? Single pipe

[ajsdoc]

I have a heating system that works fine. New boiler this year, converted to sealed system, new unvented cylinder new controls new radiators, all good.
I had to take up the hall carpet to get access under floor (telephone problem) but noticed thar both pipes going to the radiator valves come from just the one pipe under there.
Does this mean I have a one pipe system? I've read about these they seem frowned upon. It was never mentioned during the installation, as everything works well I assume I just carry on regardless? We are planning wood floors soon so access would become more troublesome in the future.
Alk comments appreciated.

 

[45yearsagasman]

What you describe is certainly the way one pipe is fitted. It would be prudent to check a couple more rads before being sure. If it works ok and is sound then no further work required.