double coil on a single hung window

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Contractor from Wilmington NC

Jul 8, 2024 5:06 pm

hello,

the only numbers I could find on the coil balancer is

0m137 on image on window part #3

4.610.108 on the 2 coil covers on image part #2

Thank You,

Todd

3 user uploaded images

6 Replies

Jasmine from SWISCO

Jul 9, 2024 10:53 am

Hi Todd,

Thanks for writing in! Your balance shoe is the 15-111 Pivot Shoe which is used along with the 1/2" thick Series 160 Coil Balance. To determine which spring you need for your assembly, you'll need to take a look at the metal coils for any stamps/markings. If there aren't any on the coil itself, you'll need to obtain the exact weight of the sash. Then you'll divide that number by (4) or the total number of coils in the window.

To replace the cover I suggest the 15-150D Coil Double Support. You may also need the 15-148 Bumper.

Alternate image for 15-111

Contractor from Wilmington NC

Jul 9, 2024 12:37 pm

perfect. thanks for the quick response. I will determine the weight of the sash and get these parts ordered!

Contractor from Wilmington NC

Jul 9, 2024 4:31 pm

So I found the number 3 on the old coil balancers. There are 2 on each side of the window which makes sense because the window feels about 12 lbs. Since I am rebuilding the entire balance system on all the windows could I go back with a single coil system with 2 6lb. coils on each side? Or is it better to stick with the factory set up and do the dual coil system with the 3lb coils? Also if I order all the parts for the windows and the first one doesn't work can I return the rest if un opened?

Jasmine from SWISCO

Jul 10, 2024 8:40 am

Okay, great! I believe you should be fine with using just the single 6lb coil on each side. You'll just need to use the 15-150S single cover instead of the other.

Per our return policy, you can return any parts that are still in their original condition. Our full policy can be reviewed here.

Contractor from Wilmington NC

Jul 10, 2024 2:58 pm

Thanks Jasmine. You Rock!