Forespar

Forespar Pro Series Thru-Hull Plug Inline Valve Seacock

Item: #1834379 | Part Number: Not Selected
$66.99 - $215.96
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                    $66.99 - $215.96
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                    Description

                    The Forespar Pro Series Thru-Hull Plug Inline Valve Seacock delivers unmatched flexibility and reliability for marine plumbing below the waterline. Built from strong, lightweight Marelon® with a modular design, it can be configured as a seacock or inline valve to simplify installations and reduce plumbing complexity. ABYC-compliant, serviceable, and corrosion-free, it's a dependable choice for modern boat systems.

                    Image of : Forespar Pro Series Thru-Hull Plug Inline Valve Seacock Forespar Pro Series Thru-Hull Plug Inline Valve Seacock Item # 1834379

                    Description

                    With over 2500 possible configurations, Marelon® Pro Series valves offer unprecedented options for reducing the size and complexity of installations. Durable and lightweight, they can be configured with dual inputs or outputs, and used as seacocks or inline valves. This helps reduce the total amount of plumbing needed in most boat designs. Suitable for below the waterline use, every valve meets the strict ABYC requirements for marine plumbing.

                    Pro series valves can be specified as inline valves, seacocks, Y-valves and dual drains and all feature a three-part construction that enables their versatility and long-term maintainability. Each valve can be easily disassembled for cleaning, as well as to replace the O-rings - a necessary maintenance procedure in every valve on the market.

                    Features:

                    • Thru-hull plug on valve handle
                    • Lightweight, yet extremely strong injection-molded parts
                    • Flush or mushroom marelon thru-hull (model dependent)
                    • Complete freedom from electrolysis or reaction to any metals
                    • Outstanding operating temperature range (-22° to +176° F)
                    • Outstanding U.V. resistance
                    • Fully Modular construction can be custom tailored to any purpose
                    • Long term reliability and serviceability
                    • No bonding (electrical) required
                    • Can be used on aluminum, steel, wood or FRP hull forms
                    • Can be used with or on any metal fittings

                    Product Brochure

                    Installation Instructions

                    Dimensions Diagram

                    Part Numbers for Forespar Pro Series Thru-Hull Plug Inline Valve Seacock

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                    Reviews

                    Rated 1 out of 5 by from Well made but incorrectly marketed? The valve is well made but poorly marketed. Maybe I made a mistake? It says 1” which I thought meant 1” thru hull and 1” barb. Well the threaded section is 1.5” so I had to buy another one that fit.
                    Date published: 2026-04-16
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                    Questions

                    What does "dual drain" mean?

                    Asked by: Daniel-3N
                    Hello, Please see the image below for clarification.
                    Answered by: Upwind
                    Date published: 2026-03-11

                    Is this a bundle of two or some weird Siamese twin configuration? The photo is inconclusive.

                    Asked by: Chaff
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                    Forespar Pro Series Thru-Hull Plug Inline Valve Seacock
                    Total:
                    $66.99 - $215.96