coil balance

Quick Learner from watertown,ny
Sep 21, 2020 11:13 am
# 3 on back
pat.# 6,983,513
# 5,371971
IMG_1342 IMG_1340 IMG_1337 IMG_1338
4 user uploaded images
1 Replies
Bob from SWISCO
Sep 25, 2020 10:25 am

This looks like an older version of a Series 140 Coil Balance system. Now, if the '3' is on the coil spring itself, then you'd need an S140-3 3 lb system. If not, and you're uncertain what spring weight you need, obtain the exact weight of the window sash. You can then divide that weight in half, and that will tell you the spring weight you need for both sides of the sash. 

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