Hi silvertails plumbers, I neer to move my hot water system as it currently sits right outside what will be the new kitchen window and on what will become the deck. I havr a mate doing the wiring and I am just going to use the pex plastic pipe. I am going to keep the current entry point as these pipes will be hidden under a bench top. I was then going to use the plastic push together pipe to take the pipes straight down to deck level then run them 90 degdees along the wall for 3m under a pipe and back into the heater. All of this is simple enough. Now its fairly warm up here year round, however I was sondering whether j should insulate the hotwater return pipe or whether the plastic really needs this like the copper pipe? I assume it doesbt conduct heat and xold as much as copper and therefore there wont be much heat loss and likewise they shouldnt be too hot to touch. I am eventually going to hide them behind conduit and was thinking oc spraying spray foam indside the conduit. More or less my question is do I need insulation and is this setup ok?