Crystal Pool (PVT) Ltd. Sangabo Mawatha, Anuradhapura 0716552500 crystalpool.lk Sand filters are cleaned by backwashing, which involves reversing the water move throughout the filter, and flushing the filthy water into a waste line. To accomplish this, They could must make use of a backhoe along with other weighty equipment. https://maps.google.com/maps?ll=8.310069,80.40174&z=16&t=m&hl=en&gl=LK&mapclient=embed&cid=3232803549851328223
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