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Do I need to tear apart the Taco 219 Flo-Check prior to soldering? I checked their web site but can't find installation instructions. Tahnks

Should I be using black pipe to replace the supply and return manifolds connected to my cast-iron boiler. Or galvanized? Currently the setup has black pipe. I'm planning on using brass fittings between the copper and iron. Also, about how much torque should be applied to tighten the...