Window Balance
Hi there!
Thank you for reaching out to us. I believe we can help with this, but I'm going to confirm a few details on our end. I'll reach back out as soon as we have more information.
In the meantime, can you confirm whether this balance uses a screw or a hook to install?
We believe you can use our S795-27 tilt balance with the default 1-1/4" T-Lock shoe. The original balance shows (27B) stamp that will hold a window sash weight between 11 to 17 pounds. For a 40-pound sash, you would need a stamp weight code (27H) for a sash weight between 38 to 42 pounds.
Please note that the Series 795 is designed to use a screw. If your balance uses a hook, please let us know.