does anyone know where to get this boiler heading piping?

Those look like Victualic couplings -- or something very similar. They're readily available. Graingers, if your local plumbing supply house doesn't have them.

They are not Victaulic.

Both Slant Fin & Hydrotherm used those on their modular boilers. They are still available as far as I know. We used to get them from the boiler mfgs.

They were made by Eaton now owned by Danfoss

Google: "Hose Warehouse" they have them

@WMno57 beat me to it

If there is the will, these is probably a method of operating that heating plant that would be much, much more efficient than that current piping layout. From the looks of things, it looks like all the units are pumped together and then probably fired as needed. That creates a lot of wasted heat

@Jamie Hall

If you click on @WMno57 's link it shows pictures. The don't groove the pipe like Victaulic they flange it.

Back in the 80s and 90s modular boilers were popular. In my area Hydrotherm was the big name and they just piped a bunch of little boilers in parallel and had a staging control along with outdoor reset to stage the boilers. They worked pretty well on hot water. Slant Finn also had a version. It was the "multiple small boilers versus one large boiler option" There are still a lot of these running

They had a steam set up as well........didn't work so good.


The pipe couplings above came with the boiler and the supply and return headers were premade and supplied by the boiler mfg. for easy assembly. They worked pretty well but could leak over time like anything with a rubber gasket, especially if overheated.


I have seen similar connections used in SS food process piping, breweries and soda plants where they may need to disassemble and clean the piping