Only pipe rated for the required temperature and pressure should be used. Barrier pipe is commonly specified for sealed heating circuits, subject to the system instructions.
Barrier Pipe Systems for Flexible Plumbing Routes
Plastic pipe makes long plumbing runs possible with fewer joints and easier routing around a building. MacBlair stocks 15mm and 22mm barrier pipe and pipe-in-pipe products from systems including Polyplumb, Qual-PEX, Easy Lay and Hep2O.
Keep each system’s pipe, fittings and inserts together unless cross-compatibility is formally approved. Cut the pipe square with the correct tool, fit the specified insert, mark the insertion depth and push fully home. The broader plumbing fittings range covers connections for planned transitions.
Barrier layers limit oxygen entering sealed heating systems, while pipe-in-pipe provides a protective sleeve around the service tube. Check the product rating for temperature, pressure and application before using it on heating or hot-water circuits.
Support the pipe, allow for movement and protect it from sharp edges, sunlight and excessive heat. Where rigid exposed pipework is preferred, compare copper plumbing tube. Use pipe clips and covers to keep visible runs aligned.
Plastic Pipe FAQ's
Most plumbing systems require the manufacturer’s correct insert at every fitting. The insert supports the pipe end and forms part of the approved joint.
Not unless both manufacturers approve the exact combination. Outside diameter alone does not confirm compatibility between seals, inserts and pipe construction.
Boiler manufacturers often require a minimum length of metal pipe close to the appliance. Follow the appliance and pipe-system instructions, including heat clearances.
Use a dedicated cutter for a clean square end, insert the specified support sleeve, mark the socket depth and push the pipe fully into the fitting.