Trojan UVMax Model D4 ultraviolet (UV) water purifier

The Trojan UVMax Model D4 offers the same level of sterilization as the Model C4, however, it has several additional features including a elapsed time meter and lamp replacement reminder. However, the most important difference between the Model C4 and D4 is that the Model D has two important capabilities that the Model C4 does not: a UV intensity monitor, and the ability to add an optional solenoid kit. Similar to the Model C4, the Model D4 is appropriate for most residential applications where flow rates will generally not exceed about 7.5 gallons per minute. The Trojan UVMax D4 replaced the previous generation Model D in late 2008.

First, the Model D4 can be equiped with an optional UV intensity monitor. The UV intensity monitor continuously monitors the intensity of the UV light to ensure that the water is receiving an adequate dose of UV light to kill the bacteria, viruses, etc. The use of a model with a UV intensity monitor is generally recommended where a known e.coli or other serious problem is present or the feed water parameters may cause problems with UV tramsmittance from time to time (sediment flushing, iron or hard water scale build-up on the UV sleeve etc.). The UV intensity monitor MUST be purchased at the same time as the unit - it CANNOT be added at a later date. When equiped with the UV intensity monitor, it is refered to as the Model D4+ (PLUS).

Second, the Trojan UVMax Model D4 can also be equiped with an optional solenoid emergency shut-off kit. For more information on the emergency shut-off kit, CLICK HERE.



* For most residential applications, we recommend a UV dose of at least 40,000 µWs/cm2. Flow rate recommendations are based on 85% UV transmittance (UVT) and after 9,000 hours of bulb operation.