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When you need to branch off a main pipe run into a smaller diameter line without leaks or mismatched joints, finding the right reducing tee can be frustrating. These white PVC reducing tee solvent weld fittings are designed for DIY builders, pond keepers, aquarium hobbyists, and irrigation installers who need a clean, permanent branch connection between two different pipe sizes.
Each fitting is moulded from rigid white PVC (uPVC) and uses a solvent weld (glue) socket connection on all three ports. The larger socket accepts the main pipe run while the smaller socket accepts the branch pipe. Sizes range from 25×20mm (~1"×¾") up to 200×160mm (~8"×6¼"), covering the most common metric pipe diameters used in domestic and light commercial plumbing, pond, and aquarium pipework. Available in packs of 1, 2, 3, 5, or 10 pieces.
Typical applications include splitting a pond pump return line into two different-diameter circuits, creating a branch feed in a garden irrigation system using PVC reducing tee fittings, and building custom aquarium sump plumbing where a 63mm main return branches into a 25mm overflow line. The solvent weld bond creates a joint as strong as the pipe itself, making these fittings suitable for low-pressure water systems.
| Material | Rigid uPVC (unplasticised PVC) |
|---|---|
| Colour | White |
| Connection Type | Solvent weld (glue) socket — all three ports |
| Size Range (Large ID × Small ID) | 25×20mm to 200×160mm |
| Pipe Standard | Metric uPVC solvent weld pipe |
| Wall Thickness | See variant options |
| Working Pressure | See variant options |
| Pack Quantity Options | 1 / 2 / 3 / 5 / 10 pieces |
| Fitting Type | Reducing Tee (T-piece) |
| Application | Aquarium, pond, irrigation, low-pressure plumbing |
Measure the outer diameter (OD) of both your main pipe and your branch pipe. The size listed (e.g. 63×25mm) refers to the larger socket ID × smaller socket ID. For standard metric uPVC pipe, the pipe OD typically matches the fitting socket ID. If you are unsure, check your pipe's markings or measure with calipers before ordering.
These fittings are designed for low-pressure water systems such as aquariums, ponds, and gravity-fed irrigation. They are not rated for mains water pressure. Always verify the working pressure rating of both the fitting and the pipe before use in any pressurised application.
Yes. Rigid uPVC is chemically inert and does not leach plasticisers or harmful compounds into water once the solvent cement has fully cured (typically 24 hours). These fittings are widely used in aquarium sump plumbing and pond filtration systems.
Use a standard uPVC solvent weld cement (also called PVC solvent cement or PVC glue) suitable for cold water applications. Apply a thin, even coat to both the pipe end and the fitting socket, push firmly together with a slight twist, and hold for 30 seconds. Allow at least 24 hours cure time before running water through the joint.
An equal tee has all three sockets the same diameter, so all connected pipes must be the same size. A reducing tee has one or two sockets at a smaller diameter, allowing you to branch off a smaller pipe from a larger main run — for example, a 63mm main return line branching into a 25mm feed line — without needing a separate reducer fitting.
No. Solvent weld joints are permanent — the cement chemically fuses the pipe and fitting together. If you make an error, you will need to cut out the fitting and use a new one. It is recommended to dry-fit all components before applying cement to confirm alignment and sizing.
Ordering in packs of 2, 3, 5, or 10 reduces the per-unit cost and ensures you have spares on hand for complex plumbing runs or in case of a miscut. For larger pond or irrigation builds requiring multiple branch points, multi-packs offer better value than ordering individual fittings separately.
