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PUSH TYPE FITTING CONNECTIONS
The Hobart RO-150 utilizes quick disconnect push fittings for the majority of connections. Quick disconnect push
fittings demand smooth, round, nick-free tubing and straight edges to form leak-free connections. Use either a
PVC pipe cutter, razor blade tubing cutter or sharp razor knife to ensure straight, clean cuts. Leaks at connections
are usually the result of deformed tubing. To correct a leak, release the water pressure, disconnect the tubing, cut
1/4" off the end of the tubing and reconnect.
Any tubing that is removed from the fitting frequently will eventually develop nicks or scratches that may lead to
leaks. In such cases, periodically trim the tubing as described above.
NOTE: Always release the water pressure before attempting to disconnect the tubing from the fitting.
To connect tubing, push tubing squarely into the opening as far as it will go. To release the tubing, push in on the
collette and pull out on the tubing.
WATER SUPPLY CONNECTION
TUBING / FITTING REQUIREMENTS
Due to the aggressive nature of high-purity RO product water, all tubing and fittings feeding the storage tank
and equipment should be plastic. Although the Post Neutralizing Filter corrects pH and the aggressive
tendencies of RO water, steps should be taken in avoiding the use of metallic connections and piping.
1. Ensure inlet water pressure is a minimum of 20
psi.
NOTE: Use the minimum amount of tubing to
connect the water supply to the system to cut down
on pressure drop.
NOTE: Inlet supply line should not exceed 20 feet in
length. Do not use a self-piercing saddle valve to tap
into the main feed water line.
NOTE: If using a brass compression fitting to
connect the plastic tubing, discard the brass ferrule
and use a plastic ferrule in its place. Use of a plastic
insert (stiffener) will increase strength of connection.
2. Run 3/8" poly tubing from the water supply to
the inlet connection tee on the left side of the
RO filter system located under the system
bracket and behind the sediment filter.
STORAGE TANK CONNECTION
NOTE: A 20 gallon storage tank pre-charged with air
between 12-15 psi is supplied with the Hobart RO-
150. This allows for a total draw down of
approximately 13 gallons RO water for on demand
use. If a larger draw down is required, larger storage
tanks are available upon request.
NOTE: A small air pump, such as that used for balls
or a bicycle tire, will work to charge the storage tank.
1. Verify the air pressure pre-charge of the empty
tank is within 12-15 psi.
A. Purge or add air as needed.