|
Bob from SWISCO responded:
July 8, 2020
This shoe looks like our 15-228, which uses either our Series 160 1/2" thick Coil Balances or our Series 165 3/8" thick balances. Measure the thickness of your old coil springs to confirm which you need. I am afraid those stamp codes may not be reliable. The best way to know what spring weights you need is to obtain the exact weight of the window sash. Give us that exact weight and we will work out what you need. |
|
|
Bob from SWISCO responded:
July 10, 2020
If the window weighs exactly 32 lbs, I would use three coil balances on each side of the sash (I know you may have only had two per side, but with coil balances the exact number of springs isn't as relevant as the weight they can carry in total). Use (1) of the S160-9 9lb springs as well as (2) of the S160-3 3.5 lb springs on each side of the sash. This equals 16 lbs of support on both sides, for a total of 32 lbs of support overall. For new support covers, see our 15-150T. To see how to install a triple coil balance system, see the video below. |
