ok thanksfor your help.
so to replace the pipework it would mean a drain down.
followed by a refill with Senitnel X400. Allow this to circulate for a few weeks, then drain down again and re-fill and add inhibitor?
so to replace the pipework it would mean a drain down.
followed by a refill with Senitnel X400. Allow this to circulate for a few weeks, then drain down again and re-fill and add inhibitor?