Conducts the 1st stage of the ALPS filtration system. Purifies water from rust, dust, sand, silt and bacteria such as cholera, typhoid and coliforms. (0.2 micron filtration). NSF APPROVED.
**Replace every 6 to 9 months.
Immerse/soak in water at least ten minutes, which rids the dome of any dust particles from the manufacturing process and primes it for use. Assemble ceramic dome via butterfly nut & washer, onto the smaller (top) container. Gently remove and gently clean the dome periodically with a soft toothbrush/fabric under running water, especially if/when residue forms on the dome surface.