
Linx Square
inc. VAT
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
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: 168350
Need help with this product?
Our team can advise on specification, quantities and delivery — Mon–Fri, 9am–5pm.
Visit the Help CentreSelection

Linx Square
inc. VAT

Linx Square
inc. VAT

Linx Square
inc. VAT

Linx Square
inc. VAT
Plumbright White Plastic Push-Fit 22mm x 28mm Stem Coupler Reducer (SPR6740M) The Plumbright 22mm x 28mm Stem Coupler Reducer is a high-quality push-fit fitting designed to provide a secure, reliable transition between different pipe sizes within plumbing and heating systems. It delivers a fast, flame-free installation method, making it ideal for professional installers and DIY users working on modern central heating systems, hot and cold water services, and wet underfloor heating pipework. Key Features and Benefits Push-fit design for quick, tool-free installation Creates a secure reducing connection between 22mm and 28mm pipework Suitable for hot and cold water systems and heating installations, including wet underfloor heating WRAS approved and manufactured to high industry standards Durable, corrosion-resistant construction for long-term system reliability Demountable and reusable without damaging pipework or fittings Secure locking indicator helps confirm correct installation Suitable Applications and Compatibility This stem coupler reducer is suitable for use in domestic and light commercial plumbing systems where a reliable transition between pipe sizes is required. It is compatible with standard plastic and barrier pipe systems and is commonly used in heating distribution pipework, central heating installations, and wet underfloor heating systems where efficient flow management and neat pipe routing are essential. Role In Underfloor Heating In a wet underfloor heating system, reducing couplers are used to connect different pipe sizes between manifolds, distribution lines, and system pipework. This ensures balanced flow rates and efficient heat delivery across multiple zones. Its push-fit design supports fast installation in tight service areas while maintaining a secure and leak-free connection. Guidance Ensure pipe ends are clean, cut square, and free from burrs before installation. Fully insert the pipe into the fitting until it reaches the internal stop to achieve a secure seal. Always verify compatibility with your pipe system and follow standard installation practices for sealed heating systems. Technical Overview Connection type: Push-fit Fitting type: 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 :