PVC Pipe Reducing Connector — Straight Adaptor for Reliable Pipe Size Transitions
When a plumbing run changes pipe diameter mid-system, a mismatched joint is the fastest route to leaks, pressure loss, and costly rework. DIYers, irrigation installers, and maintenance contractors who need a dependable PVC pipe reducing connector will find this straight adaptor engineered for clean, solvent-weld transitions without compromise.
Each fitting is manufactured from rigid PVC (polyvinyl chloride) with a smooth bore interior and uniform wall thickness. The range spans inner diameter combinations from 25×20 mm (approximately 1″×¾″) up to 200×160 mm (approximately 8″×6¼″), covering the most common metric pipe schedules used in residential and commercial plumbing. Available in White, Blue, and Grey to match existing pipework or colour-code systems at a glance.
Typical applications include cold-water supply line step-downs, drip irrigation manifold connections, rainwater harvesting downpipe reductions, and HVAC condensate drain transitions — all scenarios where a PVC straight reducing adaptor must hold pressure and resist chemical attack over the long term.
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Compatible with standard metric PVC pressure pipe (PN10/PN16) and DWV pipe systems. Solvent-cement jointing required. Not rated for hot-water or steam service.
✅ Key Features of These PVC Pipe Reducing Connectors
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Wide Size Range
36 inner-diameter combinations from 25×20 mm to 200×160 mm cover virtually every metric step-down scenario in residential and light-commercial plumbing.
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Three Colour Options
White, Blue, and Grey variants allow colour-coded system identification or seamless matching to existing pipework — order the colour that suits your installation.
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Smooth Bore Interior
The uniform, smooth internal bore minimises turbulence and pressure drop at the reduction point, maintaining consistent flow velocity through the transition.
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Corrosion & Chemical Resistance
Rigid PVC is inherently resistant to rust, scale, and a broad range of household and agricultural chemicals, making it suitable for irrigation, drainage, and cold-water supply.
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Solvent-Weld Ready
Standard socket depth on both ends accepts PVC solvent cement for a permanent, leak-free bond that meets typical residential plumbing requirements.
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Flexible Pack Quantities
Available in packs of 1, 3, 5, 10, or 20 pieces — buy a single fitting for a repair or stock up in bulk for a full installation project.
📐 Technical Specifications — PVC Reducing Straight Adaptor
| Material |
Rigid PVC (Polyvinyl Chloride) |
| Connection Type |
Solvent-weld socket (both ends) |
| Inner Diameter Range |
25×20 mm to 200×160 mm (see variant options) |
| Available Colours |
White, Blue, Grey |
| Pack Quantities |
1 / 3 / 5 / 10 / 20 pcs |
| Pressure Rating |
See variant options |
| Wall Thickness |
See variant options |
| Temperature Rating |
Cold water only (typically up to 60 °C / 140 °F) |
| Compatible Pipe Standard |
Metric PVC pressure & DWV pipe |
| Jointing Method |
PVC solvent cement (not included) |
| Colour Coding |
White / Blue / Grey |
❓ Frequently Asked Questions
How do I choose the right size reducing connector?
Select the variant whose Inner Dia. option matches your existing pipes — the first number is the larger (inlet) pipe diameter and the second is the smaller (outlet) pipe diameter. For example, "50×32 mm" connects a 50 mm pipe down to a 32 mm pipe. Measure the outer diameter of your pipe and refer to the pipe manufacturer's nominal bore chart to confirm the matching socket size.
Can this fitting handle hot water or steam?
No. Rigid PVC is rated for cold-water service only, typically up to around 60 °C (140 °F) at reduced pressure. For hot-water systems, CPVC or copper fittings are the appropriate choice. Using standard PVC in hot-water or steam lines can cause deformation and joint failure.
Is this fitting corrosion-resistant for outdoor or irrigation use?
Yes. PVC is inherently non-corrosive and resistant to rust, scale, and most common fertilisers and agricultural chemicals used in drip and sprinkler irrigation systems. It is UV-stable enough for short-term outdoor exposure, though burying or shading the fitting will extend its service life significantly.
What solvent cement should I use, and is it included?
Solvent cement is not included. Use a standard PVC pipe cement (also called PVC solvent weld adhesive) rated for pressure pipe. Apply primer first if required by your local plumbing code. Follow the cement manufacturer's cure time before pressurising the joint — typically 15–30 minutes for initial set and 24 hours for full cure.
Are these fittings compatible with imperial (inch) pipe sizes?
The fittings are sized to metric nominal bore dimensions. Many metric sizes correspond closely to imperial equivalents (e.g., 25 mm ≈ 1″, 32 mm ≈ 1¼″, 50 mm ≈ 2″), but the socket depth and outer diameter are designed for metric pipe. Verify your pipe's actual outer diameter before ordering to ensure a proper fit.
Why are there three colour options — do they differ in performance?
White, Blue, and Grey variants are identical in material composition and pressure performance. The colour difference is purely for visual identification — for example, Blue is commonly used to colour-code potable water lines, while Grey is often used for drainage or recycled-water systems. Choose the colour that matches your system convention or existing pipework.
Should I buy individual pieces or a bulk pack?
For a single repair or prototype, the 1-piece option keeps costs low. For full installations — such as an irrigation manifold, multi-outlet drainage run, or a plumbing rough-in — packs of 5, 10, or 20 offer a lower per-unit cost and ensure you have spares on hand. Bulk packs are also useful for contractors who stock common sizes.
🛒 Select your Inner Dia. size, quantity, and colour above, then add to cart.
