Window Issue

A home owner from Canary Islands says:
May 31, 2023
Hello, I have 10 double hung tilt windows in my house since 23 years ago. But we've always had the problem of them sliding down by themselves after some years. I think the problem is that the windows are 33lb each (15kg) and the spiral balance are red-coded. I've been thinking about changing them to the black-coded ones, is that correct?

On the other hand, my pivot shoes' code is 530C, which ones should I switch them for?
Thumbnail of the uploaded file named Código zapata.jpg
Thumbnail of the uploaded file named Espiral montada.jpg
Thumbnail of the uploaded file named Espiral.jpg
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Emily from SWISCO responded:
June 2, 2023

Hello there!

Since you have a tilt window, my recommendation would be either the 3/8" Series 900 or 5/8" Series 600 depending on the diameter of the outer tube. There's a chart under the product description on the S900 and S600 store pages that will tell you what option is best based on the weight of the window sash. 

As for the pivot shoe, the 530C code has been associated with the 15-046 in the past but this is by no means a guarantee. I recommend you remove an undamaged version from the window and compare the specifications to ensure they match up. 
Pivot Shoe, 1/2" Thick
Pivot Shoe, 1/2" Thick
15-046
$2.15
How to replace a tilt window spiral balance.
How to replace a tilt window spiral balance.
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How to Remove a Pivot Shoe (Cutout Method)
How to Remove a Pivot Shoe (Cutout Method)
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Swisco's 15-046 Pivot Lock Shoe
Swisco's 15-046 Pivot Lock Shoe
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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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