Pallas (Sita) 403 AL 16w UV system 10 l/min with 1/2in male connection

Sita 403 AL: 16W UV Disinfection System (10 l/min)

The Sita 403 AL is part of SITA's AL domestic UV range, manufactured in Italy to ISO 9001 quality standards and WRAS approved. Like every Sita AL system, it uses a 304 stainless steel treatment chamber and disinfects water by exposing it to UV-C light as it passes through, inactivating bacteria and viruses without any chemicals or additives.

AL models run on a simple power supply with LED indicators: a green LED confirms the system is working, a red LED flags a fault. If you'd like a digital day-countdown display and an audible lamp-failure alarm instead, the AL2 version of this range adds that.

Specifications

Who it's for

• Single users, flats, or point-of-use applications needing compact UV disinfection
• Feeding into small reverse osmosis systems, coolers or water dispensers
• Sites wanting the simplest, no-frills Sita UV option

Why it matters

UV systems should be sized generously against your actual site flow rate — as a rule of thumb, the UV's rated flow should be at least 4 times your required or achievable flow, or you should restrict flow to no more than 38% of the system's maximum rating. We'd also recommend physical pre-filtration ahead of the UV rather than relying on the UV alone: a triple-filter setup (5 micron string wound, 1 micron polyspun, then a 0.45 micron absolute filter) is a common specification, with two absolute filters in parallel where higher flow is needed.