Replacement Coil Balance

Home Owner from Front of house bottom window

Jun 3, 2026 7:17 am

Can you tell me the coil balance part number for the window? The window weighs 21lbs. I have included a picture of the label on the inside of the window. They are in Part # 801020,

Product Code: 15-150D

1/2" Coil Double Support,

Thanks

Jim

3 user uploaded images

4 Replies

Emily from SWISCO

Jun 9, 2026 12:52 pm

Hi there Jim!

Thank you very much for bearing with us during this busy season. We're happy to help with this, but we will need to see a photo of the pivot shoe. If we can ID that first, we can determine the compatible coil balances.

Home Owner from Front of house bottom window

Jun 9, 2026 2:34 pm

Attached are the photos of the pivot shoe. I noticed on one of the coils it has a stamp that i believe is:

#4.5 35

Thanks

2 user uploaded images

Emily from SWISCO

Jun 10, 2026 8:33 am

Thank you, Jim! We don't sell this exact shoe, but we recommend you consider the 17/32" thick and 1-1/4" wide 15-199. Review the specifications and see how they compare with your old shoe.

Our shoe is designed for use with the 1/2" S160 coil springs. The #4.5 stamp indicates the weight of the coil spring. If there is a total of four of these used in the window, that would be 18 pounds of overall support, which would be too light for the 21-pound sash.

If the window weighs 21 pounds, we'd recommend using two S160-05 5.5-pound springs on each side of the window. This would total 22 pounds of overall support.

Please let us know if you have any questions.

Alternate view of 15-199