Watts Launches Microflex HP Pre-Insulated Pipe for Heat Pumps

Integrated Piping for Air-Source Heat Pump Installations

Watts has expanded its UK HVAC offering with the introduction of Microflex HP, a purpose-engineered pre-insulated piping solution designed specifically for heat pump installations. The system combines heating and cooling flow and return pipes alongside dedicated conduits for mains power and signal cabling within a single protective outer casing.

By housing all required fluid and electrical lines inside one flexible, insulated jacket, the design aims to simplify the external-to-internal connection process between the outdoor heat pump unit and the indoor distribution system. This integrated approach reduces the need for multiple wall penetrations and separate cable routing, helping heating engineers complete exterior pipework more efficiently.

What this means for buying and installing kit

What does this mean for a UK tradesperson or DIYer actually buying this kit — does it change what they should pay, buy, or watch out for? For plumbing and heating installers, specified all-in-one piping runs eliminate the hassle of manually pulling cables alongside insulated copper or plastic pipes and encasing them in separate trunking. While pre-insulated combined runs carry a premium upfront cost compared to purchasing standard barrier pipe, insulation lagging, and conduit piecemeal from merchants like Screwfix or Toolstation, the savings in labour time on-site are significant. Installers should check whether local heating stockists carry the exact core sizes and cable conduit dimensions required for the specific kilowatt output of the heat pump unit being fitted, as conduit capacities vary by manufacturer specification.

Streamlining low-carbon heating retrofits

As the UK continues to transition away from fossil fuel boilers under updated building regulations, installation speed and reliability are becoming critical for heating engineers. Systems that integrate physical water transport with electrical control wiring in a single robust sheath help minimise thermal losses while protecting critical cabling against weather degradation and mechanical damage over time.

Reported by PHPI Online — original article