channel balance replacements

Question

PGT (SH4000 series) single hung window in FL that measures approx. 51 x 56.
The imprinted inscription (as seen in pic above) is 25 9 OJ BSI The metal part of the channel balance above is 26 inches.
I have not been able to find any replacement thus far. The window itself is in good shape, but approx. 20 years old.
I have seen some channel balances online - but nothing that matches the above numbers exactly. I do not know enough about windows to know what would happen if I use something a part such as 25 70. Please advise. Thank you so much for your help.

Jasmine · Accepted Answer

Hey there,

Thanks for writing in! Your balances look like they could be either the S351-26 with a 1" Shoe or the S351-26 with a 1-1/8" Shoe. To determine which series is needed for your window, look over the dimensions from the diagram below to confirm the depth of your bottom shoe.

Comparison of the S378, S380 and S385 balance shoes.

Once you've confirmed the series you need and you are ready to place your order, you'll need to confirm the stamp from the metal channel to select your option. Unfortunately, we are not able to cross-reference the stamp from your balances with ours. With that said, you'll need to obtain the exact weight of your sash. There will be a chart that lists the weight ranges each stamp option can hold to support the weight of a sash.