Tilt Window Spiral Balancers

A quick learner from Maryland says:

Just want to be sure that I need 30" yellow tip 3/8" spiral balance. The windows are over 18lbs. and single hung.

Thanks for your help.


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Tom from SWISCO responded:

Hey, Greg. can you confirm the diameter of your balance? Make sure you're measuring the outer tube, not the internal spiral. Yours looks like it might be the thicker 5/8" version.

I also don't think your tips are yellow. They look like they're white tips that discolored over time. This is an  old style balance that isn't made anymore, so you probably want the red tip instead. 

Assuming you do have the 5/8" diameter S600-30, you should weigh your sash on a scale to confirm that the red tip is accurate.

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