Backwashing: Difference between revisions
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→When to Backwash
Matt Parnell (talk | contribs) (Created page with "Backwashing is the process of reversing water flow in a filter, flushing trapped particles and material (debris) to waste (sanitary sewer). == When to Backwash == Per PHTA g...") |
Matt Parnell (talk | contribs) |
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Per PHTA guidance, backwashing the sand filters is necessary when the gauge pressure increases 8 to 10 PSI above the starting pressure (typically about 9 to 10 PSI). | Per PHTA guidance, backwashing the sand filters is necessary when the gauge pressure increases 8 to 10 PSI above the starting pressure (typically about 9 to 10 PSI). | ||
In other words, when the tank gauge shows 17 to 20 PSI, backwashing is necessary. That said, depending on other parameters (such as flow rate), backwashing before this threshold may be necessary. To maintain proper filtration, the system must have sufficient flow to fully turn over every 6 hours (4 times daily). | |||
== Excessive Backwashing == | == Excessive Backwashing == | ||