Multilayer Systems
Multilayer Systems | Pipe Upgrades | Plumbing | Kelso
Whether you’re renovating a period property on Roxburgh Street or adding an en-suite in the new developments by the Tweed, HEP’s multilayer systems deliver a smarter way to move water. Our engineers blend durable PEX-AL-PEX technology with precision German fittings, creating a flexible network that resists corrosion, slashes heat loss, and installs neatly behind walls and under floors with minimal disruption.
These future-proof pipe upgrades mean fewer joints, faster flow, and peace of mind backed by Kelso’s most trusted plumbing team. From first survey to final pressure test, we’re on hand with clear quotes, tidy workmanship, and a 25-year warranty—so your home stays warm, efficient and worry-free for decades to come.
FAQs
What is a multilayer plumbing system and why should I consider it for my Kelso home or business?
A multilayer system (often called MLC or PEX-AL-PEX) is a composite pipe made of an inner and outer layer of cross-linked polyethylene bonded to a central aluminium core. You get the flexibility and corrosion resistance of plastic with the strength, shape retention and low-expansion qualities of metal. For properties in Kelso—where older copper or galvanised steel can be prone to lime-scale or frost damage—multilayer pipework offers excellent thermal insulation, silent flow, and a life expectancy of 50+ years.
How do multilayer pipes compare with traditional copper or PVC in terms of performance and longevity?
• Longevity: Tested to withstand 10 bar at 95 °C, multilayer pipes can last as long as (or longer than) copper with none of the internal corrosion issues. PVC, by contrast, has a lower temperature rating and can become brittle over time. • Thermal efficiency: The plastic layers reduce heat loss by up to 30 %, saving on hot-water energy costs. • Water quality: The smooth PEX inner wall resists scale and pitting, keeping water free of metallic taste. • Noise reduction: Flow noise is significantly lower than in metal pipes, ideal for multi-storey homes and hotels. • Freeze resistance: The outer PEX layer expands slightly under freezing conditions, minimising burst risk—useful for Kelso’s cold winters.
Will upgrading to a multilayer system mean major disruption—walls stripped out and floors lifted?
Not usually. Multilayer pipes are highly flexible and can be bent around joists or threaded through existing chases, which reduces the need for wide wall channels or extensive floor lifting. For most domestic retrofits we isolate short sections at a time, keep water off for only a few hours, and reinstate finishes as we go. Full house upgrades in Kelso stone or lath-and-plaster buildings may require selective access panels, but we always provide a method statement before work starts so you know exactly what areas will be opened.
Are multilayer plumbing systems legally approved in Kelso and the wider Scottish Borders?
Yes. All products we install carry WRAS (Water Regulations Approval Scheme) certification and comply with BS EN ISO 21003 for multilayer piping systems. Scottish Water accepts WRAS-listed components, and our installers are SNIPEF and Water Bylaws qualified. On completion you receive a Certificate of Compliance that satisfies local authority building control should you sell or remortgage the property.
What does a typical multilayer pipe upgrade cost and how long will it take?
Costs depend on property size, accessibility and whether bathrooms/kitchens are refurbished at the same time. As a guide: • 2-bed terrace or flat: £2,200–£2,800; 1–2 days onsite. • 3-bed semi: £3,000–£3,800; 2–3 days onsite. • Larger rural homes with multiple bathrooms: £4,500+; 4–5 days onsite. All prices include pipework, fittings, labour, commissioning and disposal of redundant pipe. We provide a fixed quotation after a free survey anywhere in the TD5 postcode area.
How do I maintain or service a multilayer plumbing system after installation?
Maintenance is minimal. The PEX inner liner is non-corrosive, so there’s no annual descaling. We recommend: 1. Visual check of exposed joints once a year for peace of mind. 2. Replacing tap aerator filters every 12-18 months to remove debris. 3. Keeping water pressure below 5 bar; we can fit a pressure-reducing valve if your supply is higher. 4. Booking a full system inspection every 5 years—our engineers test pressure, temperature and any concealed joints with an infrared camera. Should you extend or remodel, the same pipe can usually be cut and re-crimped, saving on future upgrade costs.