Grey PVC 40mm ID Pressure Pipe Fittings Metric Solvent Weld Various Parts

Select the Socket variant. A socket (also called a coupler) accepts a 40mm pipe spigot into each end and is solvent-cemented to create a permanent, pressure-rated straight joint. If you need to join a 40mm run to a smaller pipe, choose the appropriate Reducing Socket (e.g., 40mm:25mm) instead.

Grey uPVC pressure fittings are rated for cold-water service, typically up to 60 °C. They are not recommended for continuous hot-water supply lines or steam applications. For hot water, consider CPVC or PP-R systems. These fittings are well suited to cold mains, irrigation, aquarium filtration, and hydroponics.

Identify the larger pipe size first (40mm in this range) and the smaller branch size you need to connect. Then choose the matching Reducing Socket, Reducing Tee, or Reducing Bush variant — for example, "40mm:25mm Reducing Socket" accepts 40mm on one end and 25mm on the other. Reducing bushes fit inside a standard socket to step down the bore without adding pipe length.

Both union types allow the pipeline to be disconnected and reconnected without cutting pipe — useful for servicing pumps, filters, or valves. The Old Type uses a traditional flat-face seal, while the New Type incorporates an updated O-ring or spigot-seal design for improved leak resistance. If you are replacing an existing union, match the type to your current fitting for compatibility.

Yes. Grey uPVC is inert to fresh and salt water and is widely used in aquarium sump, refugium, and filtration builds. This listing includes dedicated Fish Tank Connector (Straight & 90° Elbow) and Fish Tank Drainage fittings designed for bulkhead and through-tank connections, as well as Water Filter Cap Nets and Silicone Washers for a complete aquatic plumbing solution.

You need a clean, square pipe cut and PVC solvent cement (sold separately). This listing includes a 16–42mm PVC Pipe Scissors variant for clean, burr-free cuts on pipe up to 42mm OD, and replacement blades are also available. Apply primer (if required by local code), then solvent cement to both the pipe spigot and fitting socket, push together with a quarter-turn, and hold for 30 seconds. Allow full cure time before pressurising.

The handle colour is a convention used to distinguish service lines: red handles are commonly used to mark hot-water or specific-service lines, while blue handles indicate cold-water lines. Both valves are functionally identical quarter-turn ball valves rated for the same pressure and temperature range. Choose based on your site's colour-coding convention or personal preference.

Packing quantities of 5 or 10 pieces offer the best per-unit value for trade use and cover most single-run installations. For high-volume projects such as irrigation manifolds or aquaculture systems, select 10 or 20 pieces where available. Single-piece quantities are ideal for maintenance repairs where only one fitting is needed.