Sagging upper sash- window brake mechanism

Question

Trying to fix sagging upper sash in vinyl windows. These parts have a cord that connects to them. But they don

User submitted photos of window hardware.

Paul · Accepted Answer

You are showing the 15-014 knife lock shoes. The shoe is connected to a ribbed channel balance, the Series 751 balance. You need the metal channel length and spring weight stamped on the channel in order to place an order.