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Free Samples
See the finish before you commit
Trade Account
Trade prices on every range
Expert Advice
Speak to our team · 020 4634 2203
Free Delivery
On orders over £300
Sold By The m²
Calculator on every tile and floor
Klarna & PayPal
Spread the cost, subject to status

Trade Prices
Always trade prices, never retail markup.
UK Delivery
£50 flat rate • up to 20 business days.
FENSA Fitting
Professional install available.
by Linx Square
SKU: 168347
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Linx Square
inc. VAT

Linx Square
inc. VAT

Linx Square
inc. VAT

Linx Square
inc. VAT
Plumbright White Plastic Push-Fit 10mm x 15mm Straight Stem Coupler Reducer (SPR6716M) The Plumbright 10mm x 15mm Straight Stem Coupler Reducer is a high-quality push-fit plumbing fitting designed to provide a secure, in-line connection between different pipe sizes. It offers a fast, flame-free installation method that eliminates the need for soldering, making it ideal for professional installers and competent DIY users working on heating systems, hot and cold water services, and wet underfloor heating pipework. Key Features and Benefits Straight push-fit design for fast, tool-free in-line pipe connection Creates a secure reducing connection between 10mm and 15mm pipework Suitable for hot and cold water systems and heating installations, including wet underfloor heating WRAS approved for assured quality and compliance Durable, corrosion-resistant construction for long-term reliability Demountable and reusable for flexible installation and maintenance Secure locking indicator helps confirm correct installation Suitable Applications and Compatibility This straight stem coupler reducer is suitable for use in domestic and light commercial plumbing systems where a reliable reduction between pipe sizes is required in a straight run. It is compatible with standard plastic and barrier pipe systems and is commonly used in central heating circuits, hot and cold water distribution, and wet underfloor heating systems where efficient and compact pipe routing is essential. Role In Underfloor Heating Within a wet underfloor heating system, straight reducing couplers are used to connect different pipe sizes between manifolds, distribution pipework, and heating circuits. This helps maintain consistent flow rates and balanced heat distribution across all zones, supporting efficient system performance. The straight inline design also helps reduce unnecessary directional changes, improving flow efficiency. Guidance Ensure pipe ends are cut square, clean, and free from burrs before installation. Push the pipe fully into the fitting until it reaches the internal stop to achieve a secure, leak-free connection. Always verify compatibility with the pipe system being used and follow standard installation practices for sealed heating systems. Technical Overview Connection type: Push-fit Fitting type: Straight stem coupler reducer Material: High-performance plastic composite System compatibility: Hot and cold water, sealed heating systems Approvals: WRAS approved Design: Demountable and reusable with secure connection indicator :