PVC 4-Way Oblique Drainage Pipe Connectors — Reliable Multi-Branch Flow Control for Residential and Commercial Plumbing
When a drainage run needs to split in multiple directions without sacrificing flow efficiency, a poorly chosen fitting becomes the weakest point in the entire system. Plumbers, contractors, and serious DIYers working on bathroom waste lines, kitchen drain stacks, or outdoor drainage networks need a connector that handles oblique branch angles without leaking under sustained load.
These PVC 4-way oblique equal reducer drainage pipe connectors are moulded from rigid PVC compound and feature solvent-weld socket ends for a permanent, leak-free bond. Inner diameter options span 50×50 mm (approx. 2×2 in) through 160×160 mm (approx. 6.3×6.3 in), with rectangular cross-section variants (e.g. 75×50 mm, 110×75 mm) available for non-square duct runs. Wall thickness is consistent with standard DIN/AS drainage schedules across all sizes.
Typical applications include multi-branch floor drain manifolds in wet rooms, four-way junction boxes in underground stormwater drainage, rectangular downpipe adapters on commercial façades, and split-run waste connections behind vanity units — all scenarios where a PVC 4-way oblique reducer drainage fitting eliminates the need for multiple separate elbows and tees.
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Compatibility: Designed for standard PVC drainage pipe systems. Confirm your pipe's outer diameter matches the selected inner diameter variant before ordering. Solvent-weld (cement) installation; not suitable for push-fit or threaded connections.
✅ Key Features of These PVC 4-Way Oblique Drainage Pipe Connectors
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True 4-Way Oblique Junction
Splits one inlet into four outlets at oblique angles, maintaining smooth internal flow paths that reduce turbulence and sediment build-up compared to sharp-tee configurations.
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Wide Size Range
Eight inner diameter combinations from 50×50 mm to 160×160 mm, including asymmetric rectangular options (75×50, 110×50, 110×75, 160×110 mm), cover most residential and light-commercial drainage schedules.
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Rigid PVC Construction
Moulded from rigid PVC compound rated for continuous exposure to grey water, mild acids, and alkaline cleaning agents — resistant to corrosion, scaling, and biological fouling over the service life of the installation.
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Solvent-Weld Socket Ends
Each port accepts standard PVC solvent cement for a molecular-bond joint that meets typical drainage pressure and vacuum ratings, eliminating the risk of pull-out or joint creep under thermal cycling.
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Multi-Pack Quantity Options
Available in 1, 2, or 5-piece packs so you can order exactly what a single repair needs or stock up for a full drainage manifold installation without over-purchasing.
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Versatile Installation Contexts
Suited for in-slab, above-slab, and wall-chase drainage runs; compatible with standard PVC pipe in floor drain manifolds, stormwater pits, downpipe junctions, and multi-fixture waste stacks.
📐 Technical Specifications — PVC 4-Way Oblique Drainage Fittings
| Material |
Rigid PVC (Polyvinyl Chloride) |
| Fitting Type |
4-Way Oblique Equal / Reducer Junction |
| Connection Method |
Solvent-weld (cement) socket |
| Inner Diameter Options |
50×50 mm, 75×75 mm, 110×110 mm, 160×160 mm, 75×50 mm, 110×50 mm, 110×75 mm, 160×110 mm |
| Wall Thickness |
See variant options |
| Colour / Finish |
See variant options |
| Application |
Gravity drainage, stormwater, waste water (non-pressure) |
| Temperature Range |
Typically 0 °C to 60 °C (32 °F to 140 °F) continuous service |
| Pack Quantity |
1 Pcs / 2 Pcs / 5 Pcs (select above) |
| Certifications |
Contact us to confirm |
❓ Frequently Asked Questions
How do I choose the correct inner diameter for my pipe?
Measure the outer diameter of your existing PVC drainage pipe, then select the fitting whose inner diameter matches that measurement. For example, a pipe with a 110 mm outer diameter typically fits the 110×110 mm variant. If your run changes size between inlet and outlet, choose the asymmetric reducer option (e.g. 110×75 mm) that bridges the two pipe sizes.
Is this fitting suitable for pressurised water supply lines?
No. These connectors are designed for gravity drainage and waste water systems only — they are not rated for pressurised supply lines. Using them on pressurised systems risks joint failure. For pressurised applications, select fittings rated to the relevant pressure schedule (e.g. Class 12 or PN16).
What solvent cement should I use for installation?
Use a PVC solvent cement formulated for drainage-grade rigid PVC, following the cement manufacturer's cure time before allowing flow through the joint. Apply primer first if required by local plumbing code. Avoid using ABS cement or multi-purpose adhesives, as these may not achieve a full molecular bond with rigid PVC.
Can these fittings be used for outdoor or underground drainage?
Yes. Rigid PVC is resistant to soil moisture, mild acids, and UV degradation (when buried). For above-ground outdoor installations exposed to direct sunlight over many years, consider wrapping exposed sections or using UV-stabilised pipe to complement the fitting. Underground installations should follow local bedding and backfill requirements to prevent point-load cracking.
Are the rectangular (asymmetric) variants compatible with square-section duct pipe?
The asymmetric variants (e.g. 75×50 mm, 110×75 mm) are designed for rectangular cross-section drainage duct where the inlet and outlet dimensions differ. Confirm that your pipe's external dimensions match the fitting's internal socket dimensions before cementing. If you are unsure, contact us with your pipe's measurements and we can advise the correct variant.
Why order a 5-piece pack instead of individual fittings?
Multi-pack options reduce per-unit cost and ensure you have spares on hand for a full manifold installation or future repairs without waiting for a reorder. The 5-piece pack is particularly useful for drainage manifold projects where multiple identical junctions are needed at floor drain collection points or stormwater pit inlets.
How do I confirm this fitting meets local plumbing code requirements?
Plumbing codes vary by region. Check that the fitting's material (rigid PVC) and connection method (solvent-weld) are accepted under your local standard (e.g. AS/NZS 1260, EN 1329, or ASTM D2665). If certification documentation is required for your project, contact us to confirm available compliance data before purchasing.
🛒 Select your Inner Diameter and Amount above, then add to cart.
