Groco IBV-F Bronze Flanged Adaptor For In-line Ball Valve to Thru-Hull
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Groco IBV-F Bronze Flanged Adaptor (34-IBVF1250) is designed to let a standard in-line ball valve connect correctly to a thru-hull while helping avoid dangerous thread mismatch and supporting a safe, sturdy assembly for seacock-style installations. This specific product includes an explicit note that it must not be used in potable water systems.
Key Features
- Bronze flanged adaptor for connecting an in-line ball valve to a thru-hull
- Designed to eliminate dangerous thread mismatch between thru-hulls and in-line valves
- Accepts standard thru-hulls into the base and standard in-line valves on top
- Helps provide a safe, sturdy assembly when in-line valves are used as seacocks
- For OEM installations, the adaptor concept helps prevent valve damage during engine/generator installation (valve can be installed later)
- Instruction note on this item: NOT TO BE USED IN POTABLE WATER SYSTEMS
Intended Use
- Marine thru-hull and in-line ball valve installations (seacock-style applications)
- General plumbing and seacock setups where an in-line ball valve needs a correct thru-hull connection
Product Details
- Product: Groco IBV-F Bronze Flanged Adaptor For In-line Ball Valve to Thru-Hull
- Model/SKU on this listing: 34-IBVF1250
- Material: Bronze (Groco C83600 per manufacturer series info)
- Intended thread concept (series): bottom uses straight NPS threads to mate with thru-hulls; top uses tapered NPT threads to mate with in-line ball valves ([groco.net](https://www.groco.net/products/fittings/thru-hull-fittings/ibvf-flange-adaptor?utm_source=openai))
- Size for IBVF-1250 family (matches 34-IBVF1250 in the series listing): 1-1/4" top NPT and 1-1/4" bottom NPS ([groco.net](https://www.groco.net/products/fittings/thru-hull-fittings/ibvf-flange-adaptor?utm_source=openai))
- Package/Weight data from listing: 544 grams (variant weight)
- Safety/usage instruction from this listing: NOT TO BE USED IN POTABLE WATER SYSTEMS.
Parts Desk Insights
Best Use Case: Use this adaptor when you want a correct, robust interface between a NPS-threaded thru-hull fitting and an NPT-threaded in-line ball valve—especially in seacock-style installations where installation fit and future serviceability matter.
Common Issues: Double-check the thru-hull thread type (NPS) and the in-line valve thread type (NPT) before final assembly to ensure you’re mating the correct connection sides. Also confirm the mating surfaces and any required related seals/gaskets per your thru-hull and valve setup diagram before installing.
Related Products & Accessories
- Valves & Strainers - Browse the Valves & Strainers category for compatible Groco in-line ball valves and related components.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.