow Seacock & 1-1/2" Mushroom Through-Hull - 904046ABYC delivers a durable, corrosion-resistant solution engineered for the marine environment.

Manufacturer: Forespar
Part Number: 904046ABYC
Type: Full-Flow Seacock with Mushroom Through-Hull
Connection Size: 1-1/2"
Material: Marelon® reinforced composite
Application: Marine through-hull plumbing