I just had the service guy quote me over $700 to replace my leaking boiler pump. I need to do this myself, and the service guy was good enough to walk me through the procedure. I feel confident about doing the work, but less so about choosing the right pump. The current pump is a B&G series 100, 1/12 hp, 115 v, 1" flange. I've priced some pumps, and it seems I could save money (important right now) by replacing with a Taco pump. I'm just not sure what the critical specifications are to choose the right one. The boiler is in a one story house. Any thoughts would be much appreciated.