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When a leaking joint ruins a carefully built aquarium sump or a DIY irrigation run, the culprit is almost always a fitting that was never designed for the job. Hobbyists, aquarists, and small-workshop builders who need a reliable, chemical-resistant connection point will find these PVC pipe fittings a straightforward solution that installs without specialist tools.
Each fitting is moulded from rigid PVC (polyvinyl chloride), offering a smooth bore and consistent wall thickness across the range. Available in ten configurations - straight couplings and 90 degree elbows - spanning nominal pipe sizes of 20 mm (approx 3/4 in), 25 mm (approx 1 in), 32 mm (approx 1-1/4 in), 40 mm (approx 1-1/2 in), and 50 mm (approx 2 in). The bulkhead-style tank connector design seats flush against a drilled panel and tightens with a lock nut to form a watertight seal.
Typical use cases include freshwater and saltwater aquarium overflow and return plumbing, koi pond filtration pipework, rainwater harvesting tank outlets, and low-pressure garden irrigation manifolds - anywhere a compact 90 degree turn or a straight through-wall connection is needed in a PVC pipe run.
The integrated tank-connector profile clamps through a drilled panel wall, creating a sealed through-hull fitting that resists back-pressure without additional sealant tape on a clean cut.
Choose a straight coupling for in-line joins or a 90 degree elbow to redirect flow around corners and obstacles, keeping pipework neat inside cabinets and sumps.
Covers the most common metric PVC pipe diameters used in aquarium, pond, and light irrigation work - from compact 20 mm (approx 3/4 in) runs up to 50 mm (approx 2 in) high-flow returns.
PVC resists chlorinated tap water, salt water, and common aquarium treatments. The material does not corrode, rust, or degrade in typical freshwater or marine aquarium environments.
The lock-nut thread is sized for firm hand tightening against a rubber gasket (where applicable). No pipe wrench or thread tape required for standard low-pressure aquarium and pond applications.
Order 1, 2, 3, 4, 5, 8, or 10 pieces per transaction - ideal whether you need a single replacement fitting or a full set for a new build or multi-tank rack system.
| Material | Rigid PVC (Polyvinyl Chloride) |
|---|---|
| Fitting Types | Straight Coupling; 90 Degree Elbow |
| Available Sizes (Nominal OD) | 20 mm, 25 mm, 32 mm, 40 mm, 50 mm |
| Approximate Imperial Equivalents | 3/4 in, 1 in, 1-1/4 in, 1-1/2 in, 2 in |
| Connection Style | Bulkhead / Tank Connector (through-panel) |
| Wall Thickness | See variant options |
| Pressure Rating | See variant options |
| Colour | See variant options |
| Quantity per Order | 1 / 2 / 3 / 4 / 5 / 8 / 10 pieces |
| Suitable Media | Fresh water, salt water, low-pressure irrigation fluid |
| Temperature Range | Typically 0 to 60 degrees C (32 to 140 degrees F) |
Measure the outer diameter (OD) of your existing pipe with a calliper or tape measure. Match that measurement to the nominal size listed - 20 mm, 25 mm, 32 mm, 40 mm, or 50 mm. If you are unsure, check the pipe printed markings, which usually state the nominal OD. Do not measure the inner bore, as wall thickness varies between pipe schedules.
These fittings are designed for low-to-medium pressure aquarium, pond, and light irrigation applications. For exact pressure ratings, refer to the variant specifications or contact us to confirm suitability for your system working pressure before installation.
Rigid PVC is chemically resistant to salt water, chlorinated tap water, and most aquarium additives and treatments. It will not rust or corrode. Prolonged exposure to direct UV light can cause surface discolouration over time, but this does not affect structural integrity in typical indoor aquarium setups.
These fittings are sized for standard metric PVC pressure pipe. CPVC and ABS pipes may share similar nominal dimensions but have different wall thicknesses and solvent-cement compatibility. We recommend using these fittings exclusively with metric PVC pipe to ensure a proper seal and fit.
For standard aquarium and pond tank walls (acrylic, glass, or thin PVC sheet), the lock-nut and rubber gasket arrangement typically provides a watertight seal with hand tightening alone. Thread tape is generally not required on the bulkhead thread itself. Always test for leaks at low pressure before filling the tank fully.
The Straight fitting passes water through in a direct line - ideal for through-wall connections where the pipe continues in the same direction on both sides of the panel. The 90 Degree Elbow redirects flow at a right angle, which is useful when you need to turn a pipe run inside a cabinet, sump, or tight corner without using a separate elbow and coupling.
You can order as few as 1 piece or as many as 10 pieces in a single transaction. Simply select your preferred type and size, then choose the quantity (1, 2, 3, 4, 5, 8, or 10 pcs) from the Quantity option before adding to cart.
