Stainless Steel Category 3 Wall Thimble Extension

Stainless Steel Category 3 Wall Thimble Extension (VN )

5.00 stars, based on 1 reviews
The wall thimble extension is used to add 6” of length to Wall Pass Through and Wall Thimble for thicker walls. What is UL 1738? In short, it is a US standard for gas venting systems required in category 3 applications. Category 3 refers to...
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Perfect unit for my garage heater install

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We installed a natural gas heater in our garage and needed the correct piece to go thru the wall for a horizontal exhaust application. This unit along with the extender tube (needed 11” for our wall) was perfect.
Reviews 1-1 of 1