Description
GROCO BB-3 Backing Block for 2-1/2" Seacocks | Boat Supply Store
This backing block ensures a robust and watertight installation for 2" and 2-1/2" GROCO seacocks, critical for maintaining hull integrity. Constructed from 1/2" thick marine-grade PVC foam, it offers superior moisture impermeability and resists swelling, a vital characteristic for saltwater environments common in the Gulf of Mexico. The material's inherent flexibility allows it to conform to minor hull curvatures, preventing stress points during installation and use.
Key Features
- Secure Fit for 2" and 2-1/2" seacocks
- Rigid 1/2" thickness for structural support
- Conforms to minor hull curvature for optimal sealing
- Impervious to moisture, preventing water ingress and swelling
- Durable PVC foam construction for long-term marine use
- Reliable press-threaded brass inserts ensure secure fastening
- Environmentally friendly material choice
- Water-resistant design for demanding marine conditions
Specifications
| Product Specifications | |
|---|---|
| Backing block for seacocks | 2" & 2-1/2" |
| Thickness | 1/2" |
| Material | Marine-grade PVC foam |
| Inserts | Press-threaded brass |
| Moisture Absorption | Does not swell or absorb moisture |
| Hull Conformity | Conforms to minor hull curvature |
Who This Is For
Ideal for boat owners and professional marine technicians requiring a durable, moisture-resistant mounting solution for larger diameter seacocks on fiberglass or cored hulls. Ensures a reliable installation that adapts to hull contours without compromising structural integrity.
How It Compares
| Feature | GROCO BB-3 Backing Block for 2-1/2" Seacocks | Competitor |
|---|---|---|
| Seacock Size Compatibility | 2" & 2-1/2" | — |
| Thickness | 1/2" | 1/2", 3/4" |
| Material | PVC foam | Closed-cell foam, High-density foam |
| Moisture Absorption | No | No, No |
Common Concerns Answered
Are the brass inserts difficult to install?
The press-threaded brass inserts require sufficient force for installation, necessitating careful alignment and basic marine plumbing tools. Proper technique ensures a secure, long-lasting fit.
Will this backing block fit older seacocks?
The BB-3 is designed for standard 2" and 2-1/2" seacocks. While compatibility with all older or non-standard models is not guaranteed, it fits the most common sizes.
Can this backing block be used on very curved hulls?
While the BB-3 is designed to conform to minor hull curvature, significant or sharp angles may require additional consideration or alternative mounting methods to ensure a proper seal.
Frequently Asked Questions
What seacock sizes does the GROCO BB-3 backing block fit?
The GROCO BB-3 backing block is specifically designed to fit 2" and 2-1/2" seacocks.
What material is the GROCO BB-3 backing block made from?
The GROCO BB-3 backing block is constructed from marine-grade PVC foam.
How thick is the GROCO BB-3 backing block?
The GROCO BB-3 backing block has a rigid thickness of 1/2 inch.
Can the GROCO BB-3 backing block be used on curved hulls?
Yes, the GROCO BB-3 backing block is designed to be flexible enough to conform to minor hull curvature, ensuring a better seal.
Does the GROCO BB-3 backing block absorb moisture?
No, the marine-grade PVC foam construction of the GROCO BB-3 backing block is designed to not swell or absorb moisture.
