Window balance replacement

Quick Learner from Florida
Nov 19, 2024 11:38 am
Need to replace both balance channels in my single pane window sash. They are stamped with a 28D and no other markings. I'm needing help determining the actual replacement for it as the single number/letter is apparently no longer used.
3 user uploaded images
4 Replies

Emily from SWISCO
Nov 22, 2024 8:44 am


Hey there!
Thank you for reaching out to us. Your balance resembles our Series 380 and Series 385. The difference between them is the depth of the bottom shoe so you'll have to measure as shown below to determine the proper replacement. Can you also tell us the length of the metal channel?

Comparison of the S378, S380 and S385 balance shoes.

Quick Learner from Florida
Nov 30, 2024 12:23 pm
29" is the length of the metal channel. My bottom shoe
depth is the 1".
depth is the 1".

Emily from SWISCO
Dec 2, 2024 8:33 am


Thank you! Since the bottom shoe is 1" deep, I recommend the S380-29. Your old 28D stamp doesn't match up with any of ours but it may translate to the 2840 stamp option. A pair of balances with this stamp will support a sash weighing 23 to 28 pounds. You can always weigh the window sash to confirm it falls within this range.

Comparison of the S378, S380 and S385 balance shoes.
Related Products
Related Videos
Related Guides