Monday, 7 April 2014

How does PopUp filter works?

PopUp Filter for Roof top Rainwater Harvesting:

·         PopUp filter must be installed vertical only.
·         PopUp filter of 110mm can handle rainwater from a maximum 1000 sq. ft. of roof area (1000mm annual rainfall)
·         Keep the PopUp filter dry during non rainy days by opening the flush valve to release stagnant water.

How PopUp filter works?
The “PopUp Filter” has three components (rainwater receptor, flush valve and filter element). Rainwater receptor is where the rainwater is allowed to flow from down pipes in to the filter and a flush valve is provided to flush the first flow of the rainwater along with leaves, dust etc.  Water received in the receptor flows upwards against gravity through a filter element to filter most of the floating elements and allow water to stabilize in this filtration zone.  Rainwater passing through this filter element is relatively cleaner and flows out through an outlet, which can be led to storage device. 
Filter element is mounted on a vertical stabilizer barrel with a friction fit. Filter element need to be cleaned periodically during the rainy season to remove the impurities trapped and there by keep the filtration system clean.  In the event filter is not cleaned and the filter element is getting clogged, “PopUp Filter” has a safety feature built into it.  The water pressure pushes out the clogged filter element from the stabilizer barrel and allows the water to flow out freely.  This safety feature will avoid flooding of the rooftop because of clogged filter.  The first indication of the filter getting clogged is rainwater flowing out of a vent hole provided on the top of the filter element.

PopUp Filter Maintenance:

Flush the first rainwater by opening the flush valve on the filter for few minutes, close the flush valve after all the dirt on the roof is flushed. When the rain stops, flush the filter and remove the filter cartridge gently from its place and wash it thoroughly under a running tap by gently tapping the filter element with a stick on all sides. 

The dirt sticking in the filter element gets released and washes off.  Replace the clean filter element back to its place by gently inserting it in the barrel.  Take care not to press it too hard at the end.  If pressed too hard, filter element gets locked inside the barrel and may require greater force to retrieve it back when required for cleaning and also may not PopUp when the filter is clogged or chocked.  Allow the filtered water to get stored in tank for future use.

Here is a video where Mr. A R Shivakumar himself explained how ‘PopUp filter’ works