The 3M Model A1 Replacement Cartridge is designed for use in 3M Recreational Vehicle / Marine Filtration Systems US-A1, WV-B2 and US-B1. Part number 5610429.
Model A-1 Specifications:
- Reduces >95% of Chlorine
- Reduces Sediment, Dirt, Rust, Sand, and Silt down to 1 micron
- Patented Carbon Block for Improved Absorption
- 1.5 GPM Flow Rate
- 2000 Gallon Filter Capacity
The A1 should be changed every 6-8 months or 2000 gallons depending on water quality and usage.