Thermwell RV46H Vinyl Threshold Insert Gray 36 Inches

Product Description

The THERMWELL RV46H is a gray vinyl threshold insert designed to replace worn or damaged seals in adjustable Macklanburg Duncan thresholds. Measuring 1.25 inches wide by 36 inches long, this insert fits directly into compatible adjustable threshold tracks, restoring the door-bottom seal that reduces drafts and moisture intrusion. Installation requires no special tools in most cases, making it a practical field repair for contractors, property maintenance technicians, and experienced DIYers working on exterior door assemblies. The vinyl construction is flexible enough to conform to minor floor irregularities while maintaining consistent contact with the door bottom.

This threshold insert is intended for use in adjustable Macklanburg Duncan threshold bodies only. It is a direct drop-in replacement for the original vinyl insert in those assemblies, making it well suited for residential exterior door maintenance and light commercial applications where the original threshold frame is intact but the insert has cracked, compressed, or degraded over time. Sold in a package of 12 inserts, this SKU is appropriate for service contractors managing multiple units or building maintenance programs.

Key Features

• 1.25 x 36 inch profile fits adjustable Macklanburg Duncan threshold tracks
• Gray vinyl construction is flexible and weather-resistant
• Drop-in replacement design requires no threshold body removal
• Package quantity of 12 supports multi-door or multi-unit service calls
• Restores draft and moisture seal at the door bottom without full threshold replacement

Compatibility

Designed as a replacement vinyl insert for Macklanburg Duncan adjustable threshold models only. Not compatible with non-adjustable or fixed threshold assemblies.

Installation Notes

Installation is typically performed by a general contractor, handyman, or experienced maintenance technician. Before servicing, ensure the door is closed and secured. Remove the existing insert by sliding or prying it out of the threshold channel, then press or slide the new RV46H insert into place along the full length of the track. Verify the door closes with consistent contact along the insert before returning the threshold adjustment screws to the original position.