Groco Seacock Back Block

GROCO Seacock Backing Block - Secure & Waterproof Marine Installation

Category: Boats and equipment
Subcategory: Accessories and parts

Ensure the absolute safety and structural integrity of your vessel with the GROCO Seacock Backing Block, the superior solution for mounting flanged seacocks. Engineered as a modern alternative to traditional wood blocks, this essential component eliminates common points of failure, providing a rock-solid, waterproof foundation for one of your boat´s most critical systems. By distributing the stress of the seacock and thru-hull fitting over a wider area of the hull, it prevents dangerous stress cracks and ensures a reliable, leak-free seal for years to come.

Flanged seacock installation is improved with the use of a backing block between the valve flange and the hull. This creates a stable, flat surface that guarantees a secure and lasting fit, giving you unparalleled peace of mind on the water.

Key Benefits:

* Ultimate Durability: Unlike wood, this advanced backing block is completely impervious to moisture. It will not swell, rot, crack, or delaminate over time, even in the harshest marine environments. This eliminates the need for periodic replacement and protects the integrity of your hull.
* Enhanced Safety: Provides a solid, stable mounting surface that evenly distributes the load from the seacock flange. This significantly reduces point-loading on the fiberglass hull, preventing flexing and the formation of gelcoat spider cracks that can lead to water intrusion.
* Simplified & Versatile Installation: Designed for maximum efficiency, each size fits multiple seacock sizes, reducing the need for multiple parts. The pre-configured hole patterns and included threaded inserts make for a fast, clean, and professional installation without the time-consuming process of cutting, shaping, and sealing a wooden block.
* Adaptable Design: The specific thickness provides the perfect balance of rigidity and flexibility. It is strong enough for a secure installation but pliable enough to conform to minor hull curvature, ensuring a perfect, gap-free fit every time.

Main Features:

* Engineered with an advanced, high-density material designed for marine use.
* Features a versatile, multi-size bolt pattern to accommodate a range of GROCO flanged seacocks.
* Includes high-quality press-in threaded inserts for a secure bolt connection.
* Precision-engineered thickness for optimal strength and flexibility against the hull.

Installation is expertly streamlined: simply press the supplied threaded inserts into the holes on the hull side of the backing block that precisely match your seacock flange. This creates a robust, permanent mounting system.

Technical Specifications:

* Attribute: Blockers
* Thickness: 1/2" (12.7mm)
* Material Property: Will not swell or absorb moisture. Impervious to rot and decay.
* Model BB-1: Fits 3/4" and 1" GROCO Seacocks (FBV-750, FBV-1000) and Flanged Adapters (IBVF-750, IBVF-1000).
* Model BB-2: Fits 1-1/4" and 1-1/2" GROCO Seacocks (FBV-1250, FBV-1500) and Flanged Adapters (IBVF-1250, IBVF-1500).
* Model BB-3: Fits 2" GROCO Seacocks (FBV-2000) and Flanged Adapters (IBVF-2000).

Upgrade your boat’s plumbing with the professional standard in seacock installation. The GROCO Seacock Backing Block is not just a part; it’s an investment in reliability, safety, and long-term performance for your vessel