Watts R4X40-3 - Manual (Page 15)

VI. APPENDIX
The following tables are intended as a guide to determining the flow rates for the R4X40
series RO systems. All flows are in gallons per minute (GPM) with 77°F feed water.
Nominal flows for systems operating at 50% recovery with a feed water SDI < 1.
R4X40-1 R4X40-2 R4X40-3
Product GPM 1.5 3.0 4.5
Reject GPM 1.5 3.0 4.5
Nominal flows for systems operating at 50% recovery with a feed water SDI < 3.
R4X40-1 R4X40-2 R4X40-3
Product GPM 1.25 2.5 3.75
Reject GPM 1.25 2.5 3.75
Nominal flows for systems operating at 50% recovery with a feed water SDI 3 to < 5.
R4X40-1 R4X40-2 R4X40-3
Product GPM 1 2 3
Reject GPM 1 2 3