The buyer’s search intent for a 2 inch wall thimble is to find a durable, easy-to-install vent sleeve that fits indoor gas water heaters and related exhaust applications. This guide highlights five well-suited options, explains who they’re best for, and compares key features to help you decide. Whether you’re upgrading an existing system or installing a new vent, these picks prioritize corrosion resistance, adjustable thickness, and reliable fit for common 2.36-inch venting standards.
| Product | ||
|---|---|---|
| CAMPLUX 2.36” Stainless Steel Vent Wall Thimble | Horizontal, Adjustable | Indoor gas water heaters with vent pipe diameter under 2.36” |
| 2.36” Wall Thimble Stainless Steel Wall Thimble | Horizontal Exhaust | Indoor gas water heaters with stable long-term use |
| Vent Wall Thimble for 2.36″-3.15″ Vent Pipes | Telescoping, 304 Stainless Steel | Gas appliances and stoves with variable vent sizes |
| Stainless Steel Vent Wall Thimble (2.36 Inch) | Direct-Temp Insulated, Adjustable | Indoor installation for CA318/CA318W-LP style water heaters |
| Stainless Steel Wall Thimble for Pellet Stove | Dual-Wall Insulated, 2.36″ Fit | Tankless or pellet stove venting in indoor projects |
CAMPLUX 2.36” Stainless Steel Vent Wall Thimble
Best for: Indoor water heater setups requiring a horizontal thimble with corrosion resistance and adjustable wall thickness. This model is designed to keep the outer wall cool while maintaining high flue gas temperatures for good draft performance. The flashing measures 9.85″ x 9.85″ and supports wall thickness from 4.7″ to 7.1″. It’s ideal for homes with metal or brick exterior walls and vent pipes under 2.36″ in diameter. A potential limitation is an emphasis on horizontal installation, so verify wall orientation before purchasing.
2.36” Wall Thimble Stainless Steel Wall Thimble
Best for: Horizontal exhaust systems in indoor water heater installations, offering solid stainless steel construction with an inner diameter of 2.36 inches. It supports long-term stable use and is particularly compatible with Camplux CA318 family models (CA318, CA318W-LP, CA318-NG). Choose this if you need a reliable, dedicated match for Camplux configurations, but note it does not list compatibility with CA422 models.
Vent Wall Thimble for 2.36″-3.15″ Vent Pipes
Best for: Those upgrading or installing vent sleeves for a range of vent pipe sizes from 2.36″ to 3.15″ with a 304 stainless steel build. Its telescoping length from 4.7″ to 9.1″ fits multiple wall thicknesses and wall types, including wood, brick, and insulated walls. This option is a good choice when you need flexibility, but ensure the chosen model matches your heater’s vent diameter and wall structure to avoid compatibility issues.
Stainless Steel Vent Wall Thimble – 2.36 Inch, 304 Stainless
Best for: Indoor installations that require a direct-temp insulated wall thimble with a 2.36-inch inner diameter. It supports models like CA318 and CA318W-LP and emphasizes easy installation with a 9.85″ x 9.85″ flashing and adjustable thickness from 4.3″ to 7.9″. Not suitable for CA422 models, so verify your water heater model before ordering.
Stainless Steel Wall Thimble for Pellet Stove
Best for: Dual-wall insulated 2.36″ vent piping in pellet stove and indoor heating projects. It offers a fireproof design with corrosion resistance and compatibility with common tankless water heater models like CA318/CA318W-LP/CA318-NG. The note to verify model helps prevent mismatches with CA422 units. Consider this option if you require robust insulation and a snug fit for compact indoor installations.
Buying Guide
Key considerations when choosing a 2 inch wall thimble include material, thickness adjustability, wall compatibility, and vent diameter match. Stainless steel with corrosion resistance is preferred for longevity and safe venting. Look for adjustable thickness ranges that cover typical wall depths and flashing surfaces that seal against moisture and drafts.
How to choose by installation scenario:
– Horizontal vs. vertical: If your exhaust runs horizontally through an exterior wall, prioritize models described as horizontal exhaust or with stable inner connections.
– Wall material: Select a model that lists compatibility with wood, brick, or insulated walls if your home has mixed materials.
– Heater compatibility: Confirm your water heater or stove model matches the thimble’s recommended compatibility to avoid fit issues.
– Size match: Ensure the inner diameter is 2.36 inches and the overall length accommodates your wall thickness while closing gaps to prevent back drafts.
Quick comparison at a glance
- Best overall durability: CAMPLUX 2.36” – corrosion-resistant stainless steel, adjustable thickness.
- Best for Camplux systems: 2.36” Wall Thimble Stainless Steel – proven fit for CA318 family models.
- Most flexible length: Vent Wall Thimble for 2.36″-3.15″ – telescoping design covers multiple wall thicknesses.
- Best insulated option: Stainless Steel Vent Wall Thimble – direct-temp insulated, 4.3 to 7.9″ adjustment.
- Best for pellet stoves: Pellet stove thimble – dual-wall insulated build for wood/pellet exhausts.
FAQ
- What is a wall thimble? A wall thimble is a sleeve that passes through an exterior wall to vent exhaust safely while protecting surrounding materials from heat.
- What diameter is common for these thimbles? The typical inner diameter is 2.36 inches, with some models supporting up to 3.15 inches externally.
- Can I use a thimble for both water heaters and stoves? Many models are designed for multiple gas appliances, but always verify compatibility with your specific model.
- Do these thimbles require professional installation? Installation is straightforward for those comfortable with venting work; for safety, have a professional inspect vent terminations and flashing.
- Are there any fire safety considerations? Yes, select a thimble with fireproof and insulation features to minimize heat transfer and protect surrounding walls.
- Will these fit any wall type? Most options accommodate wood, brick, or insulated walls; confirm wall thickness and flashing size before ordering.