The Vacu-Stack® chimney cap installs quickly, easily, and securely. Follow applicable state code requirements relative to spark arresters.

Instructions for installing Vacu-Stack® Model VSS on round flues other than air-cooled

STEP 1: FIT INSIDE FLUE.

Vacu-Stack® chimney caps fit inside round metal and masonry flues. Press pipe end of Vacu-Stack® into flue until fit is snug.

STEP 2: APPLY WATERTIGHT SEAL.

Apply thin film of silicone caulking (not furnished, but readily available at local hardware store or home center) to seal joint between Vacu-Stack® and top of chimney.

Instructions for installing Vacu-Stack® model VSS-TDW on round air-cooled flues

FOLLOW STEPS 1 AND 2 ABOVE;
DO NOT BEND OR ADJUST SPACERS

Underside of cap showing three spacers. Do not bend or adjust these spacers.

The three spacers located on the underside of TDW models maintain ventilation space between bottom of Vacu-Stack® and top of chimney. This is essential for uninterrupted air flow through cooling channels in air cooled chimneys.

USE ADAPTER FOR SQUARE/RECTANGULAR CHIMNEYS.

An optional adapter is required for Vacu-Stack® installations on square and rectangular chimneys and must be purchased separately. Then follow Steps 1 and 2 above. See adapter installation instructions.