MULTILAYER PIPES
WAVIN PRODUCT MANAGER UK & IRELAND ANDREW COY EXPLAINS THE TRANSITION TO PERT-BASED TIGRIS MULTILAYER PIPES AND WHAT IT MEANS FOR PLUMBING AND HEATING PROFESSIONALS… Future-ready pipework
With full implementation of the revised EU Drinking Water Directive (DWD) due by January 2027, Wavin is helping to prepare installers for stricter hygiene requirements and harmonised drinking water standards across Europe. Wavin Product Manager UK & Ireland Andrew Coy discusses the change across Tigris MP multilayer pipes, within the Tigris K5/M5 press-fit range, and what it means for installers and specifiers. What is changing in the Tigris K5/M5 MP pipe range? Wavin is converting its Tigris multilayer pipes from MP-PEX to MP-PERT. The key change is the inner pipe material, moving from PEX to PERT. The multilayer construction will remain the same: inner layer, adhesive layer, aluminium layer, adhesive layer and outer layer. The aluminium layer remains unchanged, with the same thickness and alloy. This helps retain the pipe’s strength and pressure performance, while the outer layer is being upgraded from PE-HD to PE-RT II. Why is Wavin making the switch? The revised EU DWD introduces additional hygiene requirements for materials that come into contact with water intended for human consumption. Wavin’s proactive move to MP-PERT supports full compliance with these stricter requirements, including limits around chemical migration, while maintaining performance across hot and cold-water applications. The transition supports improved environmental performance, with MP-PERT offering lower lifecycle assessment values than MP-PEX.
“Wavin’s proactive move to MP-PERT supports full compliance with these stricter requirements.”
1 Inliner: PEX to PERT 2 Adhesive layer - no change 3 Aluminum layer - no change 4 Adhesive layer - no change 5 Outer layer: PE-HD to PE-RT II
What are the sustainability benefits? MP-PERT pipes have a lower carbon footprint than MP-PEX pipes, less energy is used and PERT in liner scrap can be recycled. The LCA reduction improvement is up 6% based on A1-A3 ‘cradle-to-gate’ lifecycle assessment according to ISO 14040, ISO 14044 and EN15804. Where are these pipes used? Wavin MP-PERT pipes with a white skin are suitable and certified for drinking water and UFH, while Wavin MP-PERT pipes with a blue skin are only applicable for UFH given their thinner aluminium layer which gives them the flexibility required for this application. What about insulated options? Wavin offers insulated pipe options for thermal efficiency and fire safety requirements. Insulation thicknesses include standard 6mm and fire-rated options in 9mm and 13mm, available in white, blue and red. Potable water installations requirements on fire class depends on the building area with a minimum B-S1,d0 rating required in escape routes and A1/
A2 in technical rooms whereas a class E is sufficient in most other areas. Wavin fire- rated pipes use Climaflex Premium with a B-S1, d0 rating. When will the change happen? Sizes 16mm, 20mm and 25mm are being introduced now, with larger sizes following later this year to ensure installers are prepared. What is the key message for installers? MP-PERT brings future-ready compliance and improved sustainability, while retaining the performance, pressure ratings and application suitability expected from Wavin Tigris multilayer pipes.
Does MP-PERT offer the same performance as MP-PEX?
Yes. MP-PERT pipes are designed for the same application areas as MP-PEX and meet the relevant multilayer pipe standards, including ISO 21003 and ISO 22391. They are suitable for hot and cold-water systems and are designed to withstand temperatures up to 95°C for short-term exposure and pressures up to 10 bar.
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For more information about the Tigris K5/ M5 range or visit www.wavin.ie SCAN THE QR CODE TO FIND OUT MORE
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