1-1/4 in. Galvanized Steel Coupling
1-1/4 in. Galvanized Steel Coupling
Sizes in This Series
Galvanized steel insert (barb x barb) couplings. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 1/2 in. | 973900 | $2.99 | Add to cart |
| 1-1/4 in. (this page) | 973903 | $7.99 | — |
Overview
The MPN 973903 is a 1-1/4 in. galvanized steel insert coupling with hose-barb ends on both sides. It joins two lengths of 1-1/4 in. hose or insert-grade poly pipe into a straight run without threads. The galvanized steel body resists corrosion and stands up to heavier service than a plastic insert.
Technical Specifications
| Part Number (MPN) | 973903 |
| Configuration | Insert Coupling (straight) |
| Size | 1-1/4 in. |
| Connection Type | Hose Barb x Hose Barb |
| Material | Galvanized Steel |
| Pressure Rating | 150 psi |
Materials of Construction
| Body | Steel |
| Finish | Hot-dipped galvanized (zinc) |
Typical Applications
Used to splice two lengths of 1-1/4 in. barb-insert hose or poly pipe in irrigation mains, water transfer, sump and drainage, agricultural, and general low-pressure fluid lines. The larger 1-1/4 in. bore suits higher-flow runs, and the galvanized finish holds up to outdoor and buried installs. Clamp each barb end for a secure, leak-resistant joint.
Cross-Reference and Interchange
This galvanized steel insert coupling cross-references to these competitor and industry part numbers: SCP 125, SIC-12. Replacing one of these? Match nominal size, barb configuration, and material, or send us your part number and we will confirm the interchange.
Sizing and Installation Resources
FAQ
What does an insert coupling do?
It joins two pieces of hose or insert-grade poly pipe end to end. Each side slips inside the hose and is secured with a clamp.
Is this threaded?
No. Both ends are hose barbs, so no thread sealant is needed—just slide on the hose and clamp.
Can it be buried or used outdoors?
Yes. The galvanized steel body resists corrosion better than plastic for outdoor and buried low-pressure lines.
What is the pressure rating?
Rated to 150 psi. Stay within the lower of the fitting, hose, and clamp ratings for your system.
⚠ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.