Hello! I need to replace my Simonton window coil balance. There is more info below:"30 3/4 x "42 1/2H-R25-48x80Series: 07-09 DH P.L* 063-044CONFORMS TO: ASTM F 588 and HUD UM 11I'ved watched this video but I am not sure which Coil Spring weight I will need: https://youtu.be/wJgNG8giUuc
Qty 2 15-259 shoe
Qty 2 S159 which weight do I need?
Qty 2 15-255 coil support
Qty 2 26-083 pivot bar
Please let me know what other info you need!
Which weight coil spring do I need? Simonton window coil balance replacement
Quick Learner from Rochester, NY
Aug 10, 2025 8:08 pm
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4 Replies
Bob from SWISCO
Aug 10, 2025 11:54 pm
Thanks for posting, and nice job getting this far. To know what spring weights you need for the new Series 159 Coil Balances, weigh the window sash that these balances support. A bathroom scale will suffice. Give me that exact weight, and I can work it out for you.
Quick Learner from Rochester, NY
Aug 16, 2025 8:49 pm
Hi Bob! Thanks for getting back to me! So the one window is 15 pounds. We have another window that also needs both coil balances replaced (top and bottem) and that one is 15.6 pounds. Please let me know what is the proper Coil Balance to order. Thank you!
Bob from SWISCO
Aug 18, 2025 1:20 am
For both windows, you're fine just using a pair of the S159-07 7.5 pound springs, one for each side of the sash. This will equal the exact weight of the 15 pound window; for the 15.6 pound window, you'll be within one pound of the reported sash weight, which works just fine. Let me know if you have further questions.
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