Domestic oil supply pipes tend to be made of plastic-coated soft copper tubing so they can be easily manipulated. Commercial installations tend to be made of steel and can offer added protection from damage or vandalism. Steel pipes must not be galvanised and should be painted and maintained to reduce corrosion. Underground pipework should be avoided where possible as it’s difficult to detect leakage or damage and there’s a larger risk of pollution Above ground pipework must be positioned to avoid the risk of damage by impact and be protected against collision. It’s a legal requirement that the pipework is supported so it’s secure and cannot become loose...