Typical winter decommission and maintenance tasks for rainwater harvesting

Typical winter decommission and maintenance tasks for rainwater harvesting

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Component	Typical decommissioning and winter maintenance tasks needed prior to spring startup 1
Source Area/Collection Surface	Clean residual de-icing material (sand, salt) from pavement prior to spring startup
Collection System	Drain and disconnect conveyances to prevent freeze/thaw damage
Storage System	Drain all water from above-ground outdoor storage tanks Disconnect downspouts and/or pipe upstream of the tank to prevent rainwater/snowmelt from entering the tank during winter months Disconnect electrical supply that controls equipment Shut off makeup water supply to prevent water from entering the tank
Treatment System	Drain and disconnect any pre-storage treatment devices that should be decommissioned during the winter Decommission treatment system components per manufacturer’s guidelines
Distribution System	Switch end use supply from harvested water to public water supply (if necessary) Drain all water from pumps and conveyance to prevent freeze/thaw damage Disconnect electrical supply to the pump and control equipment Complete all recommended winter maintenance for pumps and controls
Overflow/Bypass Systems	Drain and disconnect to prevent freeze/thaw damage