Grey PVC 25mm ID Pressure Pipe Fittings Metric Solvent Weld Various Parts

Start by confirming your pipe's nominal bore — these fittings are sized for 25mm ID metric pressure pipe. Then identify the joint geometry you need: straight coupling (Socket), direction change (Elbow), branch (Tee or Cross), or termination (End Cap). If you need to step down to a smaller pipe, select the appropriate Reducing Socket, Reducing Elbow, or Reducing Tee with the target diameter on the secondary end (e.g., 25mm:20mm). For connections to pumps or threaded fittings, choose the matching BSP variant.

The primary socket end accepts standard metric pressure pipe with a 25mm nominal bore, which typically has an outer diameter of approximately 32mm depending on pressure class (Class B, C, D, or E). Reducing variants accept the smaller pipe size on the stepped end — for example, a 25mm:20mm Reducing Socket accepts 25mm OD pipe on one end and 20mm OD pipe on the other. Always verify your pipe's actual OD against the fitting's socket depth before cementing.

uPVC is rated for cold-water applications only. Continuous exposure to water above approximately 60°C (140°F) will soften the material and compromise joint integrity. For hot-water or heating circuits, consider CPVC or copper alternatives. These fittings are well suited to cold mains water, irrigation, aquatics, and ambient-temperature process lines.

Yes. uPVC is chemically inert to chlorinated tap water, saltwater, and the mild organic acids found in aquarium and pond environments. It will not rust, pit, or leach metals into the water column, making it a common choice for sump plumbing, return lines, and overflow boxes. The brass-insert BSP variants introduce a small brass contact surface; if you are keeping sensitive invertebrates or soft-water species, opt for the all-PVC FBSP variants instead.

FBSP stands for Female British Standard Pipe — the fitting has an internal thread that accepts a male BSP threaded component (e.g., a pump outlet or a threaded nipple). MBSP stands for Male British Standard Pipe — the fitting has an external thread that screws into a female BSP port. The Brass FBSP variants use a brass insert moulded into the PVC body for improved thread durability and a more reliable seal with PTFE tape on metal-to-metal contact surfaces.

Solvent cement (PVC pipe glue) is required to make a permanent solvent-weld joint and is not included with these fittings. Use a PVC-specific solvent cement rated for pressure pipe. Clean and dry both surfaces, apply cement to the pipe spigot and fitting socket, push together with a quarter-turn, and hold for 30 seconds. Allow the joint to cure for at least 24 hours before pressurising. PTFE thread seal tape (available as a separate variant in this listing) is needed for BSP threaded connections.

Three ball valve styles are available. The Round-Red Handle and Round-Blue Handle valves are standard single-union ball valves — the handle colour is a visual indicator only (e.g., red for hot, blue for cold in plumbing conventions) and does not affect flow rating. The Thick Octagon-Red Handle valve has a heavier-duty body suited to higher-cycle or higher-pressure applications. The Double Union Ball Valve features union connections on both sides, allowing the valve to be removed from the line for servicing without cutting the pipe.