How to Plumb a Hot-water Heating System

My buddy Eks just replaced his host-water furnce with a high-efficiency unit.

Can you tell that Eks is an engineer?

The plumber used one of those fancy pipe-compression tools that mashes the mating parts together with an O-ring for sealing. Faster and safer than sweating the joints together, but I want to fast-forward two or three decades to check out the durability.

As he put it, “You may be able to get a better furnace installation, but you probably can’t pay any more for it…”