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Free shipping on qualified orders over $599! Excluding HI & AK, and products requiring special shipping arrangements.

3" Wall Thimble Sleeve Extension

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Original price $22.71 - Original price $22.71
Original price
$22.71
$22.71 - $22.71
Current price $22.71

Use to add 6” of length to Wall Pass Through and Wall Thimble for thicker walls.

SKU 300839
Brand FasNSeal
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Product Info


FasNSeal is for use with natural gas or propane Categories II, III and IV appliances or Canada’s Type BH Gas Vent Systems, having a maximum rated operating temperature of 480°F and a maximum positive pressure of 15″ (FasNSeal Flex 6″) water column. FasNSeal can be used on a wide range of applications, including: high efficiency gas boilers, furnaces, booster heaters, pool heaters, water heaters, unit heaters, or tankless water heaters.

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