Coil balance

Home Owner from WA
Replacing the coil balances for a 23 year old bathroom window. The coil is 1/2" wide and is stamped with 64C.
From your coil replacement page it looks like S190. Can you tell me which one I need?
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5 Replies
Casey
Casey from SWISCO
SWISCO
Expert

Hello,

Since your 64C doesn't match any of our stamp options, I recommend weighing your window sash and dividing the weight by the number of coils in the window to choose the correct option. If you could show us the pivot shoe that the coils anchor to, that will help us confirm that the S190 is what you need. Thank you! 

Home Owner from WA
Here's the photo
1 user uploaded image
Casey
Casey from SWISCO
SWISCO
Expert

Your pivot shoe is our 15-180, which does use the S190 coil spring. I suspect that you need the S190-640, which holds 6 pounds of weight per coil, but it would still be a good idea to weigh the window sash to confirm. 

Home Owner from WA
Thank you so much!
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