Hello,
Thanks in advance for your help!
Based on the information from your website, it appears that we have "block and tackle rod" style window balances. Upon closer inspection of our balances, it was not a big surprise to learn that the industry has discontinued the manufacture and use of this type.
Window details:
*Single hung window (vertical slider)
*Tilt sash
*Vinyl frame
*Bottom sash measures 26" W x 29-3/4" H (not including the two latches on top of the frame). Weight of bottom sash is 18.8 pounds. Glass opening is 27" H.
*Slot in window track is approximately 5/8" wide. The plastic clip that rests under the sash tilt pin measures approximately 1" wide.
Attached photos (my submission was limited to five):
01_Window Balance (all).jpg
09_Window Balance (sash tilt pin clip close-up).jpg
21_Window Balance - upper (in-situ).jpg
23_Window Balance - lower with string connection (in-situ).jpg
33_Window Track (empty).jpg
+++++
Please let me know if any additional information or photos are needed to identify suitable replacement window balances.
Regards,
Alan