Description
GROCO BB-2 Backing Block 1-1/4" & 1-1/2" Seacocks | Boat Supply Store
Address the critical need for a stable mounting platform when installing or replacing seacocks on your vessel. This backing block provides a 1/2" thick, rigid support structure utilizing marine-grade PVC foam that inherently resists moisture absorption and swelling. Its design allows it to conform to minor hull curvature, ensuring a superior seal for seacocks ranging from 1-1/4" to 1-1/2" diameters, essential for maintaining watertight integrity in offshore or coastal cruising applications.
Key Features
- Universal Fit for 1-1/4" and 1-1/2" seacocks
- Rigid Support via 1/2" thickness construction
- Adapts to Hull by conforming to minor curvature
- Resists Water Damage due to non-absorbent PVC foam
- Durable Material preventing swelling or degradation
- Environmentally Sound PVC foam composition
- Secure Installation through press-threaded brass inserts
- Reliable Sealing for watertight integrity
Specifications
| Product Specifications | |
|---|---|
| Backing block for | 1-1/4" and 1-1/2" seacocks |
| Features | Press-threaded brass inserts |
| Thickness | 1/2" |
| Material | Marine-grade PVC foam |
| Moisture Absorption | Does not absorb moisture |
Who This Is For
Marine boat owners and technicians requiring a robust and forgiving mounting solution for 1-1/4" and 1-1/2" seacocks. Ideal for ensuring a secure, watertight seal on various hull types where a reliable backing block is essential.
How It Compares
| Feature | GROCO BB-2 Backing Block 1-1/4" & 1-1/2" Seacocks | Competitor |
|---|---|---|
| Seacock Size Compatibility | 1-1/4" & 1-1/2" | Specific Perko models (not universally multi-size), 1" & 1-1/4" |
| Material | PVC foam | Nylon, PVC foam |
| Thickness | 1/2" | Approx. 1/2", 1/2" |
| Moisture Absorption | Does not absorb moisture | Likely resistant (Nylon), Does not absorb moisture |
| Hull Conformance | Conforms to minor curvature | Likely rigid, Conforms to minor curvature |
Common Concerns Answered
What if I have trouble finding specific seacock sizes for my older boat?
The GROCO BB-2 is specifically designed to accommodate both 1-1/4" and 1-1/2" seacock sizes, offering a versatile solution that often covers common and slightly less common installations, reducing sourcing difficulties for many boaters.
How can I ensure a proper seal around the backing block and hull?
The BB-2's PVC foam construction allows it to gently conform to minor hull curvatures, creating a more intimate fit. Always use appropriate marine sealant (sold separately) on both sides of the backing block during installation to guarantee a watertight seal.
Will this backing block work with seacock brands other than GROCO?
While designed with GROCO seacocks in mind, its universal sizing for 1-1/4" and 1-1/2" ports generally allows compatibility with other reputable seacock brands that utilize standard flange dimensions. Verify your seacock's mounting pattern against the BB-2's dimensions for optimal fit.
Frequently Asked Questions
What seacock sizes does the GROCO BB-2 backing block fit?
The GROCO BB-2 backing block is engineered to fit both 1-1/4 inch and 1-1/2 inch seacocks.
What material is the GROCO BB-2 backing block made from?
The backing block is constructed from marine-grade PVC foam, a material known for its durability and resistance to moisture absorption.
How thick is the GROCO BB-2 backing block?
The GROCO BB-2 backing block has a uniform thickness of 1/2 inch.
Can the GROCO BB-2 backing block be used on curved hulls?
Yes, the flexible nature of the PVC foam allows the GROCO BB-2 to conform to minor hull curvatures, facilitating a better fit and seal on non-flat surfaces.
Does the GROCO BB-2 backing block absorb moisture?
No, a key feature of the marine-grade PVC foam used in the GROCO BB-2 is that it does not absorb moisture, preventing degradation and maintaining structural integrity.
