Replaced circulator pumps for first boiler which had a Taco0010, replaced master radiant floor circulator, master bedroom circulator and upstairs bedroom circulator, all old pumps were noisy and master bedroom pump was seized, hooked in all wiring and tested for leaks, tested zones to make sure supply and return were hot, also labeled all zones which customer and I went through whole home and discovered what zones were what, system operational and working.