GROCO  |  SKU: GRO-IBVF-1500

GROCO IBVF NPS-to-NPT Flange Adapter

Regular price $129.99 CAD
VARIANT
Ships By Sat, August 22 Free Canada Shipping

Why Shop With Us

✔ Locally owned in Nanaimo, BC
✔ Trusted by boaters and anglers since 1986
✔ Knowledgeable staff with real on-the-water experience
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The GROCO IBVF NPS-to-NPT Flange Adapter provides a reliable marine‑grade transition between standard NPS thru‑hulls and NPT in‑line valves used as seacocks. Designed for marine plumbing and OEM installations, the IBVF adapter eliminates dangerous thread mismatches, creates a sturdy mounting base for valves, and simplifies future valve replacement and maintenance.

Key Features

  • Marine‑grade material: C83600 bronze construction (316 stainless available) for long‑term corrosion resistance in saltwater environments.
  • Compatibility: Accepts standard thru‑hulls and mates with GROCO IBV series in‑line valves for secure seacock assemblies.
  • Safety & fit: Eliminates thread mismatch and reduces risk of valve damage during engine or generator installation.
  • Serviceability: Simplifies maintenance and future valve replacement—OEM‑friendly design that allows valve installation later.

Boatbuilders, yards and marine technicians choose GROCO adapters to simplify installations and ensure a leak‑resistant, serviceable connection. The IBVF adapter is suitable for saltwater use and pairs with standard marine plumbing fittings; bonding attachment is compatible when used with GROCO in‑line valves. GROCO’s proven design reduces installation time and downtime for repair or replacement.

Available sizes include 3/4" (750), 1" (1000), 1‑1/4" (1250) and 1‑1/2" (1500). Packaged dimensions for the 1" bronze model are approximately 5 × 5 × 5 inches with a packaged weight of about 1.2 lb; larger sizes have slightly larger packaging and weights—see variant details for size‑specific packaged dimensions and estimated shipping weights.