CI rads to multi zone pex-al-pex - bushings or reducers

Bry_2

I am adapting an black pipe system to a zoned pex al pex system but keeping my CI rads. Does it make a difference if I use iron bushings or reducers to reduce the pipe size from my rads to adapt to my 1/2" pex fittings. If I use SS or brass, do I need dielectric unions between the different metals? Thanks.

Tinman

Black iron bushings is the way I go on home run systems to old radiators. And I do not use the dielectrics on them.

Bry_2

What is the best source for black iron bushings going from 1-1/2 to 1/2"? I can find them online only from a few suppliers. I imagine most supply shops will have them. Thanks.

kcopp

Be careful cranking bushings into an old CI radiator. If you get too aggressive you may very well crack the radiator.... ask me how I know this...

Bry_2

Thanks. I usually go with dope and 1 - 1-1/2 turns past finger tight for all my fittings. Hopefully that will continue to serve me well.

Boon

You might want to consider sourcing domestic fittings instead of imported.