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When a pipe run changes diameter or transitions between schedule ratings, a loose or mismatched fitting can mean leaks, pressure loss, and costly rework. These dark PVC transitional socket adhesive fittings are designed for DIYers, plumbers, and irrigation installers who need a dependable solvent-weld slip joint that holds under pressure without special tools.
Each fitting is molded from rigid dark PVC (polyvinyl chloride) and accepts standard solvent cement for a permanent, watertight bond. Available in six sizes spanning 20 mm (approx. ¾") through 63 mm (approx. 2"), with socket depths typically ranging from 20 mm to 63 mm to match the pipe OD. Wall thickness is proportional to pipe diameter and conforms to standard schedule ratings.
Typical applications include residential and commercial irrigation lateral lines, above-ground and below-ground drainage runs, pool and spa plumbing transitions, and workshop compressed-air distribution where a schedule-to-schedule diameter change is required.
| Material | Rigid PVC (Polyvinyl Chloride) |
|---|---|
| Color / Finish | Dark (UV-inhibited pigment) |
| Connection Type | Solvent-weld slip socket (adhesive) |
| Available Sizes | 20 mm, 25 mm, 32 mm, 40 mm, 50 mm, 63 mm |
| Approximate Inch Equivalents | ¾", 1", 1¼", 1½", 2" (nominal) |
| Socket Depth | See variant options |
| Wall Thickness | See variant options |
| Pressure Rating | See variant options |
| Compatible Cement Standard | ASTM D2564 PVC solvent cement |
| Quantity per Order | 1 piece (per unit selected) |
Match the fitting size to the nominal outside diameter (OD) of your existing pipe. For example, if your pipe is labeled ¾" nominal, select the 20 mm option; for 2" nominal pipe, select the 63 mm option. When in doubt, measure the pipe OD with calipers and compare to the nominal size chart for your pipe schedule.
These fittings are molded from rigid PVC and are suitable for cold-water pressure service. For potable water applications, verify that the fitting carries the required NSF/ANSI 61 certification for your jurisdiction and confirm compliance with your local plumbing code before installation.
PVC is inherently resistant to rust, most mineral salts, dilute acids, and common irrigation chemicals. It is not recommended for use with concentrated solvents, aromatic hydrocarbons, or chlorinated solvents. For chemical compatibility in industrial settings, consult a PVC chemical resistance chart before use.
Standard rigid PVC fittings are rated for cold-water service, typically up to approximately 60 °C (140 °F) at reduced pressure. They are not suitable for hot-water supply lines or steam applications. For hot-water service, consider CPVC fittings instead.
Yes — most plumbing codes require a purple or clear PVC primer (conforming to ASTM F656) to be applied before solvent cement. Primer softens and cleans the PVC surface, allowing the cement to create a true chemical fusion bond. Skipping primer can result in a weaker joint that may fail under pressure.
Yes. PVC solvent-weld fittings are widely used in buried irrigation and drainage applications. Ensure the trench is free of sharp rocks that could stress the pipe, provide adequate bedding material, and allow the solvent-weld joint to fully cure before backfilling and pressurizing the line.
A transitional socket fitting has a stepped or tapered socket bore that accommodates a change in pipe diameter within a single fitting body. This allows you to connect two pipes of different nominal sizes — or transition between schedule ratings — without needing a separate reducer bushing, simplifying the fitting count and reducing potential leak points.
