Rinnai Water Heater Thimble

The Rinnai Wall Thimble, part number 224045, is a venting component designed for use with Rinnai indoor tankless water heaters. This thimble provides a protective passage for the vent pipe as it passes through a wall, helping maintain proper clearances and safe installation.

The wall thimble is part of Rinnai’s concentric venting system, which combines intake air and exhaust venting into a single assembly. It helps protect surrounding wall materials from heat exposure while supporting proper vent alignment and system performance.

What’s Included: One wall thimble for use with compatible Rinnai venting systems.

Installation Limits: Intended for installation in exterior or interior wall penetrations where venting passes through combustible construction.

Compatibility: Compatible with most indoor Rinnai tankless water heaters using concentric venting systems, except models requiring separate intake and exhaust venting.

• OEM Rinnai wall thimble venting component
• Part number 224045 for accurate replacement identification
• Protects wall structure where vent pipe passes through
• Designed for concentric intake and exhaust vent systems
• Supports proper vent alignment and safe installation
• Fits standard wall construction such as 2x4 or 2x6 framing
• Compatible with most indoor Rinnai tankless water heaters

This wall thimble ensures safe vent routing through wall structures by maintaining proper clearance between the vent pipe and surrounding materials. It is an essential component for compliant vent installation and long-term system safety.