I'm looking at a home built in the 80's with hydronic radiant in-floor heating embedded in concrete slab. I've never seen this type of hydronic tubing before. I'm pretty sure that the attached photo shows the manifold where the copper piping from the boiler transitions to rubber in-floor tubing. There were several sets of manifolds like this - each associated with a different part of the house. I couldn't follow the copper pipes to be 100% sure that they are connected to the boiler. The rubber is quite soft and stretchy. I was wondering if anyone knew the manufacturer's name or the name of this type of system so I could research it. Or if anyone has any first-hand experience regarding it's reliability, that would be great.
I am starting to find some references out there (but none testify as to it's reliability):