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S350-31 31" Series 350 Channel Balance
S350-31 31" Series 350 Channel Balance
Quick Learner
Mar 25, 2026
Quick Learner
Mar 25, 2026
Window balance . 31C
I want to identify the exact type to replace , it says 31C on the old one
Quick Learner
Toronto
Sep 25, 2025
Quick Learner from Toronto
Sep 25, 2025
Need help to pick the correct replacement balance
The part has "30C" stamped on it. It just slid out on its own when I opened the window and then the other side was loose so I pulled it out. One side had a broken string so that was the failure point. I imagine many other windows in the home (it's 25 years old) may fail at some point as well. The wi ... (cont.)
Quick Learner
Mountain View, CA
Jul 9, 2024
Quick Learner from Mountain View, CA
Jul 9, 2024
Replacement for 30 3 KN Caldwell balance is needed
Hi there, The stamp on the channel balance says " 30 3 KN Caldwell". Could you please suggest a right replacement and a compatible top sash? Thanks, Dmitry
Home Owner
Indiana
Apr 6, 2024
Home Owner from Indiana
Apr 6, 2024
Do you sell this 30C balance?
Hello! I have to replace the balances on my window. 30C is listed on the balance. It measures 31inches. What part do I need to purchase?
Handy Person
Valencia, CA
Jan 17, 2024
Handy Person from Valencia, CA
Jan 17, 2024
Window channel balance
I have two windows in need of balances. The home was built in 2001. There is no make or model found. The metal channel (without the ends) is 31" long. The metal channel sides exact width is 19/32" and the bottom of the "U" channel is 9/16". Stamped on the channel was 3040 BSI DL. I need four of the ... (cont.)
Quick Learner
Colorado
Dec 12, 2020
Quick Learner from Colorado
Dec 12, 2020
Channel Balance weight
Hello, I am replacing the balances for 2 windows in my condo, and am wondering if the highest weight rating you offer is equal to what the old ones are. I'm vaguely aware of how the rating works, but dont know what its equivalent would be for your products. The code on the balance reads 31 for the l ... (cont.)
Handy Person
46012
Jun 15, 2020
Handy Person from 46012
Jun 15, 2020
Channel Balance ID
I have 2 of these windows that are falling out because there is only one balance on them. Can you help me figure out what I need to repair these please? They wont stay open and you can simply pull them out without any effort. Thank you.Heath
Contractor
Michigan City, IN
Feb 6, 2020
Contractor from Michigan City, IN
Feb 6, 2020
Balance
The balance is 31" m-m, 5/8" deep, 1/2" wide.
Quick Learner
Alhambra, CA
May 12, 2019
Quick Learner from Alhambra, CA
May 12, 2019
Window Channel Balance
Hi. I want to replace 31" channel balance. House build 1920 but I don't know when the windows ere replaced. Marking is 3030V. Thank you.
Home Owner
New Richmond, WI
May 6, 2018
Home Owner from New Richmond, WI
May 6, 2018
Need to replace channel balances
These channel balances are 24 inches long ( the white metal part), and are 1/2 inch wide. Apparently are spring loaded with a little clip attached to the draw string that fits into a hole on the window frame. There is a number on the part B.S.I. 2320. I would need 2 of these, one for each side of ... (cont.)
Quick Learner
Tustin
Nov 10, 2017
Quick Learner from Tustin
Nov 10, 2017
Window Balance 3030 BSI LH
Hi, I need to replace a balancer for a Pacific Window Corp part. The balancer measures 1/2"W by 32"L. The part number stamped on it is 3030. I would like to know which of your parts to order for replacement. Thanks, TJ
Quick Learner
USA
Aug 30, 2017
Quick Learner from USA
Aug 30, 2017
Window balance and sash channel guide
I need to replace my window balance and sash channel guide. I think I found the correct balance part, but I would like to verify. The part is 1/2 inch, which I identified as S350-31. The marking on the part indicate 3030 (see pictures). Also attached are pictures of the sash channel guide, whi ... (cont.)
Friend
Wasta, SD
Sep 27, 2016
Friend from Wasta, SD
Sep 27, 2016
31" window palances
I need 2 31" window balances for our church window. The number stamped on them is 30DS 50L. What would be the price, plus shipping, if you havae these? Thank you!
Quick Learner
Jacksonville
Mar 31, 2015
Quick Learner from Jacksonville
Mar 31, 2015
Caldwell balances
I need to replace two of my window channel balances. They are labeled Caldwell 28 4 DM. They measure 29 inches and go in a window that is 30.5 inches. I think it's the S350-31 but I think the shoe is different than the 15-004. Also, I do not know what weight I need.
Quick Learner
Florida
Jan 30, 2014
Quick Learner from Florida
Jan 30, 2014
Channel Balance
I have a new house that uses S350-31 channel balance in the windows. The windows measure 51 x 32 and are single pane. It is very difficult to raise and lower the window with the balance installed. It is marked as 3050. Would I be able to use a 3040 weight and still be able to have the window st ... (cont.)
Home Owner
Denison , IA
Oct 3, 2011
Home Owner from Denison , IA
Oct 3, 2011
Channel balance, 30C B.S.I.
The channel balance series 350 what is the measurement of the bottom plastic guide? I have replacment window that are 25 yrs old & the company of business(do not know the name of company)....it has a number of 30C B.S.I. on the balance that is broken .