16mm Novatherm Premium PEX-AL-PEX Pipe – WRAS ApprovedNovatherm Professional Grade WRAS Approved Pex Al Pex Pipe 100m coil PEX AL PEX Underfloor Heating Pipe is an ultra high quality, safe and reliable European manufactured product with a 50 year pipe warranty. The pipe consists of; cross linked polyethylene inner, a central core of aluminium alloy which also acts has an oxygen barrier, another layer of adhesive is then added before another layer of cross linked polyethylene. The layers of adhesive bind