Download our technical statement detailing the Simple Index Approach with the Up-Flo™ Filter and the Downstream Defender® Select.

The Simple Index Approach, outlined in CIRIA C753 The SuDS Manual, is a water quality design method for sites with a low to medium risk pollution hazard level.

Download our technical statement to find out the SIA pollution mitigation indices for the Up-Flo™ Filter and the Downstream Defender® Select.