The Schedule 40 PVC Reducing Coupling is the standard solution for connecting two different sizes of PVC pipe in a straight line. Featuring a **Slip x Slip** configuration, this fitting joins a larger pipe directly to a smaller pipe using a permanent solvent weld. It is one of the most essential irrigation fittings for stepping down mainline sizes to zone lines or adapting flow requirements near irrigation valves.
Manufactured by Dura Plastics from high-quality Schedule 40 PVC, these couplers are designed to withstand high pressure and harsh underground environments. Unlike threaded bushings that can restrict flow or require tape, this coupling provides a smooth, leak-proof internal transition that minimizes turbulence and friction loss.
Identify the correct part number for your reduction needs.
| Specification | Details |
|---|---|
| Product Type | Reducing Coupling |
| Connection Type | Slip x Slip (Fits OVER pipe on both ends) |
| Material | Schedule 40 PVC (White) |
| Standards | ASTM D-2466, NSF Certified |
| Common MPNs |
3/4" x 1/2": 429-101 1" x 1/2": 429-130 1" x 3/4": 429-131 1-1/2" x 1-1/4": 429-212 |
Secure connections require proper solvent welding.
Step 1: Prep the Pipe
Cut both pipes square and deburr the ends. Clean the outside of the pipes and the inside of the coupling sockets to remove dirt and moisture.
Step 2: Prime
Apply Purple Primer to the outside of both pipe ends and the inside of the coupling hubs. This softens the PVC for a strong bond.
Step 3: Glue
While the primer is wet, apply PVC Glue to the pipe and the fitting socket.
Step 4: Connect
Push the pipe fully into the coupling with a quarter-turn twist to distribute the cement. Hold for 30 seconds. Repeat for the other side.
Ensure this fits your application:
Don't forget these essentials for installation:
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