Double Hung Spiral Balance Springs

Question

The spiral balance spring in my double hung window snapped.  It's a replacement window from 2007.  Don't know the manufacturer; no visible signs of who the manufacture is on the window or sash.  Attached are pics of the part installed and removed.  Hopefully you can help.

Paul · Accepted Answer

From your photos, it looks like you just need to replace the broken coil spring. If the coil spring is 1/2" thick, I recommend our Series 160. You will need the number stamped on the old spring when ordering.

As for the pivot shoe, our 15-228 should work, as well as our 15-150S coil spring housing.