Spiral balance replacement for double hung vinyl window

Question

I have ordered two 26-125 sash pivot bars and need replacement balance springs. I am replacing 35 inch "vinyl" tubes approx 5/8" diameter. Window sashes approx 35" tall by 33" wide, approx 20-25 lbs. No colors on current spring assemblies. Unsure what series to order

Tom · Accepted Answer

If this is a tilt window, and if the tube diameter is 5/8", I'd recommend the Series 600 spiral balance.