Rainwell RFD
Operation - Rainwater Tank
The Rainwell RFD simply inserts into a downpipe with a single pipe connection to the rainwater tank's overflow outlet or new flange. The height of the Rainwell RFD's overflow outlet on the downpipe determines the rainwater tank's capacity.
Rainwater passes through the inlet filter to expel roof litter, filtered rainwater is then diverted to the rainwater tank. As the rainwater tank fills, the levelling effect of gravity raises the water level to the Rainwell RFD's overflow outlet, to divert the flow of rainwater back to the downpipe.
Self-cleaning Filtration
An inclined, contoured inlet filter allows rainwater and gravity to move roof litter down its surface and out the opening. Contours also break water surface tension and expand the size of filter area to ensure effective rainwater flow-through in heavy rainfall and roof litter conditions.
Mosquito Prevention
The self-cleaning inlet filter and outlet screen are made from mosquito-proof mesh. Mosquitoes cannot pass through the Rainwell RFD to the rainwater tank from both the downpipe and stormwater openings. Mosquitoes developed in storage water from eggs washed in from guttering are trapped in the system.
Mosquito Prevention System Comparison - PDF 73kb
Diversion system
The Rainwell RFD's diversion system operates the rainwater tank's inlet and overflow function at the downpipe. When the rainwater tank is at capacity, the diversion system changes the rainwater flow direction from the rainwater tank to the downpipe, which isolates the storage water and delivers filtered rainwater to our waterways.
Connecting multiple downpipes to the rainwater tank to increase roof catchment area is simplified. Positioning all Rainwell RFD's at the same level will retain the original flow through the downpipe to the existing stormwater system.
Multiple Rainwell RFD System - PDF 51kb
Maintenance
The Rainwell RFD is positioned on the downpipe just above the level of the rainwater tank's overflow outlet for safer access to the easy-lift-out inlet filter and overflow screen for occasional cleaning.
Rainwater Tank Disconnection
Disconnecting the rainwater tank is simply done by either, plugging the Rainwell RFD's connection flange or, removing the Rainwell RFD and replacing the section of downpipe.
