Grey water filter tank recovery system and filter backwashing system
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United States of America Patent
Stats
-
Jun 2, 1998
Grant Date -
N/A
app pub date -
Sep 26, 1996
filing date -
Sep 26, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A grey water recovery system comprises a filter tank having a filter medium therein. Grey water is delivered to the filter tank by a delivery conduit and filtered grey water is collected in a sump which surrounds the filter tank. A pump removes the filtrate to a distribution system for irrigation and similar use. The recovery system includes a backwash system. The backwash system has a flow responsive poppet valve which permits clean backwashing water and pressurized air to flow upwardly through the filter medium while closing the normal filtrate flow path to the sump.
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