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New cast iron radiators and the best connection methods
I recently purchased an older 1 level house. It has a forced hot water system running 2 copper loops to 7 cast iron radiators using monoflow valves. The radiators are just horrible. They obviously had leaked over the years rotting the floors (which I painstakenly repaired) and rusting the exterior of severa radiators to the point water is leaking from a section here and there. I don't want them restored. The cost is prohibitive compared to purchasing new radiators from ocsind.com.
My research says to pull the copper from the basement and scrap it along with the raditors. Then install a manifold system with pex al pex. Was thinking about using bulldog manifolds.
1. How many loops should I run? 1 for each rad? 2 rads on a loop?
2. What type of pex should I use? Fosta pex? Rifeng? Fosta is expensive. But it has a higher heat rating. Bulldog if I use bulldog manifolds as it is compatible?
3. What are the connections called that connect the pex to the rad? Excuse my ignorance with the names I use. The rads have 1 1/4 bottom tappings. So i screw in a open plug, insert a brass fitting with a spud wrench, attach another fitting that uses a compression fitting to connect the pex?
Any information would be much appreciated.