PVC Pipe Reducing Plumbing Concentric Connector Coupling Fittings 25-110mm White

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PVC Pipe Reducing Plumbing Concentric Connector Coupling Fittings 25-110mm White

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Big End: 25mm

Small End: 20mm

Amount: 1pcs

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$1.60 USD

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Verfügbar (500 Stück), versandbereit

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PVC Concentric Reducing Couplings — Leak-Free Pipe Transitions for Every Project

Struggling to connect two pipes of different diameters without leaks or costly fittings? Whether you're a homeowner tackling a weekend repair or a tradesperson managing a drainage run, mismatched pipe sizes are one of the most common frustrations in plumbing work. These PVC pipe reducing concentric connector coupling fittings are engineered to bridge that gap cleanly and reliably.

Each fitting is made from rigid white PVC (polyvinyl chloride), offering a smooth concentric bore that aligns both pipe ends on the same centerline. The size range spans from 25mm (~1 in) on the small end up to 110mm (~4-3/8 in) on the large end, with wall thickness typically in the 2–4mm range depending on the diameter. The concentric design ensures balanced flow and minimal turbulence at the transition point.

These reducing couplings are well-suited for residential drain-waste-vent (DWV) systems, garden irrigation line repairs, rainwater downpipe connections, and pool or spa plumbing where a step-down from a larger supply line to a smaller branch is required. The white finish blends with standard PVC pipework and is compatible with solvent-cement jointing methods used across most PVC plumbing systems.

🔗 Compatibility: Designed for standard PVC pressure and DWV pipe systems. Suitable for solvent-cement (glue) jointing. Not rated for high-pressure or hot-water applications. Verify local pipe OD standards before ordering.

✅ Key Features of These PVC Concentric Reducing Couplings

📐 Wide Size Matrix

Big end from 25mm to 110mm; small end from 20mm to 90mm — covering the most common residential and light-commercial pipe reduction combinations in a single product line.

⚪ Rigid White PVC Construction

Made from rigid PVC for dimensional stability, corrosion resistance, and compatibility with standard solvent-cement adhesives. The white finish matches most domestic pipework.

🎯 Concentric Bore Design

Both pipe ends share the same centerline, making installation in straight runs straightforward and reducing the risk of misalignment during gluing.

💧 Smooth Internal Flow Path

The tapered internal transition minimizes turbulence and pressure drop at the reduction point, supporting consistent flow in drainage and irrigation applications.

🔧 Solvent-Cement Ready

Socket ends are sized for standard PVC solvent-cement jointing — no special tools required. Clean, prime, and glue for a permanent, leak-resistant connection.

📦 Flexible Quantity Options

Available in packs of 1, 2, 3, 5, 10, or 20 pieces — order exactly what your project needs, from a single repair fitting to a bulk supply for larger installations.

📐 Technical Specifications — PVC Concentric Reducing Couplings

Material	Rigid PVC (Polyvinyl Chloride)
Color / Finish	White
Fitting Type	Concentric Reducing Coupling (Socket × Socket)
Big End Diameter	25mm / 32mm / 40mm / 50mm / 63mm / 75mm / 90mm / 110mm
Small End Diameter	20mm / 25mm / 32mm / 40mm / 50mm / 63mm / 75mm / 90mm
Wall Thickness	See variant options
Jointing Method	Solvent Cement (PVC Glue)
Pressure Rating	See variant options
Temperature Range	0°C – 60°C (32°F – 140°F) typical for rigid PVC
Application	DWV, Drainage, Irrigation, Rainwater, Pool/Spa Plumbing
Pack Sizes Available	1 / 2 / 3 / 5 / 10 / 20 pcs

❓ Frequently Asked Questions

How do I choose the right big end and small end size?

Measure the outer diameter (OD) of both pipes you need to connect. The larger pipe OD corresponds to the "Big End" and the smaller pipe OD corresponds to the "Small End." PVC pipe sizes are typically nominal, so a 25mm fitting accepts standard 25mm OD PVC pipe. If you are unsure, measure with calipers before ordering.

Are these fittings suitable for pressure water supply lines?

These couplings are made from rigid PVC and are primarily designed for DWV (drain-waste-vent), drainage, and irrigation applications. For mains pressure supply lines, verify the pressure rating of the specific size variant against your system's working pressure. Contact us to confirm suitability for high-pressure applications.

What adhesive should I use to install these fittings?

Use a standard PVC solvent cement (PVC glue) appropriate for your pipe class. Clean both the pipe end and fitting socket with a clean cloth, apply PVC primer if required by local code, then apply solvent cement to both surfaces and push together with a quarter-turn twist. Hold for 30 seconds and allow to cure per the adhesive manufacturer's instructions before pressurizing.

Can these be used for hot water or steam applications?

Rigid PVC is generally rated for continuous use up to approximately 60°C (140°F). It is not suitable for hot water supply lines above this temperature or for steam applications. For hot water systems, consider CPVC or other heat-rated fittings.

Are these fittings corrosion-resistant?

Yes. PVC is inherently resistant to corrosion, rust, and most common household chemicals including mild acids and alkalis. It will not corrode in soil or in contact with standard drainage waste, making it a reliable choice for underground and outdoor drainage installations.

What is the difference between a concentric and eccentric reducer?

A concentric reducer (like this product) has both pipe ends aligned on the same centerline — ideal for vertical pipe runs and most standard plumbing applications. An eccentric reducer has one flat side, keeping the bottom of both pipes level — used in horizontal runs where drainage slope must be maintained. These fittings are concentric design.

How many pieces should I order for a typical repair?

For a single pipe repair or connection, 1 piece is sufficient. If you are working on a larger project with multiple reduction points, or want spares on hand, the 5-pack or 10-pack options offer better value per unit. The 20-pack is suited for trade or bulk project use.

🛒 Select your Big End and Small End diameter above, then add to cart.

PVC Pipe Reducing Plumbing Concentric Connector Coupling Fittings 25-110mm White

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Beschreibung

PVC Concentric Reducing Couplings — Leak-Free Pipe Transitions for Every Project

✅ Key Features of These PVC Concentric Reducing Couplings

📐 Technical Specifications — PVC Concentric Reducing Couplings

❓ Frequently Asked Questions

PVC Pipe Reducing Plumbing Concentric Connector Coupling Fittings 25-110mm White

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