Haws 2500.FS User Manual
Page 5

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Model 2500.FS
Page 5 of 12
Step 4:
Attach the inlet tubing from 
the cooler, found inside the 
unit, to the filter head outlet 
(ports are labeled), and 
attach the outlet tubing of 
the pressure regulator into 
the filter head inlet. The 
regulator itself may be 
inside or outside the unit. 
Press the filter assembly 
into the mounting clip until 
it snaps into place. 
NOTE: The regulator 
protects against sudden 
pressure increases in the 
supply line. 
 
Step 5: 
Provide a water supply inlet 
of 1/4" tubing with a code-
compliant shutoff valve. If 
the optional Model 2518 
1/4" leak-detecting valve 
was purchased, install it in 
the inlet plumbing as well. 
This valve is designed to 
shut off the water supply if 
water contacts it, so it is 
best to secure it firmly to 
the floor, very close to the 
unit itself (NOTE: Take 
care not to introduce water 
to this valve by mopping, 
etc.). Connect the 
assembled water supply 
plumbing to the inlet of the 
pressure regulator. 
NOTE: The optional 
Model 2520 cooler base 
has mounting geometry to 
allow the leak-detecting 
valve to be mounted 
directly upon it. 
 
 
Step 6: 
Any new filter cartridge must be purged of bubbles and carbon particles (both of which are 
normal in a new filter) before it can be used. Do not purge the filter through the cooler; do 
this instead: 
 
Disconnect the tubing at the filter outlet and install a separate length of tubing (by others) into 
the outlet (see note 5 on page 3). Direct this tubing into a suitable container or drain, and 
turn on the water supply to purge 5 gallons water through the filter and into the container. 
Turn off the water and re-install the original filter plumbing when done. 
This step is necessary for replacement filters as well. 
 
Step 7: 
Turn on the inlet water supply to fill the system. Check the inlet tubing and the unit for leaks. 
Reinstall the cup dispenser. 
 
Step 8: 
Make sure that the hot water tank power switch on the back of the unit (see diagram on 
next page) 
is in the “Off” position. Plug the unit into 115VAC wall power.
