Gardening
Top 5 Trends Taking Over Gardens in 2026
Mar 16th 2026
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The PVC Expansion Repair Coupling (also known as a telescoping or compression coupling) is the ultimate problem-solver for damaged sprinkler lines and mainlines. Unlike standard couplings that require you to dig a large trench to flex the pipe, this unit features a telescoping body that slides open to bridge the gap. It is one of the most essential irrigation fittings for quick, professional repairs, saving you hours of labor.
Designed for use with Schedule 40 PVC pipe, this "quik-fix" fitting uses a double O-ring seal to ensure a leak-proof connection even under pressure. To install, simply cut out the damaged section, apply PVC Glue, and expand the coupling into place. It is the preferred choice for landscape contractors dealing with root intrusion, shovel damage, or freeze breaks.
Engineered for Schedule 40 PVC systems.
| Specification | Details |
|---|---|
| Product Type | PVC Expansion / Repair Coupling |
| Connection Method | Solvent Weld (Slip x Spigot) |
| Max Pressure | 150 PSI |
| Material | Schedule 40 PVC |
| Seal Type | Internal EPDM O-Rings |
| Manufacturer | NDS |
| MPN (1/2") | 118-05 |
| MPN (3/4") | 118-07 |
| MPN (1") | 118-10 |
| MPN (1 1/2") | 118-15 |
| MPN (2") | 118-20 |
Repair a leak in minutes without digging up the yard.
Step 1: Cut the Damaged Section
Identify the break and remove a section of the pipe. The removed section needs to be slightly longer than the compressed length of the coupling (consult the label for the exact "cut-out" length).
Step 2: Prepare the Ends
Clean both pipe ends. Deburr the edges to prevent damage to the internal O-rings. Apply Purple Primer to the pipe ends and the coupling sockets.
Step 3: Glue and Compress
Apply PVC Glue to the pipe ends and the inside of the coupling. Fully compress the telescoping coupling and slide it onto one side of the pipe.
Step 4: Expand and Set
Align the coupling with the other pipe end. Extend (telescope) the piston out so that the socket slides over the second pipe end. Hold firmly for 30-60 seconds to allow the solvent weld to set.
Ensure this part matches your pipe:
Everything you need for a permanent repair:
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