converting gravity system to pump forst

ph

i am looking to convert a gravity heating system to a forested pump system with a new boiler i have 2 21/2" supply's and 2 11/2" returns i am wandering how to pipe the near boiler piping

thanks in advance

kcopp

here are a couple...

great articles... http://www.heatinghelp.com/article-categories/332/Gravity-Hot-Water-Heating

generally speaking you can cut your piping in half and then reduce 1 pipe size. So 1" will work. DONT over pump it! a small circulator will work fine. you are trying to mimic the gravity flow.

ph

how to repipe

if this was my system how do i re-pipe it with the new boiler and pump

jumper

didn't new boiler come with circulator?

Use transitions from new small pipes to old large. Supposed to be better than simple bushings. Biggest issue is expansion tank. If it's open you may want to consider closed.