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System Sizing
All UV systems are rated for a specic ow rate in water that meets the quality parameters on
page 5. PLEASE NOTE that increasing the ow above this rang or disinfecng water that does
not meet the quality parameters will decrease the dose and therefore compromise the micro-
organism inacvaon.
To determine ow rate follow these simple steps:
Be sure no water is being used in the home. Open a faucet or tap nearest the pressure system
and run unl the well pump starts. Close the faucet and using a second hand watch, record the
length of me in seconds unl the pump stops. This is known as the cycle me.
Then using a container of known volume, preferably in US Gallons, open the faucet or tap near-
est the pressure system and measure the amount of water drawn o unl the pump starts again.
Depending on the size of the container used, it is acceptable to turn the faucet on and o to
empty the container. This measurement is known as the draw down.
To calculate the pressure system ow rate divide the draw down by the cycle me and mulply
that by 60.
Draw Down__________÷ Cycle Time____________ x 60=__________Pumping Rate in USGPM
Locaon
For Point of Entry (POE) systems, choose a locaon where the main cold water line is accessible.
The system must be installed aer other water treatment equipment (soener or lters), but
before any branches (See Figure 1). For Point of Use (POU) systems, install the unit just before
the faucet. SpringWell recommends that a 5 micron lter be installed before the UV system for
a nal polishing step before the water is disinfected.
Figure 1. Recommended POE Installaon Locaon
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