Exhaust Rain Cap Installation

Vertical stacks require rain caps which impose little back pressure and can be forced open by exhaust.

Exhaust rain cap installation.

If you put a rain cap on or install some type of rain diverter on the dicharge you will. Semi circular flaps butterfly damper cover the exhaust stack when fan is off. Available in most sizes. Ensure that the exhaust piping is not in contact with the inner wall of the thimble.

Ensure that enough exhaust piping is installed to be able to install the rain cap and clamp. 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. Use hi temperature rated sealant mil a 46106b 100 series rtv to install a bead of. Periods of heavy rainfall may be accompanied by high winds that deflect raindrops under the cap and into the stack changnon 1966.

Cause the exhaust gas to be blown down towards the home. Horizontal pipe outlets should be oriented away from prevailing winds and cut at 30 to 45 angles to reduce gas turbulence and resulting noise. Ensure that the exhaust pipe does not interfere with the rain cap closure. When fan is on flaps are forced out of the way to provide a clear path for air movement.

Level and secure the cap. Ensure that the exhaust piping is not in contact with the inner wall of the thimble. Slide the new cap into the flue. If the stub section on the cap is too large crimp it with a crimping tool.

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. If this happens you will not be able to recognize it. Made from galvanized spiral pipe for strength and durability. Stack caps that deflect the exhaust jet have a detrimental effect on exhaust plume rise.

Older rain caps for metal chimneys and flue liners can deteriorate or fall apart but installing a replacement cap is as easy as climbing onto the roof. 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. This will increase the potential for the exhausted gas to re enter the home.

Orient the rain cap such that the counter balance is facing against the. Skip navigation sign in. Small conical stack caps often do not completely exclude rain because rain does not always fall straight down. 1949 farmall super a rain cap modification and installation and test jan kotze.

The built in gutter system is designed to prevent rain and snow from entering the stack.