certainteed coil balance replacement ?

Quick Learner from san francisco
Hi, I need to replace my coil balance springs ... I'm certain I have an old style certainteed (without the nub) ...
My springs however, have a 10 J stamped on them ... they look like 171 springs, they are bronze colored, not silver ...

I can't tell for sure though ...

i weighed my window and it was 17 lbs ...
A customer submitted image of their coil balances.
4 Replies
Paul
Paul from SWISCO
SWISCO
Expert
Thanks for posting. Don't mind the color, that's not an important factor for this kind of spring. As for the spring, it looks like our Series 170 coil. For a sash weight of 17 pounds, I recommend our S170-409. See if you agree.
Quick Learner
Thanks a lot for taking a look ... the S170-409 looks like the best way to go ...

I'll do the experiment !
Quick Learner from san francisco
i just put the new springs in ... MISSION ACCOMPLISHED !

the trickiest pary was getting the pieces back in the window frame ...

it had to be pried open but nothing broke !
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