The USWF-4C101 Contractor Series UV disinfection system is a reliable, economical, and chemical-free way to control microbiological contaminants including E.coli, Cryptosporidium and Giardia lamblia in residential and light commercial applications up to 10 GPM. Designed with ease of operation in mind, the bayonet style UV lamp connector allows for quick lamp changes without tools, and the quartz sleeve can be changed or removed for cleaning without the need to drain the UV chamber. This UV system utilizes a low pressure, high output UV lamp rated for 10,000 hours of continuous output, housed in a commercial grade axial flow UV chamber made from 316L grade stainless steel which offers better durability and corrosion resistance compared to the 304 grade stainless steel chambers used by many other brands. The controllers for the USWF Contractor Series provide both visual and audio lamp out indicators in a splash-proof case. The ballast in the controller is also fully potted to further protect against possible water damage and to improve heat dissipation. By purchasing a USWF-4C101 you're not only getting a high quality UV disinfection system, but also peace of mind that the water in your home will have an extra level of protection.