I'm replacing my complete system and had 4 quotes.
Combi system quoted by all.
BG rep says they won't use any pipes but only copper. No real reason given other than "it's proven" and plastic isn't. (He's by FAR the most expensive)
Two quoting "Hep" barrier pipe with copper tails into rads and boiler.
The last claims that barrier plastic pipe still allows oxygen to penetrate plus the push fit joints also allow oxygen into the system. Reckons he's seen plastic piped systems where the rads have corroded within 5 years or less. He proposes using pipe which is a combination of plastic outer and copper inner. He called it some name but can't remember it and I can't find anytrhing on the web relating to it.
Any truth in the last one's claims?
If do, will inhibitor prevent the corrosion
Thanks
Combi system quoted by all.
BG rep says they won't use any pipes but only copper. No real reason given other than "it's proven" and plastic isn't. (He's by FAR the most expensive)
Two quoting "Hep" barrier pipe with copper tails into rads and boiler.
The last claims that barrier plastic pipe still allows oxygen to penetrate plus the push fit joints also allow oxygen into the system. Reckons he's seen plastic piped systems where the rads have corroded within 5 years or less. He proposes using pipe which is a combination of plastic outer and copper inner. He called it some name but can't remember it and I can't find anytrhing on the web relating to it.
Any truth in the last one's claims?
If do, will inhibitor prevent the corrosion
Thanks