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backwash |
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backwash
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Backwashed water may also be used for irrigation purposes, but Jeanette Smith, manager of standards at NPSI, advises checking with local health departments for any disposal restrictions. With pressure diatomite earth filters, for example, when backwashed, the operator might assume that when the sight glass is clear, the filter elements are clean. When saltwater pools are drained or when their filters are backwashed, they put a salty waste into the sewer system. |
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