block and tackle window balalnce

A home owner from San Francisco says:

Hi there!

I thought I would have to replace my whole window, but then I found your website. The old vinyl sash window has no brand name that I can find.

The sash weighs about 17 lbs. I don't have the hook part you ask for in the video. I think i threw it out with the broken cord. I hope I have provided enough information for an identification.

Thanks

Paul 

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Lauren from SWISCO responded:

Hello,

It looks like you have either our S351-24 , with a 15-002 bottom attachment, or S390-24 , with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. If take out clips are needed, please see our 16-002 .

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.

The spring strength you had was a 2340, but since your window sash weighs 17 pounds I would recommend using stamp option 2330 instead so the window sash functions properly. Please let me know if you have any questions. 

A home owner from San Francisco says:
Hi Lauren,
Thanks so much for your response. It was extremely helpful. I am going to go with the S390-24 with the 15-001 bottom attachment. I'm going to order 3 just to have an extra on hand. I have also ordered some top sash guides and take out clips. I think this is going to work.
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Lauren from SWISCO responded:

Great to hear! Please let us know if we can assist with future repairs. 

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