GROCO 1.5-Inch Bronze NPS to NPT Flange Adapter

The GROCO 1-1/2" Bronze NPS to NPT Flange Adapter (IBVF) was developed to address several common problems in the marine industry, eliminating dangerous thread mismatch when in-line valves are screwed onto thru-hulls. It is designed for boaters who want an adapter accepting standard thru-hulls into the base and standard in-line valves on top.

This adapter provides a safe and sturdy assembly when in-line valves are used as seacocks, and for OEMs, it prevents valve damage during engine or generator installation since the valve can be installed later, simplifying future valve replacement. Browse more options in our thru-hulls, seacocks & strainers category.

Key Features

• 1-1/2"
• C83600 bronze
• prevents thread mismatch
• accepts standard thru-hulls and in-line valves
• Weight: 1.8 lb

Frequently Asked Questions

What problem does this adapter solve? Dangerous thread mismatch when in-line valves are screwed onto thru-hulls.

Can this adapter delay valve installation for OEMs? Yes, preventing valve damage during engine or generator installation.

What materials is this adapter available in? C83600 bronze, or #316 stainless steel.