replace springs on Peachtree windows

A quick learner from Lapeer, mi says:

September 23, 2016

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

Tom from SWISCO responded:

September 26, 2016

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:

October 15, 2016

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,

Tom from SWISCO responded:

October 18, 2016

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?

16-1/4" Peachtree Balance

S745-16

$13.79

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