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When a leaking joint or mismatched fitting derails your water tank build, the right adapter makes all the difference. Whether you're a homeowner setting up a rainwater harvesting system, a maker building an irrigation network, or a contractor connecting PVC pipe runs, these PVC water tank adapter fittings give you a secure, watertight seal without the guesswork.
This listing covers three connection types — Adhesive Connection (solvent-weld socket), Female Thread, and Thread Plug — available in sizes ranging from 5mm (≈3/16") up to 110mm (≈4-3/8"), with imperial thread sizes of 2-1/2", 3", and 4" also available. All fittings are manufactured from rigid PVC, offering a lightweight yet durable solution for low-to-medium pressure water management applications.
Typical use cases include DIY rainwater tank plumbing, garden irrigation manifolds, aquaponics and hydroponics system connections, and general-purpose PVC pipe joining for residential or light commercial projects. Long-tail applications such as "PVC tank bulkhead adapter," "solvent weld water tank fitting," and "female thread PVC pipe connector" are all covered within this product range.
| Material | Rigid PVC (Polyvinyl Chloride) |
|---|---|
| Connection Types | Adhesive Connection / Female Thread / Thread Plug |
| Size Range (Metric) | 5mm, 90mm, 110mm |
| Size Range (Imperial) | 2-1/2", 3", 4" |
| Thread Standard | See variant options |
| Pressure Rating | See variant options |
| Color | White / Grey (See variant options) |
| Wall Thickness | See variant options |
| Package Quantity | 1 piece per unit |
| Compatible Pipe Standard | Schedule 40 / Class B PVC (Contact us to confirm) |
Choose Adhesive Connection if you're permanently joining PVC pipes using solvent cement — ideal for fixed installations like tank inlets or irrigation manifolds. Choose Female Thread if you need to connect to a male-threaded pipe or fitting for a removable joint. Choose Thread Plug to cap or seal an open threaded port on a tank or pipe end.
Measure the outer diameter (OD) of your existing pipe or the port opening on your tank. Metric sizes (5mm, 90mm, 110mm) suit standard metric PVC pipe, while imperial sizes (2-1/2", 3", 4") suit BSP or NPT threaded systems. If unsure, contact us with your pipe OD measurement and we'll help you select the correct variant.
Rigid PVC is widely used in low-to-medium pressure water systems. It handles typical residential water pressures well and resists corrosion, UV degradation (when not exposed to direct sunlight), and most household chemicals. For high-pressure applications, please confirm the pressure rating of your specific variant before ordering.
PVC is inherently corrosion-resistant and will not rust or scale like metal fittings. For outdoor installations, we recommend protecting the fitting from prolonged direct UV exposure where possible, as extended sunlight can cause gradual surface degradation over many years. For buried or shaded installations, PVC performs excellently long-term.
Thread standard varies by variant. BSP (British Standard Pipe) and NPT (National Pipe Thread) are not interchangeable. Please check your existing fittings or pipe markings before ordering, or contact us to confirm compatibility. Using mismatched thread standards can result in leaks even with PTFE tape applied.
For Adhesive Connection variants, you'll need standard PVC solvent cement (primer + cement), a clean cloth, and basic safety equipment. No power tools are required. For threaded variants, hand-tightening is sufficient; applying PTFE thread seal tape is recommended for a leak-free joint. No specialist plumbing tools are needed for either type.
PVC fittings are commonly used in potable water systems globally. However, suitability depends on the specific grade of PVC and any applicable local regulations. If you're installing these in a drinking water system, please contact us to confirm the material certification for your variant before purchase.
