To replace the balances for my Simonton windows, I have determined that I need Pivot shoes #15-111, Supports #15-150D and 1/2" springs. The sash weighs 18 lbs. 4 springs are used per window. What spring number(lbs)should I use? The broken springs don't have any numbers on them. Will all of your 1/2 inch springs fit in the dual support? Also, where should the support be mounted along the track so that the springs are not over extended?
Paul from SWISCO responded:
March 13, 2017
If the sash is 18 pounds and you have four springs all told, I would use the S160-4. Each of these springs can individually carry 4.5 pounds, so four altogether should be perfect for your 18 pound sash.
