Tom from SWISCO responded:
March 16, 2012
Thanks for submitting your pictures to us.
It does look similar to our Series 770 Balance, however we want to confirm the stamps and markings on your current balances. I noticed in the subject it reads "21--30", are those the stamps? If not, do you see any markings on the channel? |
Tom from SWISCO responded:
March 19, 2012
Thanks for getting back to us.
In order to accurately identify the correct balance replacements, we will need the exact channel length of each balance and the markings printed on those balances. The markings are very important, as they denote the approximate window sash support weight. You may also want to confirm the weight of your window sashes by removing the window sash and placing it on a scale. |
Tom from SWISCO responded:
December 17, 2012
Thanks for posting! Yes, I would also recommend the 22B stamp, which can carry 10 through 16 pounds. Just make sure you double check the weight of your sash to make sure that it is 16 pounds exactly. If it's over, you may want to consider the 22C option, instead. This can carry 16 through 21 pounds.
I'm not sure why your old stamp was marked 21 when it was 22" long. Usually the first two digits of the stamp for these balances match the length, but I guess it depends on who manufactured it originally. |