Coil Replacement but not sure the weight.

Question

Hi there, I have need to replace, at the very least, a coil spring for my single coil balance system. There aren't any stamps or imprints of the weight on it. The pictures included have all the information I can see. Your help would be greatly appreciated. Thank you.

Lauren · Accepted Answer

Hello, thank you for posting,

Your pivot shoe resembles the 15-111 style that is compatible with the 1/2" thick Series 160 coils or the 3/8" Series 165 coil springs. Please review the dimensions below to confirm a good fit!

Alternate image for 15-111

To move forward, please confirm the thickness of your original coil spring and the weight of the window sash. The sash will need to be removed and placed on a bathroom scale. From there we can confirm the best option to support the sash when lifted. Thank you!