Groco FF-1125 Full Flow Bronze Pipe to Hose Fitting, 1 Inch NPT x 1-1/8 Inch Hose ID

The Groco FF-1125 Full Flow Pipe to Hose Fitting is a straight-through adapter that converts a 1 inch NPT threaded pipe connection to a 1-1/8 inch ID hose barb, letting you transition cleanly from rigid plumbing to flexible marine hose without restricting flow. It is machined from C83600 bronze, a marine-grade alloy chosen for its resistance to corrosion in raw water and saltwater systems, making this fitting suitable for use on thru-hull plumbing, raw water intake and discharge lines, and other below-the-waterline or engine room connections where long-term reliability matters.

The fitting is UL Listed under UL 647B, the standard covering pipe fittings for marine and fuel/water applications, giving installers assurance it meets recognized safety criteria for use aboard boats. Its full-flow bore design is engineered to minimize pressure loss compared to reduced-bore fittings, which is important on raw water cooling, bilge, and washdown circuits where restricted flow can affect pump performance or engine cooling. One end threads directly onto standard 1 inch NPT pipe or fittings, while the barbed end is sized for 1-1/8 inch ID hose and is intended to be secured with appropriately sized hose clamps for a leak-free connection.

Specifications

• Brand: Groco
• Manufacturer Part Number: FF-1125
• Material: Bronze (C83600)
• Pipe Thread Size: 1 inch NPT
• Hose Barb Size: 1-1/8 inch Hose ID
• Connector Type: Barb
• Certification: UL Listed 647B
• Product Dimensions: 3 x 2 x 2 inches
• Weight: 0.3 pounds
• UPC: 742985141933

Fitment

This fitting is a universal 1 inch NPT to 1-1/8 inch hose adapter and is not restricted to a specific engine, drive, or boat model.

Frequently Asked Questions

What does the Groco FF-1125 fitting do? The Groco FF-1125 is a full flow pipe to hose fitting that converts a 1 inch NPT threaded pipe connection to a 1-1/8 inch ID hose barb, allowing rigid plumbing to transition to flexible hose without restricting flow.

What material is the FF-1125 made from? It is machined from C83600 bronze, a corrosion-resistant alloy commonly used in marine plumbing for durability in raw water and saltwater environments.

Is the FF-1125 UL listed? Yes, the Groco FF-1125 is UL Listed under UL 647B, the safety standard for marine pipe fittings.

What thread size does this fitting have? One end of the FF-1125 has a 1 inch NPT thread for connecting to standard pipe or fittings.

What size hose fits the barbed end? The barbed end of the FF-1125 is sized for 1-1/8 inch ID hose.

Does the FF-1125 come with hose clamps? No, the FF-1125 is the bronze fitting itself; hose clamps sized for a 1-1/8 inch ID hose should be purchased separately to secure the hose to the barb.

What are the dimensions of the FF-1125 fitting? The Groco FF-1125 measures 3 x 2 x 2 inches.

How much does the FF-1125 weigh? The FF-1125 weighs 0.3 pounds.

Will the FF-1125 work on a raw water cooling line? Yes, its full flow bore design minimizes pressure loss, making the FF-1125 suitable for raw water intake, discharge, and cooling line connections where flow restriction is a concern.

Is this fitting suitable for fuel systems? The FF-1125 is UL Listed under UL 647B, a standard that covers marine pipe fittings for fuel or water use, and is constructed of bronze for corrosion resistance.

Does the FF-1125 fit a specific boat model or engine? No, the Groco FF-1125 is a universal 1 inch NPT to 1-1/8 inch hose fitting and is not limited to a specific engine, drive, or boat model.

What is the UPC for the Groco FF-1125? The UPC for the Groco FF-1125 bronze pipe to hose fitting is 742985141933.