Groco 90 Degree Bronze Pipe to Hose Adapter, 1-1/4 Inch NPT to Hose

This Groco pipe to hose adapter converts a 1-1/4 inch NPT pipe fitting to a 1-1/4 inch ID hose connection using a 90 degree sweep design that keeps water flow unrestricted through the bend. Built in cast bronze, the fitting is designed for use with plumbing systems that share the same hose inside diameter as the pipe thread, making it a straightforward way to transition between rigid pipe and flexible hose runs below the waterline or anywhere corrosion resistance matters.

A generous hex nut is cast directly into the body, giving installers a solid gripping surface for secure tightening with a wrench during installation, without needing a separate fitting or strap wrench. The hose barb end is sized with sufficient seating area to support double-clamping, which is the standard practice for any fitting located below the waterline or on a through-hull connection, helping prevent hose slippage and leaks over time. The 90 degree sweep configuration lets the adapter change direction in tight spaces while minimizing flow restriction compared to a sharp-angle elbow.

Part number PTHC-1250 is threaded with NPTHC (National Pipe Thread Hose Coupling) threads at the 1-1/4 inch size, making it suited for use with thru-hull fittings, strainers, and other bronze plumbing components in the same size range.

Specifications

• Brand: Groco
• Manufacturer Part Number: PTHC-1250
• Material: Cast Bronze
• Connector Type: Pipe to Hose Adapter
• Design: 90 Degree Sweep Elbow
• Thread Size: 1-1/4 inch
• Thread Type: NPTHC
• Hose Size: 1-1/4 inch inside diameter
• Weight: 0.69 pounds
• Item Dimensions: 6.25 x 6.25 x 2.5 inches
• UPC: 742985005013

Frequently Asked Questions

What does the PTHC-1250 adapter connect? PTHC-1250 converts a 1-1/4 inch NPT pipe thread to a 1-1/4 inch ID hose connection, letting you transition from rigid pipe to flexible hose in the same plumbing run.

Is this fitting bronze or plastic? The Groco PTHC-1250 adapter is made of cast bronze, not plastic, for corrosion resistance in marine plumbing applications.

Why is it called a 90 degree sweep design? The PTHC-1250 uses a sweep 90 degree bend rather than a sharp right-angle elbow, which allows water to flow through the turn with less restriction.

Can I double-clamp the hose end of this fitting? Yes, the PTHC-1250 has sufficient hose seating area to support double-clamping, which is recommended for below-waterline or through-hull connections.

What thread type does PTHC-1250 use? It uses NPTHC (National Pipe Thread Hose Coupling) threads sized at 1-1/4 inch.

Does the fitting have a built-in hex for tightening? A generous hex nut is cast into the body of the PTHC-1250, giving you a solid surface to grip with a wrench when tightening the fitting into place.

What are the dimensions of the PTHC-1250 adapter? The Groco PTHC-1250 measures 6.25 x 6.25 x 2.5 inches.

How much does this adapter weigh? The PTHC-1250 pipe to hose adapter weighs 0.69 pounds.

What hose size should I use with this adapter? Use hose with a 1-1/4 inch inside diameter, matching the same size as the pipe thread on the PTHC-1250.

Is this a straight or angled adapter? The PTHC-1250 is a 90 degree angled adapter, not a straight fitting, allowing it to change direction in a plumbing run.