Including filter system and high-performance Calicivirus filter.
Calicivirus refers to a family of viruses that can enter drinking water when contamination from human waste occurs. Because these viruses are microscopic, water that looks clear in Littman can still be a concern. Homeowners often learn about viral risks from a utility notice, a private well test, or news of a nearby system issue; understanding how viruses behave and how they’re controlled is a good first step toward feeling confident about every tap in your home.
Viruses aren’t like visible sediment, rust, or a chlorine smell—you can’t see or taste them, and boiling isn’t a practical fix for protecting an entire house. Calicivirus can be introduced through compromised plumbing, backflow, flooding, or vulnerabilities in wells, and it can travel with the water that reaches your fixtures. A whole-house strategy treats water at the point it enters your Littman home so bathrooms, laundry and kitchen taps are all covered together rather than relying on single-tap solutions.
For calicivirus, the most effective single whole-house option is ultraviolet (UV) disinfection. UV systems don’t filter out particles like carbon systems do; they use a UV lamp inside a stainless steel chamber to inactivate microorganisms as water passes through. Properly sized and maintained UV units are widely used for virus control because they address contaminants that standard media can’t capture, and they provide continuous treatment without changing day-to-day water use in your Littman residence.
UV works best when water is clear enough for the light to penetrate, so a sediment prefilter is often installed ahead of the UV chamber, with the UV unit providing the core protection against calicivirus. Performance relies on correct flow rate, a clean quartz sleeve, and regular lamp changes since UV output falls over time. UV adds no chemicals or taste changes, making it a simple point-of-entry barrier, and Mr. Pure Water can help Littman homeowners select and size the right whole-house UV system for their water and usage.