UPVC Clear 45° Elbow Plumbing Pipe Fittings For Aquarium & Fish Tank 20mm-110mm

Match the fitting size to the outer diameter (OD) of your UPVC pipe. For example, a 25mm fitting accepts 25mm OD metric UPVC pipe. If you are unsure, measure the pipe OD with calipers before ordering. Common aquarium return lines use 25mm–50mm; overflow standpipes often use 40mm–63mm.

A 45° elbow produces less friction loss (lower equivalent pipe length) than a 90° elbow, which means your return pump works less hard to move the same volume of water. In systems with long pipe runs or multiple bends, using 45° elbows where geometry allows can meaningfully improve flow rate and reduce pump noise.

Yes. UPVC is chemically inert and does not leach plasticizers, corrode, or degrade in continuous saltwater contact. It is widely used in reef and marine aquarium plumbing. Avoid using standard PVC cement primers that contain aggressive solvents near livestock — allow joints to cure fully and flush the line before introducing water to the display tank.

Use a UPVC-rated solvent cement (also labeled PVC pressure cement) along with a compatible primer/cleaner. Apply primer to both the pipe spigot and fitting socket, then apply cement and push the pipe in with a quarter-turn. Hold for 30 seconds. Allow the joint to cure per the cement manufacturer's instructions — typically 15–30 minutes before handling and 24 hours before full pressure.

UPVC fittings rated PN10 or PN16 are designed for continuous pressure service well above the operating pressures typical of aquarium return pumps (usually under 0.5 bar). Confirm the pressure rating of the specific variant you select. Properly solvent-cemented joints will not be the weak point in a correctly assembled aquarium plumbing circuit.

These are rigid UPVC socket fittings designed for solvent-cementing to rigid UPVC pipe. They are not directly compatible with flexible vinyl or silicone tubing without an adapter (e.g., a barbed or threaded reducer). If your system uses flexible tubing, contact us to confirm the correct transition fitting.

Wall thickness and pressure ratings vary by size and production batch. If you need confirmed dimensional data for a specific size before ordering, please contact us to confirm — we are happy to provide specification sheets for the size you need.