SWISCO - The Replacement Hardware Authority

replace springs on Peachtree windows

A quick learner from Lapeer, mi says:
I have 2 windows which are identical in size, both with broken springs. the u-channels are 16.25 inches in length .5 inches wide. the number stamped on the u channel is "4240" I see the 16.25 assemblies but which is correct with the "4240" stamp.

Thank you,
Fritz
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Tom from SWISCO responded:
Thanks for posting! I'm not sure. Your stamp is a little different. If you're 100% sure the S745-16 is what you have, I recommend weighing your sash on a scale and referring to the chart we show on the S745-16 store page.
A quick learner from Lapeer, mi says:
Hi, thanks. I weighed the window pane on a postal scale and got about 25#. So would the stamp option be the 15.25-6?

Thank You,
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Tom from SWISCO responded:
I'm afraid the 15.25-6 balance won't support that kind of sash weight. However, it is also the heaviest available spring strength they make for it. Can you triple check the weight of the sash?
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