Sterling SGM-250A User Manual

Fill the water tank with water by opening valves e and f. Valves 
c, d, g, and h are automatically controlled by a timer. After you 
open valves e and f, water flows and is filtered in the normal 
direction. 

 

Take a moment now, while the filter is clean, to record pressure 
gauge readings at the inlet and outlet of the filter. You’ll use these 
readings later to determine the cleanliness of the filter media. 

 

Complete the installation of the sand and gravel filter by plugging 
the unit into a 110-volt source of electricity. The sand and gravel 
filter is now ready to use. 
 
 

Place the unit on a suitable and level foundation, preferably a 
concrete floor or pad and near the pump for best operation. The 
location you select must also have an open drain to a sewer for 
purging and a 110-volt electrical source. 

 

Use a fork lift truck when moving the unit to avoid damage. 

Be sure that piping to the unit has a bypass circuit. The bypass 
circuit allows for removal of the unit for servicing without 
interrupting water service. Part of your Centri-Separator system 
includes a three foot (about 1 m) suction leg, including a priming 
valve/connection for startup. Connect the pump suction leg to the 
pump suction connection. Sterling/Sterlco recommends that you 
use a hose at least 1½” (about 38 mm) in diameter for clean water 
flow to the pump tank. Your system includes a threaded barbed 
fitting and clamps to install the hose. 
 

Be sure that the pump on your Centri-Separator system is primed 
before you start up the system. To do this, connect a city water line 
to the priming valve. Allow enough time for the suction leg to fill 
with water, then close the priming valve.