Filtration
Filter basics:
Filtration is simply the mechanical process by which suspended solids are removed from water. The solids are
removed over a period of time as they pass through the filter and particles become trapped within the filter membrane or element.
The Pacific Micro-Clean System is such that the water turns over 2-4 times the turn over rate recommended by ANSI and the NSF and in addition the system will purge twice a day, creating turbulence for a few minutes which agitates the water and increases the over all effectiveness of the filtration.
According to ANSI American National Standard for portable Spas and the National Sanitation Foundation, the hot tub should be designed to turn over the entire spa water capacity at a minimum of once every hour. In other words, the entire contents of the hot tub must pass through the filters 24 times a day. This is all about safety, both for the consumer and for the equipment.
Spa cartridges are not paper, but are made with a special spun bonded, non-woven media. This material is
100 percent polyester fiber and does not contain any resins or binders, which could break down over time.
In addition, the fabric is rot and mildew resistant.
FYI:
The Pacific Micro-Clean System will create suction through the filter ranging from 20-30 gallons per minute leaving a very healthy margin for the filter. In regards to National Sanitation Foundation certification, the NSF allows a flow rate of 1 GPM for residential pools and .375 GPM on commercial installations. Unicel filters are rated at a maximum flow rate of 1 gallon/min. per square foot of filter. So a 50 Square foot Unicel filter has a maximum flow capacity of 50 GPM.
While cartridge filters can work at any flow rate, generally speaking, the lower the flow per square foot, the more efficient the system works given that there is enough agitation periodically to stir things up.
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