Double hung tilt out window

Question

My bottom window does not seem to be engaging the spring to lift the window open

Casey · Accepted Answer

Hello,

We can't be sure with the hardware still installed but the S770-37 (37B) would be a good place to start. Take a look and confirm your channel measures 37" long and installs with a screw at the top.

Close up view of the Series 770 balance top.

Close up view of the Series 770 balance bottom.

We also offer the 15-129 pivot shoe commonly used with this assembly. Take a look and confirm the specifications below match yours. Thanks for posting!

Detail of 15-129