Here's some info for you:
http://www.poolandspastuff.com/GridHelClearflow.htm
http://www.pentairpool.com/pool-pro/...ilters-232.htm
Here's some info for you:
http://www.poolandspastuff.com/GridHelClearflow.htm
http://www.pentairpool.com/pool-pro/...ilters-232.htm
PoolDoc / Ben
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