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

These fittings are sized for metric 25mm OD solvent-weld PVC pressure pipe (25mm outside diameter, ~1 inch). They are not designed for imperial Schedule 40 or Schedule 80 pipe, which uses different OD dimensions. If you are working with BSP-threaded connections, select the FBSP or MBSP variants.

Use a PVC solvent cement rated for pressure pipe (typically a clear or blue-tinted medium-bodied cement). Apply a PVC primer first for a stronger bond, especially in wet or submerged applications. Solvent cement is not included with the fittings.

Yes. Rigid blue PVC is widely used in aquarium sump plumbing and pond filtration because it is non-toxic to aquatic life once fully cured. Allow solvent-welded joints to cure for the cement manufacturer's recommended time (typically 24 hours) before introducing water or livestock.

A reducing socket has a full socket on both ends — you insert two different pipe sizes into each end. A reducing bush fits inside an existing same-size socket to reduce the bore, useful when you want to step down within a fitting rather than between two pipe runs. Choose the socket for inline reductions and the bush for fitting-to-fitting reductions.

Both unions allow you to disconnect and reconnect a pipe run without cutting. The Old Type uses a flat-face seal, while the New Type uses an updated O-ring or stepped-face design for improved sealing. If you are replacing an existing union, match the type to your current fitting for compatibility.

Yes. The FBSP (female BSP) and MBSP (male BSP) variants are designed to connect to standard BSP-threaded metal fittings, pumps, or appliances. Use PTFE thread seal tape (available as a separate variant in this listing) on all threaded connections to prevent leaks. The brass-insert FBSP variants offer additional thread durability when connecting to metal counterparts.

The fish-tank connector (straight and 90° elbow) is designed to pass through a drilled tank wall. Insert the spigot through the hole, secure with the lock nut and silicone washer (available separately in this listing), then solvent-weld your pipe run to the socket end. The drainage variants work the same way but are optimised for gravity-drain outlets at the tank base.