window balance

A handy person from Washington state says:
May 6, 2022
On the metal rolls is stamped 731v on one and 536v on the other. Size is about 1 1/8th inch wide, 9/16ths thick and 5 5/8ths long. It is a 30 pound tilt window made by CDI.
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Casey from SWISCO responded:
May 9, 2022

Hello,

I would recommend removing an undamaged coil balance assembly from your window to compare to the 15-087 housing pivot, which uses the Series 180 coil springs, along with the related items shown on the 15-087 product page. 

For a 30-pound sash, I would recommend using one S180-9 and one S180-6 on each side of the sash. Thanks for posting! 
Coil Housing Pivot
Coil Housing Pivot
15-087
$5.97
Tandem Coil Housing
Tandem Coil Housing
15-086
$1.68
Mounting Bracket
Mounting Bracket
16-024
$0.66
9 lbs Series 180 Coil Balance
9 lbs Series 180 Coil Balance
S180-09
$5.22
6 lbs Series 180 Coil Balance
6 lbs Series 180 Coil Balance
S180-06
$4.45
How to remove window pivot shoes
How to remove window pivot shoes
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Anatomy of a tilt window
Anatomy of a tilt window
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How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
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Removing a Triple Coil Window Balance
Removing a Triple Coil Window Balance
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