31" Series 351 Channel Balance

Product Code: S351-31

31" Series 351 Channel Balance
Main product image of the S351-31 31" Series 351 Channel Balance
Measurements of 19-002 top balance shoe.
Measurements of 15-002 bottom shoe.
How to Identify Replacement Channel Balances
How to Replace a Non-Tilt Channel Balance
How to Repair a Jammed Window
Quantity Price
1-11 $10.75
12-49 $9.68
50-99 $9.14
100-249 $8.60
250+ $8.06
Please Note: Bulk pricing applies only to purchases of the same option
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Product Description
This is a Series 351 channel balance for non-tilt windows. It moderates the operation of your window sash using a specifically calibrated spring and pulley system that allows the window to stay open when raised.
  • This balance has a 31" long metal channel. When determining the length, do not include the attached fittings. Only measure the metal channel.
  • Comes fully assembled with the 19-002 top and 15-002 (1" deep) bottom fittings and will be ready to install out of the box.
  • The strength you need should be indicated as a stamp or imprint on your old metal channel. If you do not have a stamp, or cannot match it up to our options, weigh your sash on a scale and refer to the chart below.
  • The width of the metal channel measures 9/16" but is considered 1/2" in the trade.
  • Can work for either the left or right side of the window interchangeably.

  • Stamp Option Sash Weight Range
    3010 7 to 12 lbs
    3020 12 to 16 lbs
    3030 16 to 23 lbs
    3040 23 to 28 lbs
    3050 28 to 32 lbs
    3060 32 to 35 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.
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
Please help me identify the right channel balance to orderThis discussion includes image(s). 2 Jan 31, 2021
Looking for replacement window channel balance for my vinyl windowsThis discussion includes image(s). 4 Sep 27, 2020
Need window channel balancersThis discussion includes image(s). 4 Aug 15, 2020
Replacement channel balance? This discussion includes image(s). 3 Jul 11, 2020
Need help to choose right series - channel replacement part - 1/2" wideThis discussion includes image(s). 2 Jun 26, 2020
28.5 S351 seriesThis discussion includes image(s). 4 Jun 19, 2020
Window Channel BalanceThis discussion includes image(s). 2 Jun 3, 2020
31" Channel Balances NeededThis discussion includes image(s). 2 Mar 1, 2020
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