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Leaks between bottom of housing and cap

1.

 Ensure sump is tightly screwed to cap. If it still leaks close

the cold water supply and tank valves.

2.

 Clean black rubber O-ring and lubricate with clean silicone

grease. With two fingers, insert O-ring in groove below

threads of housing and press into place. Tighten housing

back onto cap.

3.

 Open the cold water supply and tank valve.

If leaks persist, call Technical Support.

Leaks on tank valve assembly

1.

 Open drinking water faucet to drain storage tank. Let

drinking water faucet run until it drips. Turn off cold water

supply.

2.

 Push in on white collar of tank valve fitting and pull out

tubing. Unscrew the tank valve from the storage tank.

Rewrap threads on top of the tank with plumber tape. Screw

tank valve back onto tank. Trim 1/2-inch from end of tubing

and reinsert 5/8-inch into tank valve fitting.

3.

 Open the cold water supply and shut off the reverse osmosis

faucet. Let the system pressurize for several hours and

check for leaks. Check again after tank is fully pressurized.

Leaks on quick-connect fittings

1.

Close the cold water supply and tank valve.

2. Depress plastic collar and pull out tubing.

3.

 Cut off 1 inch of tubing and place a mark 5/8-inch from end

of tubing. Tubing should be cut squarely. The internal and

external burrs should be removed.

4.

Push tubing 5/8-inch into fitting.

5.

 Open the cold water supply and tank valve. If leaks persist,

call Technical Support.

No flow or slow flow from the brine (drain) line

Less than 1½ cups per minute

NOTE:

  Before checking brine (or reject) flow, make sure the 

system is producing water by turning off the valve on the 

storage tank and opening the faucet. Water should drip 

from faucet.

1.

 Examine the pre-filters. If clogged, replace (see Replacing

the Pre-Filters and Post-Filter on page 9) and recheck the

brine (or reject) flow rate.

2.

 If the pre-filters are not at fault, the brine (or drain) flow

controller is probably clogged. Call Technical Support.

Reduced production

Slow or no product water flow usually indicates either a 

clogged pre-filter or an exhausted membrane. First, replace 

the pre-filters. If the production rate is not improved, replace 

membrane.

Gradual return of taste and odor

Gradual return of unpleasant taste and odor over a period 

of time may indicate that your filter cartridges and/or RO 

membrane need to be replaced. See Replacing the Pre-Filters 

on page 9 and Replacing the Reverse Osmosis Membrane”on 

page 10.

Sudden return of taste and odor

If shortly after complete servicing noticeable taste and odors 

return contact Technical Support.

No water pressure from the drinking water faucet 

or low volume in storage tank

1.

Close the cold water supply to system.

2.

 Lift storage tank to see if it is empty. If not, open the drinking

water faucet to empty water from tank.

NOTE:

  It may be necessary to pump a small amount of air into 

the tank with a bicycle pump to remove all the water 

from the tank.

3.

 When tank is empty, use a pressure gauge to check

tank pressure. An empty tank should contain 5 to 7 psi

pressure. Increase or decrease the air pressure in the tank

accordingly.

4.

 Open cold water supply. Let system run for 3 hours to fill

tank, then check system performance. If performance has

not improved, call Technical Support.

TROUBLESHOOTING GUIDE

RAIN

 GRO-

4

75

 Installation and Operation Manual • 11

Summary of Contents for GRO-475

Page 1: ...www rainwaterlv com Rain Water Conditioning of Las Vegas RAIN GRO 475 4 STAGE REVERSE OSMOSIS WATER FILTRATION SYSTEM INSTALLATION AND OPERATION MANUAL 702 257 PURE 7873...

Page 2: ...ter PARTS INCLUDED SEE BACK OF MANUAL FOR DIAGRAM Pre assembled filter system mounting bracket encapsulated membrane element pre and post filter housings and pre and post filter cartridges Storage tan...

Page 3: ...hould be changed at least every 12 months to avoid chlorine bypass HOW REVERSE OSMOSIS WORKS The GRO 4550 Reverse Osmosis RO System uses a semi permeable membrane to reduce dissolved salts and mineral...

Page 4: ...ches if drill bit slips C Mark point with center punch Use a 1 4 inch drill bit to drill a pilot hole through sink D Use a 11 4 inch hole saw to enlarge hole Smooth rough edges with a file 3 Mounting...

Page 5: ...e tubing Do not kink tube Cut the tubing squarely below the nut and remove the internal and external burrs B Loosen the compression nut two complete turns Insert the tubing into the nut until it stops...

Page 6: ...to quick connect fitting on the left side of system Depending on the installation the system may need to be removed from the mounting surface to access the left side of the system C Cut the tube to a...

Page 7: ...ank is filled open the faucet to flush the post filter cartridge Allow 4 to 5 minutes for all of the water to drain from the tank Close faucet and allow tank to fill F Repeat step E four times NOTE In...

Page 8: ...2 Close tank valve on top of storage tank 3 Turn off water to RO system at the cold water supply or at the feed water supply adapter 4 Open drinking water faucet to relieve pressure 5 Locate tubing pe...

Page 9: ...sure to install cartridges in proper housings see diagram below 8 Screw bottoms of housings back onto caps securely do not over tighten Turn on cold water supply Check for leaks Continue to check peri...

Page 10: ...system to catch any water that spills during removal of the filter housings 2 Open drinking water faucet to drain tank When tank is drained close faucet 3 Disconnect the tubing connections from the G...

Page 11: ...e system is producing water by turning off the valve on the storage tank and opening the faucet Water should drip from faucet 1 Examine the pre filters If clogged replace see Replacing the Pre Filters...

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