Solvent Weld PVC Overflow Pipe — Reliable Gravity Drainage in Every Size
Leaking overflow connections and mismatched pipe sizes are among the most frustrating plumbing headaches for homeowners, plumbers, and property maintenance teams alike. Whether you're replacing a deteriorated overflow pipe under a bathroom basin, extending a condensate drain on an HVAC unit, or routing a new drainage run in a utility room, having the right diameter and length on hand makes the difference between a clean finish and a costly callback.
Each piece is a single length of solvent weld PVC overflow pipe, available in outer diameters from 16mm (≈5/8") to 110mm (≈4-3/8"), with wall thicknesses ranging from 2mm to 4.3mm depending on diameter. Choose from two cut lengths — 200mm (≈7.9") for short runs and tight spaces, or 500mm (≈19.7") for longer straight sections. Colours available are White, Grey, Blue, and Dark Grey, all sharing identical dimensional and performance specifications.
Typical applications include bathroom and kitchen overflow connections, condensate drain lines for boilers and air handlers, low-pressure gravity drainage in residential and light commercial buildings, and colour-coded pipe identification in multi-service installations. The solvent weld joint system — compatible with standard metric PVC fittings — creates a permanent, leak-free bond without the need for threaded connections or compression rings.
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Compatibility: Designed for use with standard metric solvent weld PVC fittings (elbows, couplings, tees, reducers) matching the listed OD. Generally compatible with BS EN 1329 / DIN 19531 metric overflow pipe fittings. Always verify fitting socket ID against pipe OD before ordering.
✅ Key Features of These Solvent Weld PVC Overflow Pipes
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📐Wide Size Range — OD from 16mm (≈5/8") to 110mm (≈4-3/8") covers the most common residential and light commercial overflow pipe sizes in a single product line.
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🔩Solvent Weld Joint System — Glued connections create a permanent, watertight seal without threads or compression fittings, reducing the risk of joint failure in gravity drainage applications.
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🎨Four Colour Options — White, Grey, Blue, and Dark Grey allow colour-coded identification across multi-pipe installations or a clean match to existing pipework.
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⚖️Lightweight PVC Construction — Significantly lighter than copper or cast iron alternatives, making overhead and wall-chase installations easier to handle and support.
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🛡️Corrosion-Resistant Material — PVC does not rust, scale, or react with typical overflow and condensate fluids, reducing long-term maintenance requirements in damp environments.
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✂️Cut-to-Length Flexibility — Both the 200mm (≈7.9") and 500mm (≈19.7") lengths can be trimmed on-site with a fine-tooth saw or pipe cutter, giving you precise fit without waste.
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Sizing note: OD (outer diameter) is the key measurement for fitting compatibility — it is not the same as the internal bore. Confirm the socket internal diameter of your fittings matches the OD listed in the variant options before ordering.
📐 Technical Specifications — Solvent Weld PVC Overflow Pipe
| Material |
PVC (Polyvinyl Chloride) |
| Connection Type |
Solvent weld (glued joint) |
| Outer Diameter (OD) Range |
16mm (≈5/8") — 110mm (≈4-3/8") |
| Available OD × Wall Thickness |
16×2mm, 20×2mm, 25×2mm, 32×2mm, 40×2mm, 50×2.4mm, 63×3mm, 75×3.6mm, 90×4.3mm, 110×4.2mm |
| Available Lengths |
200mm (≈7.9") / 500mm (≈19.7") |
| Colours |
White, Grey, Blue, Dark Grey |
| Application |
Overflow drainage, condensate lines, gravity drainage (low-pressure) |
| Fitting Compatibility |
Standard metric solvent weld PVC fittings (see compatibility note above) |
| Pressure Rating |
Gravity/overflow drainage use — not rated for pressurised supply lines |
| UV Resistance |
Moderate — suitable for covered/indoor use; UV-resistant paint recommended for prolonged outdoor exposure |
| Quantity per Order |
1 piece (single length) |
| Country of Origin |
See variant options / Contact us to confirm |
❓ Frequently Asked Questions
How do I choose the right pipe length — 200mm or 500mm?
Measure the gap between your fittings before ordering. The 200mm (≈7.9") length is generally suited for short runs and tight spaces, while the 500mm (≈19.7") length works well for longer straight sections. Both lengths can be trimmed on-site with a fine-tooth saw or pipe cutter if you need an in-between measurement.
What outer diameter (OD) should I choose?
Match the OD of this pipe to the socket size of your existing fittings. Common residential overflow sizes are typically 20mm–40mm OD; larger diameters (50mm–110mm) are generally used in commercial or high-flow drainage applications. When in doubt, measure the internal diameter of your fitting socket — it should match the pipe OD listed in the variant options.
How strong is solvent weld PVC pipe?
Solvent weld PVC pipe is generally rated for low-pressure overflow and gravity drainage applications. Once the solvent cement cures (typically 15–30 minutes for handling, 24 hours for full pressure), the joint is typically as strong as the pipe itself. It is not designed for high-pressure pressurised water supply lines.
Can this pipe be used outdoors?
PVC is inherently corrosion-resistant and will not rust. For outdoor use, prolonged direct UV exposure can cause gradual surface degradation over many years. In most cases, painting with a UV-resistant paint or routing the pipe in a shaded or covered location is recommended for long-term outdoor installations.
What fittings and standards are compatible with this pipe?
This pipe is designed for use with standard metric solvent weld PVC fittings (elbows, couplings, tees, reducers) that match the listed OD sizes. It is generally compatible with BS EN 1329 / DIN 19531 metric overflow pipe fittings. Always verify the OD of this pipe against the socket ID of your chosen fittings before purchasing.
Which colour should I choose?
White is the most common choice for indoor bathroom and kitchen overflow applications. Grey is widely used in general plumbing and drainage. Blue is traditionally associated with cold-water supply lines in some regions and is also used for visual identification in multi-pipe installations. Dark Grey is often used in soil and waste drainage systems. All colours share the same dimensions and performance characteristics.
Do I need primer before applying solvent cement?
For most PVC overflow pipe applications, a dedicated PVC solvent cement applied to both the pipe end and fitting socket is sufficient. In some regions or for larger diameters, a PVC primer/cleaner is recommended first to ensure a clean, chemically prepared surface. Always follow the instructions on your solvent cement product.
🛒 Select your colour, OD × thickness, and length above, then add to cart — ships from our US warehouse.
