Wind-Driven Ventilator for Vent Stack

In certain wind conditions the drainage system has been getting pressurised slightly via the vent stack for the Biorock sewage treatment plant’s primary tank and lifting the Air Admittance Valves inside the house. The fix for this is to fit a wind-driven rotating ventilator cowl to the vent stack, which ensures that the drainage system stays under negative pressure whatever the wind direction.

Rotating cowl
Replacement rotating cowl

More info in an update at the end of the Post for the Biorock unit.

CC BY-SA 4.0 Wind-Driven Ventilator for Vent Stack by Marsh Flatts Farm Self Build Diary is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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