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When your pipe run changes diameter mid-system, a poorly matched fitting can cause leaks, pressure loss, or cracked joints that are expensive to fix. Whether you are a plumber, irrigation installer, or hands-on DIY builder, you need a reducing coupling that seats flush, bonds cleanly, and holds under pressure. These white PVC long conical reducing sockets are engineered for exactly that job.
Each fitting is moulded from rigid PVC (polyvinyl chloride) in a long conical body profile, designed for solvent-cement (Klebefitting) installation. The two inner diameters span from 25 mm (approx. 1 in) on the smaller end up to 200 mm (approx. 7.87 in) on the larger end, with wall thickness proportional to pipe class. Available in 36 size combinations and sold in packs of 1, 2, 3, 5, or 10 pieces.
Typical use cases include cold-water supply line reductions, rainwater downpipe transitions, garden irrigation manifold connections, and pool or spa plumbing where a long conical reducer provides a stronger glue surface than a short-pattern fitting. The white finish suits exposed installations where aesthetics matter.
| Material | Rigid PVC (Polyvinyl Chloride) |
|---|---|
| Fitting Type | Long Conical Reducing Socket (Muffe, Klebefitting) |
| Connection Method | Solvent Cement (Glue / Kleben) |
| Colour | White |
| Inner Diameter 1 (Larger End) | 25 mm – 200 mm (approx. 1" – 7.87") |
| Inner Diameter 2 (Smaller End) | 20 mm – 160 mm (approx. 0.79" – 6.30") |
| Available Size Combinations | 36 (see variant selector) |
| Pack Quantities Available | 1 / 2 / 3 / 5 / 10 pieces |
| Wall Thickness | See variant options |
| Pressure Rating | See variant options |
| Temperature Range | Up to approx. 60 °C (140 °F) for cold-water service |
| Standard Compatibility | DIN 8063 / EN ISO 15493 metric PVC pipe systems |
| Surface Finish | Smooth bore, white exterior |
Measure the outer diameter (OD) of both pipes you need to join. The socket inner diameters listed (e.g. 63 × 40 mm) correspond to the pipe OD for standard metric PVC pipe. Select the combination where the larger socket fits your larger pipe and the smaller socket fits your smaller pipe. If you are unsure, check your pipe markings or use a calliper.
Use a standard PVC solvent cement (Klebstoff) rated for rigid PVC pressure or drainage pipe. Apply PVC primer to both the pipe end and socket bore, then apply solvent cement evenly and push the pipe firmly into the socket with a slight twist. Hold for 30 seconds and allow to cure per the cement manufacturer's instructions before pressurising.
These white PVC fittings are designed for cold-water supply, irrigation, drainage, and pool/spa plumbing. Rigid PVC is generally rated up to approximately 60 °C (140 °F) for short-term exposure. They are not recommended for continuous hot-water or heating system use. For hot water applications, consider CPVC or PP-R fittings instead.
A long conical reducing socket (Schlanke Form or Lang Konisch) has a deeper socket bore than a standard short-pattern fitting. The extended depth provides a larger glue surface area, which results in a stronger solvent-cement bond — particularly important for larger pipe diameters or higher-pressure applications. Some size combinations in this listing are specifically noted as slim-form (Schlanke Form) variants.
Yes. Rigid PVC is corrosion-resistant and suitable for outdoor and underground installations. For outdoor above-ground use, the white PVC may discolour slightly over time with prolonged UV exposure, though structural integrity is maintained. For buried applications, ensure the trench is free of sharp stones that could damage the pipe wall.
If you need a single transition point, the 1-piece option keeps costs low. For larger projects — such as irrigation manifolds, multi-outlet drainage runs, or when you want spares on hand — the 2, 3, 5, or 10-piece packs offer a lower per-unit cost. Select your size first, then choose the quantity that matches your project needs.
These fittings are manufactured from rigid PVC and are designed for use with standard metric PVC (UPVC) pressure and drainage pipe conforming to DIN 8063 / EN ISO 15493. Compatibility with CPVC pipe depends on the specific solvent cement used and the pipe OD — verify dimensions before use. They are not intended for ABS or PE pipe systems.
