Window Spiral Balance and Balance Bar Replacement

Question

Spiral Balance:

Tube dimensions: 1-1/8" W x 4-1/4" H x 1/2" D
Double coil spring
2-screw mount

Balance Bar (sill shoe/guide):

Square profile: 1/2" x 1/2"
Bottom of window opening

Double hung vynl window likely 20 years old. Probably weighs 25lbs.

Bob · Accepted Answer

Hello there. This is a coil balance system. Specifically this is an older version of the 15-177 pivot shoe, which works with Series 152 Coil balance springs sold separately. For new coil covers, see the 15-143, 15-144 and 15-145, which sandwich around each individual coil. For the pivot bars, we need to see an original one to narrow it down. Removing one and showing us would suffice. Many thanks.