Mineye 3.15'' Stainless Steel Vent Wall Thimble for Gas Tankless Water Heater, Double Wall Thimble Pipe Ventilation Design, Retractable Length from 4.7" to 7.8"

Features

• Durable & Long-Lasting: The wall thimble from premium stainless steel with a 3.15-inch inner diameter, this exhaust sleeve is engineered for strength and longevity. Providing solid support for your water heater exhaust system 
• Improve Ventilation Performance: Specifically designed for horizontal exhaust applications, this water heater exhaust pipe seamlessly integrates with indoor gas water heaters. It promotes efficient exhaust gas flow, prevents backflow, and safeguards indoor air quality and safety.
• Quality Material: The wall thimble for exhaust vent is made of stainless steel, which is not only corrosion-resistant but also has a polished surface. Effectively keep maintain the cooling of the chimney outer wall while ensuring high flue gas temperature
• Adjustable Length: Length can be adjusted from 4.7“ to 7.8” to accommodate thicker walls. Wall thimble flashing is 9.84“ x 9.84” with a tight internal connection.
• Perfect fit: Stainless steel wall mounted thimble used for through-the-wall chimney horizontal installations, making them an ideal choice for home heating and bathroom installations. Very suitable for wooden stoves, fireplaces, stoves, boilers, stoves, and gas water heaters