Window channel balances

A quick learner from California says:
April 9, 2015
I need two pairs of springs. Could tell me if I have chosen the right ones. They seem to be 1/2 inch. Closest I could match are S351-26 option 2530,
S351-32 option3130

Thank you,
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
April 10, 2015
Based on these pictures, I agree that our Series 351 balannce is a good choice. However, I think your legnths are wrong. With a stamp like 3230, I would recommend a 33" long balance. With a stamp like 2630, you would need a 27" long balance. I recommend that you measure the metal channels to confirm.
A quick learner from California says:
April 14, 2015
Thank you, you are absolutely right on the length issue.

One more question, would replacing 3230 to 3240 make a big difference? Would it cause problems? All three windows have spring issues and I feel the windows are a lot heavier. Or should I stay with what the manufacture originally installed? All three windows with 3230 have failed when other smaller windows are mostly fine.
Profile picture of Tom
Tom from SWISCO responded:
April 14, 2015
If you're unsure about what option to use, I highly recommend that you weigh your sash. We have a chart on each Series 351 store page that lists each option and how much weight they can support. This is a great fall back method to use when you don't know what option to pick since the weight of the window doesn't lie.
27" Series 351 Channel Balance
27" Series 351 Channel Balance
S351-27
$10.77
33" Series 351 Channel Balance
33" Series 351 Channel Balance
S351-33
$11.52
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