Window Balances : SWISCO.com

Home Owner from Murrells Inlet South Carolina

Jan 30, 2023 11:43 am

Hi,
I need two new window balances. The metal channel on both is 28" long. They have 27D and what looks like 3.S.I. stamped on the metal. I've taken pictures to hopefully help identify them.

5 user uploaded images

7 Replies

Casey from SWISCO

Jan 31, 2023 10:56 am

Hello,

With this combination of attachments, you could have either the S380-28 or S385-28 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

You'll also need 2740 spring strength options for your replacement balances. Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.

Home Owner from Murrells Inlet South Carolina

Jan 31, 2023 12:38 pm

Thanks Casey!

I just ordered two of the S385 Balances with the 2740 springs.

Home Owner from Murrells Inlet South Carolina

Mar 11, 2023 10:47 am

Hi,

I just installed the new balances but the window isn't catching them on the way down. So the balances aren't attaching to the window.

The plastic pieces on the window are brittle. The left side catches the balance and then it flies off partway down.

5 user uploaded images

Casey from SWISCO

Mar 14, 2023 8:36 am

I'm sorry to hear that you're having trouble installing your balances. Your top sash guide reminds me of the 18-061 at first glance but the dimensions would be the determining factor. Take a look and compare the specifications below to your part. If you notice any discrepancies, please write out your exact measurements and we can go from there.

Unfortunately, I do not recognize the metal bracket that is also shown in your photos. It seems like it could be part of the sash frame. If so, unfortunately, that is not something that we can supply and would be specific to the manufacturer.