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
Help getting the right partThis discussion includes image(s). 6 Aug 9, 2018
Window balance (12/2)UNIQUE 27-C-30This discussion includes image(s). 2 Jul 10, 2018
Window balance 27-C-30This discussion includes image(s). 2 Jul 10, 2018
part is 28 inches but is marked 27cThis discussion includes image(s). 2 May 14, 2018
Unknown Vinyl Window Balancer 0 May 8, 2018
Need replacement sash balancers and locksThis discussion includes image(s). 8 May 7, 2018
Searching for unique channel balanceThis discussion includes image(s). 7 May 7, 2018
Window BalanceThis discussion includes image(s). 2 Apr 23, 2018
Start a new discussion
Use this form to ask questions or to share your experiences regarding this product. Every discussion will be reviewed and answered by our experts.
(your email address will be kept private and is only used to inform you when a response has been made)