window balance and bracket identification for replacement

A quick learner from Mobile, Alabama says:

Hello:

The balances that I am trying to replace are in a double aluminum window in a rental house. I do not know the age or brand of the window, but I would estimate it to be over 40 years old. The window will not stay in the up position. All four balances need to be replaced. The information that I do have to help identify the correct balance is as follows:

  • I will need 4 balances and brackets
  • 3/8" diameter balance tube 
  • 24 15/16" length of tube
  • No plastic (or nylon) tip

The window is a single pane, aluminum, non-tilt window. It appears to be an inexpensive, light weight 'builder grade' window that I do not see a method to remove the sash, but no difficulty removing the balance. The sash is approximately 34" wide and 25" tall.

Since I cannot remove the sash to weigh it, I would estimate the sash to weigh less than 20 pounds

Thank you for your assistance

***Looking at the S-400-25 - it looks like a match - but the bracket looks different

***Looking at bracket 17-031 - it does not look like mine, but it looks like it would work

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Tom from SWISCO responded:

Thanks for posting! If you have a builder's grade window, then our Series 400 is a good place to start. You mention that the bracket looks different, though. Are you referring to your equivalent of the 17-031, or the "butterfly" clip at the end of the Series 400 spiral tip? Could you show us a picture of your bracket? If we can see it out of the window, we will do our best to find a closer match.

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