PWMEM Residential

50 Gallons Per Day Membrane Replacement

  • For One-Piece Manifold Reverse Osmosis System and ZRO-4 ZeroWaste Reverse Osmosis System
  • Advanced thin film composite membrane
  • Flow rate: Up to 50 gallons per day
  • Long lasting – replace after two to five years

Approval/Certification Information

For product-specific approval information, please refer to the product’s specification sheet (see literature section above) or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:


ASSE CSA FM Approvals NSF
UL ULC USC WQA