See also:

• Recreation: Outdoors: Equipment: Water Purifiers  (0)
• Shopping: Home and Garden: Kitchen and Dining: Water Treatment  (110)

Aerobic Oxygen - Makes and sells an additive for purifying water..

Arctic - Sells British Berkefeld and Doulton water filters and cartridges..

James Filter - Carries British Berkefeld and Doulton water filters and cartridges..

Katadyn - Sells water purification filters. Also includes online versions of the original instructions..