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When a leaking tank fitting ruins your aquarium setup or water storage system, the culprit is almost always a poorly sealed connector. DIY aquarium builders, pond keepers, and water tank installers need a bulkhead fitting that threads in once and stays watertight — without cracking, corroding, or warping over time. These PVC 90° elbow pipe fittings are engineered for exactly that job.
Each fitting is molded from Polyvinyl Chloride (PVC), a rigid, chemical-resistant thermoplastic that holds its shape under sustained water pressure. The grey finish blends cleanly into tank walls and plumbing runs. Inner diameters span 20mm (~¾ in) through 50mm (~2 in), covering the most common pipe sizes used in aquarium sumps, IBC tote outlets, rainwater harvesting tanks, and irrigation manifolds. Wall thickness is proportional to pipe size, typically 2–4mm, ensuring a secure threaded or push-fit seal.
Typical use cases include: routing overflow lines through aquarium sump walls using a 20mm or 25mm bulkhead elbow; connecting 32mm or 40mm drainage pipes at a 90° turn in a greenhouse irrigation system; and installing 50mm tank outlet elbows on IBC totes or large water storage containers for gravity-fed distribution.
| Material | Polyvinyl Chloride (PVC) |
|---|---|
| Color / Finish | Grey |
| Fitting Type | 90° Elbow Bulkhead Tank Connector |
| Inner Diameter Options | 20mm (~¾"), 25mm (~1"), 32mm (~1¼"), 40mm (~1½"), 50mm (~2") |
| Wall Thickness | See variant options |
| Outer Diameter | See variant options |
| Thread Type | See variant options |
| Max Working Pressure | See variant options |
| Temperature Rating | Ambient / cold water (not for hot water or steam) |
| Pipe Compatibility | Standard PVC pipe, Schedule 40 |
| Packing Quantity | 1 / 2 / 3 / 4 / 5 / 8 / 10 Pcs |
Measure the inner diameter (ID) of your existing pipe or the hole in your tank wall. Match that measurement to the fitting size: 20mm (~¾"), 25mm (~1"), 32mm (~1¼"), 40mm (~1½"), or 50mm (~2"). If you are between sizes, size up to ensure a proper seal with a gasket.
These PVC bulkhead elbows are designed for gravity-fed and low-pressure water systems typical of aquariums, ponds, and storage tanks. For high-pressure applications, please confirm the working pressure rating with the variant specifications before installation.
PVC is inherently resistant to saltwater, chlorinated water, and most mild aquarium chemicals. These fittings will not rust, corrode, or leach harmful substances into your tank water under normal aquarium conditions.
Yes. These fittings are designed to work with standard PVC pipe of the matching inner diameter, including Schedule 40 pipe commonly used in aquarium plumbing and irrigation systems. Always dry-fit before cementing to confirm compatibility.
A rubber gasket is strongly recommended for a watertight seal when mounting through a tank wall. PVC thread sealant tape (PTFE tape) is also advisable on threaded connections. Gaskets are not included — source a gasket sized to match your chosen fitting diameter.
For a single aquarium sump overflow, 1–2 pieces is typically sufficient. For multi-tank systems, greenhouse irrigation manifolds, or IBC tote installations with multiple outlets, ordering a 5- or 10-piece pack reduces per-unit cost and ensures you have spares on hand.
Yes. PVC is widely used in drainage and waste water applications. These 90° elbow bulkheads are suitable for routing drain lines through tank walls or enclosure panels, provided the fluid temperature stays within the ambient/cold water range.
