Prime Line Products H 3578 Twin Sash Balance 6 Lb Wood Window

Product Description

The PRIME LINE PRODUCTS H 3578 is a 6-pound twin sash balance designed for wood window applications. It provides the counterbalancing force needed to hold single- or double-hung window sashes in position during operation. Built from all-steel construction, the H 3578 uses coil spring retraction and aircraft cable lifters to deliver reliable, consistent sash support. Attaching hardware is included. This part is typically installed by glaziers, general contractors, or experienced maintenance technicians performing window hardware service or restoration on wood-frame window units.

This sash balance is rated for 6-pound sash loads and is suited for residential and light commercial wood window frames. It is appropriate for new installations and direct replacement of worn or broken sash balance hardware. The included attaching hardware simplifies installation on standard wood window channels. Package quantity is 5 units per pack, making it practical for multi-window service calls or batch replacements.

Key Features

• 6-pound sash load rating for wood window applications
• All-steel construction for durability
• Coil spring retraction mechanism for smooth sash operation
• Aircraft cable lifters for reliable load transfer
• Includes attaching hardware for complete installation
• Sold in a pack of 5 units

Compatibility

Compatible with ACME, Duplex, Superior, Preset, and Fabco window systems. Designed for use with wood window frames requiring a twin sash balance with a 6-pound load rating.

Installation Notes

Installation is typically performed by a glazier, window technician, or experienced maintenance professional. Before servicing, ensure the window sash is fully supported and the work area is secure to prevent accidental sash drop. Follow the window manufacturer guidelines and any applicable local building codes when replacing sash balance hardware. Inspect the window channel and attaching points for wear or damage before installing the new balance.