Coil spring

Thanks for reaching out to us. I see that you purchased the 15-177 pivot shoe. The Series 152 are the compatible springs. You'll need to check the band of the old coil spring for a stamped weight code.

Let us know if you have any other questions. 

No, the stamp would be on the tongue at the beginning of the coil spring. The stamp may have faded or it never had one to begin with. To determine the proper spring weights, you'll need to divide the sash weight by the total number of springs in the window. If you're still unsure, get back to us with the weight of the sash and I can calculate what you'd need from there. 

I'm afraid we can't determine what spring weight you'll need from this information. We would need the weight of the window sash, which is the glass pane that moves up and down. 

Thank you kindly! You have two options with this sash weight. You can either use one S152-5 5-pound spring on each side of the window or one S152-6 6-pound spring on each side of the window. One 5-pound spring on each side will total 10 pounds of overall support and one 6-pound spring will total 12 pounds of overall support. Either will be fine for you as long as the weights fall within a pound of the actual sash weight. The decision is ultimately up to you. 

For new coil spring supports, see the 15-143, 15-144, and 15-145. These parts "sandwich" over each coil spring. 

I'm happy I could help. I'll be here if you need anything else! 

That's fantastic news! I'm so happy we were able to be of assistance. 

Thanks so much for the update and please feel free to reach out if you had any other projects in the future we can help with.