4RP3 Series 4 in x 36 in Aluminum Round Pipe Gas

SPECIAL ORDER ITEM. Review Returns Policy before purchase. The Hart & Cooley RWT Series wall thimble provides a safe pass-through for vent pipe installations through combustible walls in gas vent systems. Designed to maintain proper clearance between the vent and surrounding building materials, it helps support safe and code-compliant venting. The adjustable sleeve fits a range of wall thicknesses, allowing flexible installation in residential heating applications. Constructed from durable steel, the thimble provides reliable structural support and protection for vent pipes as part of a complete Type B gas vent system.