28" Series 770 Balance

Product Code: S770-28

Product Description
Series 770 replacement 28" block and tackle channel balance system for a tilt window. Sold individually.
Stamp Option Sash Weight Range
B 12 to 18 lbs
C 18 to 23 lbs
D 23 to 28 lbs
E 28 to 32 lbs
F 32 to 36 lbs
*This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
Helpful Tip!
This part does not include new fasteners. Do not throw away your original screws, you will need them for the installation of your new part.
Good Idea!
Balances are sold individually, however, it is a good idea to replace both window balances at the same time. Pairing a new balance with an old one would cause the new balance to wear out faster.
Helpful Tip!
The stamp option represents the strength of the channel balance. Locate the stamp on your channel balance. If your stamp does not match any of the stamp options available or you are unsure of which stamp option you should choose: ask our experts for help.
Customer Questions & Answers
Discussion # Of Replies Last Post Date
Need help identifing partThis discussion includes image(s). 2 Dec 9, 2018
block and tackle window balance replacementThis discussion includes video(s). 2 Dec 6, 2018
Parts neededThis discussion includes image(s). 2 Oct 24, 2018
PGT Window Channel BalancerThis discussion includes image(s). 5 Oct 23, 2018
Which parts should I get?This discussion includes image(s). 2 Oct 10, 2018
37 pound sash balancers needed Pancio jobThis discussion includes image(s). 4 Oct 4, 2018
Window Balance for old Rivco, 1 1/2 Unique 28-C-30This discussion includes image(s). 3 Sep 19, 2018
Do you have these window parts?This discussion includes image(s). 2 Aug 31, 2018
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