Series 380 or 385 Sash Balance?

Question

I want to replace a broken sash balance and am unsure as to which Series I need. It appears that the top is a #19-005 but I'm not sure of the bottom. Hopefully you can identify from the attached images. the shape is similar to #15-004 or 15-005.

The sash balance is 33" in length and marked "3250" I'm assuming the lift weight marking is B.S.1. There are no other stamps on the balance so I would also need to know what the cross reference weight is for ordering the Swisco part.

Thanks in advance for your help. The resident in this rental property would be happy to get this window working again.

Regards,
Rich

User submitted photos of a window balance.

Tom · Accepted Answer

Thanks for posting. I can't tell what shoe this is without knowing its exact dimensions. The major difference between the 15-004 and 15-005 lies in their depth. Check out the image below and let me know which is a closer match.

Comparison of 15-004 and 15-005

As for the option, the 3250 is what you want to focus on. That usually corresponds to our 3250 option, but you might want to weigh your sash just in case. Once you've determined your balance Series, and once you've selected the length, you will see a list of options that balance has and how much weight a pair of each can support. You should weigh your window sash to confirm that the 3250 is correct.