Residential-use water softeners shall be sized in accordance with Table 611.4.
For SI units: 1 inch = 25 mm.
|REQUIRED SIZE OF
|NUMBER OF BATHROOM
|3/4||up to 22|
|1||up to 43|
- 1 Installation of a kitchen sink and dishwasher, laundry tray, and automatic clothes washer permitted without additional size increase.
- 2 An additional water closet and lavatory permitted.
- 3 Over four bathroom groups, the softener size shall be engineered for the specific installation.
- 4 See also Appendix A, Recommended Rules for Sizing the Water Supply System, and Appendix C, Alternate Plumbing Systems, for alternate methods of sizing water supply systems.