2.36" Stainless Steel Direct Vent Wall Thimble for Water Heater – Retractable (4.25"-7.87"), Fits Gas Tankless Heater Round Tube Ventilation – Tools & Hardware

High Quality and Durable: This direct vent wall thimble is made of high-quality stainless steel, which is durable and not easy to corrode. The surface is polished, which can keep the outer wall of the chimney cool while ensuring a high flue gas temperature for optimal ventilation performance Adjustable Length: The size of the wall thimble is about 9.85 x 9.85 inches, and the internal connection is tight. The thickness size can be adjusted to adapt to thicker walls. The adjustment size range is 4.25 in~7.87 in Applicable Models: The wall thimble is used for horizontal exhaust ventilation, only through the outer wall, suitable for Camplux tankless water heaters CA318, CA318W-LP, CA318-NG and other models, not suitable for CA422 water heaters Safe and Reliable Connection: Designed to meet high safety standards, it provides a stable and leak-proof connection for the ventilation pipe, enhancing safety and peace of mind. Note: This product is only suitable for horizontal horizontal installation, not vertical installation. Please make sure that your ventilation pipe diameter is less than 2.36 inches