Exhaust Rain Cap Installation

Semi circular flaps butterfly damper cover the exhaust stack when fan is off.

Exhaust rain cap installation.

Vertical stacks require rain caps which impose little back pressure and can be forced open by exhaust. Ensure that the exhaust pipe does not interfere with the rain cap closure. Small conical stack caps often do not completely exclude rain because rain does not always fall straight down. Available in most sizes.

If you put a rain cap on or install some type of rain diverter on the dicharge you will. Level and secure the cap. If the stub section on the cap is too large crimp it with a crimping tool. Ensure that enough exhaust piping is installed to be able to install the rain cap and clamp.

Slide the new cap into the flue. Orient the rain cap such that the counter balance is facing against the. Use hi temperature rated sealant mil a 46106b 100 series rtv to install a bead of sealant at the gap around the perimeter of the thimble body and the. The built in gutter system is designed to prevent rain and snow from entering the stack.

Place the rain cap over the exhaust pipe so that the top edge of the exhaust piping is a maximum of 25 from the top edge of the rain cap clamp. Use hi temperature rated sealant mil a 46106b 100 series rtv to install a bead of. Ensure that enough exhaust piping is installed to be able to install the rain cap and clamp. Ensure that the exhaust piping is not in contact with the inner wall of the thimble.

If this happens you will not be able to recognize it. Periods of heavy rainfall may be accompanied by high winds that deflect raindrops under the cap and into the stack changnon 1966. A hinged flapper damper is opened by the exhaust flow from the stack and closes when the exhaust flow stops care must be taken to ensure continued proper operation. Horizontal pipe outlets should be oriented away from prevailing winds and cut at 30 to 45 angles to reduce gas turbulence and resulting noise.

This will increase the potential for the exhausted gas to re enter the home. Cause the exhaust gas to be blown down towards the home. Skip navigation sign in. 1949 farmall super a rain cap modification and installation and test jan kotze.

The flapper damper on this type of cap may corrode allowing the flapper damper to stick open or closed. Stack caps that deflect the exhaust jet have a detrimental effect on exhaust plume rise. This video is about modify a too small rain cap to fit my farmall super a exhaust. Both horizontal and vertical exhaust stacks should extend above or away from the building.

Ensure that the exhaust piping is not in contact with the inner wall of the thimble.