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When your plumbing or drainage project calls for joining two pipes of different diameters, a mismatched connection can cause leaks, pressure loss, and costly rework. DIYers, plumbers, and contractors working on residential drainage, irrigation, and industrial pipe systems need a reducing fitting they can trust to hold tight. These PVC reducing socket fittings (Klebefittings) deliver a secure, solvent-weld connection between pipes of different sizes — eliminating the guesswork and the gaps.
Each fitting is a long conical reducing socket (Muffe) machined from rigid PVC (polyvinyl chloride). The tapered inner bore transitions smoothly from the larger inlet diameter to the smaller outlet diameter. Available inner diameter combinations range from 25×20mm (~1"×¾") up to 140×110mm (~5½"×4⅓"), covering the most common metric pipe size pairings used in DIN-standard plumbing and drainage systems. Sold in packs of 1, 2, 3, 4, 5, 8, or 10 pieces.
Typical use cases include residential downpipe and gutter drainage reduction, garden irrigation lateral branch connections, and industrial process piping where a stepped reducer is needed for solvent-cement PVC pipe systems. Long-tail applications include PVC pipe reducer for drainage downpipe, metric reducing socket for DIN 8061/8062 pipe, and conical sleeve fitting for solvent-weld plumbing.
| Material | Rigid PVC (Polyvinyl Chloride) |
|---|---|
| Fitting Type | Long Conical Reducing Socket (Muffe) |
| Connection Method | Solvent Cement (Klebefittings / Glue-Weld) |
| Inner Diameter Range | 25×20mm to 140×110mm (see variant options for all 18 size combinations) |
| Inch Equivalents (approx.) | ~¾"×½" up to ~5½"×4⅓" |
| Socket Style | Long taper / conical |
| Wall Thickness | See variant options |
| Applicable Standard | DIN 8061 / DIN 8062 (metric PVC pipe) |
| Color | See variant options |
| Pack Quantity Options | 1 / 2 / 3 / 4 / 5 / 8 / 10 pieces |
| Weight per Unit | See variant options |
| Application | Drainage, irrigation, low-pressure plumbing pipe systems |
Select the size that matches your existing pipe diameters. The first number in each size option (e.g., 75 in "75×50mm") is the larger inlet inner diameter, and the second number (50mm) is the smaller outlet inner diameter. Measure the outer diameter of your existing pipes and cross-reference with the pipe manufacturer's nominal bore chart to confirm the correct inner diameter match.
These fittings are designed primarily for drainage, waste, and irrigation pipe systems that operate at low or no pressure. For pressurized cold-water supply lines, verify that the specific size and wall thickness you select meets the pressure rating required by your system. Contact us to confirm suitability for pressure-rated applications.
PVC is inherently resistant to moisture, rust, and most common environmental chemicals. These fittings are suitable for outdoor use in drainage and irrigation applications. For prolonged UV exposure (e.g., above-ground outdoor installations), consider painting or shielding the fittings, as extended direct sunlight can cause gradual surface discoloration in standard PVC over time.
These fittings are designed for rigid PVC pipe conforming to DIN 8061 / DIN 8062 metric standards. They are not compatible with imperial (inch-nominal) PVC pipe systems, CPVC, or ABS pipe without an adapter. If you are working with non-metric pipe, please verify the actual inner and outer dimensions of your pipe before ordering.
Use a standard PVC solvent cement (Klebstoff) compatible with rigid PVC and DIN-standard pipe. For best results: (1) cut the pipe square, (2) deburr and chamfer the pipe end, (3) clean both surfaces with PVC cleaner/primer, (4) apply solvent cement evenly to both the pipe end and the socket interior, (5) push together with a slight twist and hold for 30 seconds. Allow full cure time before pressurizing or running water.
For single repair jobs or testing a fit, the 1-piece option is the most economical choice. For new installations, rough-in plumbing, or irrigation system builds where multiple reduction points are needed, packs of 5 or 10 offer a lower per-unit cost and ensure you have spares on hand. The quantity options (1, 2, 3, 4, 5, 8, 10) let you match your exact project requirement without over-ordering.
Standard rigid PVC has a typical service temperature range of approximately 0°C to 60°C (32°F to 140°F). These fittings are suitable for cold water drainage and irrigation. They are not recommended for hot water supply lines or systems where fluid temperatures regularly exceed 60°C. For hot water applications, consider CPVC or other heat-rated fittings.
