Certainteed Balance Springs and Connecting Blocks

A home owner from Brunswick, Maine says:
Please see attached a photo of two different Certainteed balance assemblies. Both connecting blocks have the same dimensions. Approx. 1 1/4 in.wide by 7/8 in. deep by 1 1/2 in. tall. The single spring ass'y fits a smaller window that measures 24 in wide by 26 7/8 in tall. The double spring ass'y fits a larger window that measures 36in wide by 30 5/8 in tall. The springs are attached to the blocks by a phillips head screw. These are the dimensions of each window sash. could you tell me what block ass'y and springs I need to order.
User submitted a photo of a coil window balance.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. The shoe resembles our 15-155. Do you agree? If so, see our S170-407 spring for the single-coil balance and our S171-407 and S170-408 for the double-coil balance.
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)