Channel Block & Tackle window balance

Window is broken so I could not take pictures of it installed.
Thanks!



Thanks for posting. Is the metal channel 34" long, not including the nylon attachments at both ends? If so, this is likely either an S380-34 or S385-24. The only difference between these two channel balance is the 'depth' of the bottom nylon shoe, or the 'heel-to-toe' measurement. See the diagram below for reference.

You then have to choose a stamp option, which designates the strength of the balance. The stamp on your old balance that would indicate this seems hard to read. I advise you weigh the window sash the balances support. You can use that exact weight to choose the right stamp option.




It looks like you can see the stamp in IMG_2658 that you sent in your first post--it's on the metal channel close to the end of the bottom nylon shoe. I can't totally see it in the photo. It might be 3340 but that's just a guess and not a confirmation. See what you can find. If not, weighing the window sash will be your best bet. And yes, if the shoe depth is 1", then it's an S380-34. Let me know if you have further questions.




My pleasure! Let us know if you need anything else, and many thanks for contacting us.