This Alpine AH903663 27-47 in. Telescopic Roof Jack, 2.5/12 Pitch has some cosmetic damage incurred during shipping. Upper roof jack crown is bent. Slant deck is also bent in several places. For detailed photos please click 'See Additional Images' above. This Alpine AH903663 27-47 in. Telescopic Roof Jack, 2.5/12 Pitch meets the full manufacturer's specifications, comes with the full manufacturer's warranty, and includes Alpine's premium guarantee.

For product specs and photographs of product in its original condition, click here.

27-47 in. Telescopic Roof Jack, 2.5/12 Pitch.

The flange can flex from 1/12-4/12 pitch.

This roof jack is essential for venting an 80% efficient mobile home gas furnace. To ensure a proper fit, measure the distance from the base of the furnace to the roof flange, then subtract the furnace's height from that measurement. Choose a roof jack that can telescope within this range for a precise fit. For adjusting the roof pitch, check the accessories for the suitable roof wedge.