I'm sorry...I want to make the point about matched sets of pumps and filters, again. Looking for a response and some clarification. For example...
Line 58 of the Pump Database I was provided earlier says that the Hayward Matrix 2-Speed 1.5 HP Pump (SP15922S AG) requires a sand filter with a Effective Filtration Area of 4.4276 sq-ft at 53.04 GPM.
Hayward sells that pump in combination (S230T932S) with a 23" Filter (S230T). That sand filter has an Effective Filtration Area of 2.7 sq-ft at 54 GPM.
Isn't the 23" filter (S230T) with an Effective Filtration Area of 2.7 sq-ft, provided in the combination pump/filter setup from Hayward, undersized for the 1.5 HP 2-Speed Pump (SP15922S) it's paired with by NSF Standards? NSF recommends a Sand Filter with a 4.4276 sq-ft Effective Filtration Area.
I hope I'm not beating a dead horse. But either the NSF standards for sand filters are unnecessarily high or the equipment companies are selling combination set ups with either undersized filters or oversized pumps. Both those scenarios are detrimental to effective pool maintenance. All the equipment companies seem to do the same thing. A filter with smaller Effective Filtration Area than what is recommended by NSF Standards.
I realize there may be other factors to consider ( distance of equipment from pool, changes in elevation and pool size) but I can't see those factors making such a large difference in variation in the sizing of pump and filter between the NSF Standards and Manufacturers combinations.
Or, am I not understanding the spreadsheets provided here or the spec sheets provided by the manufacturer?
I can't thank you guys enough for taking the time and sharing your expertise with us when considering our questions.