Barriered Plastic Piping?

[Sapper]

I've just given a plumber the keys to my house so that he can spend the afternoon running the pipework for my central heating system.

The problem is, he came into the house with armloads of plastic pipe. Now he said there would be no problems, but I've looked elsewhere in this forum and I see that plastic pipe needs to "barriered" in order to be suitable for a central heating system.

Can anyone tells me what barriered pipe looks like compared to non-barriered before I go back and part with the readies?

 

[ollski]

Almost certain to be these days as the cost is low, but basically if you look at the end of the pipe you should see the pipe in 3 sections in layers, middle section is the barrier.

 

[Sapper]

Ta muchly Ollski

 

[PEDANTICVINDICTIVEMAN]

Hep20 barrier has red writing on the side saying so, the standard pipe has blue writing but can be used for CH as long as a suitable inhibitor is used, no problems with either.