While PEX is less at risk of freezing than copper (plastic doesn't conduct cold the way metal does), both types of pipes need to be protected if they're exposed to the weather. You don't, however, have to insulate gas pipes. These are made of galvanized metal, which typically appears dull and heavy.
What pipes need lagging?
The Pipes That Need Lagging
- The pipes in the airing cupboard – the hot water pipes running to and from the cylinder.
- The pipes running from the boiler.
- Your central heating pipes – all central heating pipes should be lagged as they go to the radiators. ...
- The hot water pipes under sinks and behind the bath panels.
What kind of pipe is best to supply gas?
The primary purpose of black steel pipe is to carry natural gas into homes and businesses. The pipe is manufactured without a seam, making it a stronger and safer pipe to carry gas. The black steel pipe is also used for fire sprinkler systems because it is more fire-resistant than galvanized pipe.
