90° Elbow PVC Drain Pipe Joint Fittings 20 25 30 40 50mm for Aquarium Fish Tank

Measure the inner diameter (ID) of your existing pipe or check the pipe's label. The fitting ID should match your pipe's outer diameter (OD) for a proper slip-socket fit. Common aquarium drain pipes are 20 mm, 25 mm, or 32 mm; larger sump returns often use 40 mm or 50 mm. When in doubt, measure with calipers before ordering.

Yes. The slip-socket design is compatible with standard PVC solvent cement for a permanent, leak-proof bond. Clean and dry both surfaces, apply primer if required by your local code, then apply cement and push the pipe firmly into the socket with a slight twist. Hold for 30 seconds and allow full cure before pressurizing.

Rigid PVC is widely used in aquarium plumbing and is considered safe for freshwater and saltwater systems once fully cured. Avoid exposing the fittings to temperatures above their rated range or to solvents not intended for PVC. If you use solvent cement, allow adequate off-gassing time before introducing livestock.

The three colors are functionally identical; the difference is purely visual. Many builders use color-coding to distinguish drain lines (White), return lines (Blue), and overflow lines (Gray) at a glance. Choose the color that best fits your plumbing layout or cabinet aesthetics.

These fittings are molded from rigid PVC suitable for gravity-drain and low-pressure aquarium and irrigation applications. They are not rated for high-pressure mains water supply. For typical aquarium sump, overflow, and drip-irrigation use, the material provides reliable impact and stress resistance under normal operating conditions.

Some configurations use a compression washer at the joint to create a tool-free, removable seal — useful when you need to disassemble the plumbing for maintenance. The spare washer variants (available for each size: 20 mm, 25 mm, 32 mm, 40 mm, 50 mm) let you replace worn or damaged washers without buying a whole new fitting.

Yes. The 90° elbow is well-suited for drip-irrigation lateral connections, hydroponics drain loops, and other low-pressure water-routing applications where a sharp directional change is needed. Match the ID to your irrigation tubing or pipe OD for a secure fit.

Yes — the fitting is identical across all quantity options. Ordering 2 Pcs or 5 Pcs simply provides multiple units of the same size and color at a lower per-unit cost, which is convenient for larger builds or when you want spares on hand.