wtxing
New Member
Installed Ultra `155 with factory 1 1/2 header. Came with Taco 0014-F1 (32 gpm max) circ pump. Attached 1 1/4 copper to input and also to output of header. My heating system has several zones all driving the return water by Gruundfos pumps with 17 gpm rating. Return water temp at the 1/4 inlet pipe is 100 deg. The temp as it enters the boiler, after the Taco pump, is the same as the output temp 160 deg. I suspect the the Taco pump is over powering the return water and looping thru the primary loop back to the boiler input. Asked Weil Mclain support if I could change the Taco with the same Grundfos used in my heating system and they said no. Any suggestions on how the solve this besides replacing all my heating system pumps with ones that have the same gpm as the Taco ?