14W USA UV LAMP/QUARTZ SLEEVE X 1SET
10-14W BALLAST X 1PC, IN/OUT: 1/4″
Is UV necessary for a water filter?
UV purification is not necessary for a water filter, but a water filter is necessary prior to a UV system. UV systems are most effective when water is clear, so they must have at least a five-micron pre-filter to prevent living organisms from hiding behind loose particles. You could use a sediment filter to remove dirt and debris from a well water supply or a water softener to reduce iron as prefiltration. A UV purifier is the last thing water passes through on the way to the house.
Test your water quality before you use a UV system to make sure the water does not exceed these levels:
- Hardness < 7 gpg (grains per gallon)
- Iron < 0.3 ppm (parts per million)
- Manganese < 0.05 ppm
- Turbidity < 1 NTU (nephelometric turbidity units)
- UVT < 75%
- Tannins < 0.1 ppm