Need to ID Certainteed balance spring

Home Owner from Charlottesville VA
Hi.

I need to ID a Certainteed balance spring. It has no markings or stamps I can find. The sash weighs 12 lbs and measures 22" high x 24" wide.

Thanks!
Ian
4 user uploaded images
2 Replies
Bob
Bob from SWISCO
SWISCO
Expert

Hey Ian. This looks like a 15-192 Certainteed Pivot Shoe, which uses Series 170 and Series 171 Coil Balances. For a 12 pound window, use the S170-406 6 pound spring, one on each side of the sash. This equals 12 pounds of support overall. You can reuse your old coil covers if they're undamaged--otherwise, see our 15-156 and 15-157. Let me know if you have further questions. 

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