See the connection
See how easily our grooved fittings come together.
Grooved ends, a gasket and a bolted coupling form a practical mechanical connection. Watch the actual assembly, from the separate fittings to the connected parts.
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Single-bolt & two-bolt options
We carry single-bolt and two-bolt push-on grooved couplings for straightforward assembly, without taking the coupling housing apart first.
Keep the parts together, bring the prepared grooved ends into position, then secure the connection using the product’s installation requirements.
Sold separately for additions and replacements. Purchase individual couplings and grooved fittings to expand an existing system or replace a component—no complete system purchase required.
Watch our assembly video ↑
A practical option for many standard aluminum air-piping installations. The push-on design keeps the housing together, while a single tightening point simplifies assembly.
We use two-bolt couplings where heavier pipe needs added support at the joint. The coupling and hanger arrangement are selected together to help support the pipe’s weight and keep the installation secure—all with the convenience of a push-on connection.
Single-bolt & two-bolt quick-fit couplings
Find the listed pressure rating for each coupling design and size.
These are coupling ratings. The complete system rating depends on the pipe, groove, gasket and other components, as well as temperature and service conditions. We confirm the suitable combination with your quote.
Discuss your size & application ↗| Nominal size | Single-bolt | Two-bolt |
|---|---|---|
| 1 inch | 450 psi | Contact us |
| 1-1/4 inch | 450 psi | 700 psi |
| 1-1/2 inch | 450 psi | 700 psi |
| 2 inch | 365 psi | 700 psi |
| 2-1/2 inch | 365 psi | 600 psi |
| 3 inch | 365 psi | 600 psi |
| 4 inch | 365 psi | 500 psi |
| 5 inch | 365 psi | Contact us |
| 6 inch | 365 psi | 450 psi |
| 8 inch | Contact us | 300 psi |
Both options are selected for your system’s working pressure. The specific coupling, pipe, groove and gasket determine the rating.
Compare finishes & coupling options ↓A closer look
The connection is mechanical: the coupling engages the grooves and holds the gasket around the joint. That straightforward design supports practical installation and future servicing.
Prepared grooves give the coupling a place to engage at each end of the connection.
The gasket surrounds the joint, while the coupling housing fits around it and engages the grooves.
Bolts and nuts secure the coupling. Use the fitting and coupling manufacturer’s assembly requirements for the specific products.
A product demonstration, rather than a complete installation guide. We help match the pipe, couplings and gaskets to your application and operating conditions.
Meet the fittings
A closer look at the grooved fittings shown in our assembly demonstration.
Match the connection to the job
Choose the coupling design to suit your pipe, application and supports. Pair it with grooved elbows, tees and other fittings to turn a corner, branch a line or connect equipment.
Couplings, elbows, tees and other grooved fittings are available separately for additions and replacement needs.
See the fittings come together ↑
Turn a pipe run using a grooved elbow.
Create a branch for another run or equipment connection.
Finish a run with a capped connection.
Easy to assemble. Practical to own.
Straightforward connections help make installation and later changes more manageable. Reliable, replaceable components keep routine maintenance practical as your system grows.
Explore the long-term value ↗Choose with confidence
We help match the connection and finish to the way your system will be used.
Talk through your options ↗Yes. We sell couplings and grooved fittings individually for system additions, expansions and replacements. You do not need to purchase a complete system. Share the part type, size and application so we can help match your existing system. Ask about individual parts ↗
For the same coupling model and gasket, red and black are finish choices, with the same specified pressure performance. Galvanized couplings add a protective zinc finish for enhanced corrosion resistance, making them a useful option for damp or more demanding environments. We help select the finish for the actual exposure, including any chemicals or washdown conditions.
Our listed single-bolt quick-fit coupling ratings are 450 psi for 1, 1-1/4 and 1-1/2 inch; and 365 psi for 2, 2-1/2, 3, 4, 5 and 6 inch.
These figures apply to the couplings, rather than the complete piping system. We confirm the pipe, groove, gasket, temperature and service conditions with your quote. Compare single-bolt and two-bolt ratings ↗
Our listed two-bolt quick-fit coupling ratings are 700 psi for 1-1/4, 1-1/2 and 2 inch; 600 psi for 2-1/2 and 3 inch; 500 psi for 4 inch; 450 psi for 6 inch; and 300 psi for 8 inch.
These figures apply to the couplings, rather than the complete piping system. We confirm the pipe, groove, gasket, temperature and service conditions with your quote. See the coupling size and pressure table ↗
Our listed single-bolt and two-bolt quick-fit coupling ratings differ by size and design. Use the rating for the specific coupling and nominal size; we confirm the pipe, groove, gasket and service conditions with your quote.
We choose the coupling around the pipe weight, required joint rigidity and how the system is hung and supported. Single-bolt couplings are often a practical choice for standard aluminum air systems. For heavier pipe, we use suitable two-bolt couplings to provide added joint support, with the hanger arrangement matched to the pipe weight and installation. Joint rigidity depends on the coupling design, rather than bolt count alone.
Our push-on grooved coupling options are designed to go onto prepared grooved pipe or fitting ends without dismantling the coupling housing first. Once positioned, the hardware is tightened to secure the joint. This keeps the parts together and simplifies assembly. Follow the specific product’s requirements for pipe preparation, gasket lubrication, positioning and tightening.
Let’s make the next connection