Disinfection
Systems
Questions & Answers
part 3 - Does my water require pretreatment before my UV?
Question: Does my water require pretreatment before my UV?
Answer: Yes, you must have your water tested prior to installing a UV systems. Many people feel that if they can fill a glass with water and the water looks clear then that must mean that it is.
This is not true. There is more to water than what the naked eye can see. Water flowing through a UV system needs to be free from hardness, iron, turbidity, manganese and color (which can be called tannins).
If these levels are high, scaling can occur, causing a decrease in the UV system's efficiency as well as an alarm condition if the system is monitored.
We always recommend to our customers that they install a 5 micron filter prior to the UV in order to knock down any turbidity that may be present in the water.
We do recommend that if you are drawing from a lake or from some other SURFACE water supply (lakes, rivers, dug well etc.) that a water analysis is ALWAYS done prior to the installation of a UV.
Question: How do I disinfect water lines in my home?
Answer: A UV system is there to protect your water from pathogenic microorganisms, BUT there is the potential for harmful microorganisms to already be present in the water lines. The water lines then need to be disinfected upon installation of the UV system.
A simple way to introduce a disinfectant (chlorine) into the lines is via the filter. Once the Sterilight system has been plumbed in simply remove the cartridge from the filter housing and fill the housing halfway with household bleach (bleach contains 5.25% chlorine).
With the Sterilight system ON, turn the water on and ensure that at each and every tap a chlorine smell is detected. Leave the bleach in the lines for at least one hour. Drain the chlorine from the lines.
Question: What is a solenoid valve and can I hook one up to a UV System?
Answer: A solenoid valve is an electrically-activated mechanical valve that opens and closes when power is applied to it. This kind of valve can be installed and wired into a Sterilight system which is monitored.
If the UV intensity were to drop below the recommended level the solenoid would then be activated and automatically shut down the flow of water. This will keep contaminated water from getting through the UV system.
A solenoid can be hooked up to a Sterilight system either by dry contacts (the Platinum, SUV and SUVAM systems all come equipped with dry contacts), or directly into the Sterilight system (Silver and GOLD series can be hooked up directly to a solenoid; outside power does NOT need to be brought to the solenoid).
Question: Where do I install UV in relation to other treatment equipment?
Answer: The UV must be the very LAST piece of water treatment equipment.
http://www.watertreatmentguide.com/ultraviolet_systems.htm
Click here for Part 1- Utraviolet Disinfection Systems
What is UV light?
Click here for Part 2 - Utraviolet Disinfection Systems
Will a UV system kill all microorganisms in my water?
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