20 REVERSE OSMOSIS INSTALLATION AND USER GUIDE BARRIE ● ONTARIO ● CANADA 705.733.8900 WWW.EXCALIBURWATER.COM Problem Possible Cause Solution 4) Drain water overflows at the air gap faucet a) Drain tubing is clogged a) Clear drain tubing b) Drain clamp hole is misaligned b) Align with hole in the drain pipe c) Excessive drain flow rate c) Replace Reverse osmosis drain restrictor 5) High Total Dissolved Solids (TDS) in the Product Water a) Clogged sediment Pre-filter or Activated Carbon Pre-filter a) Replace clogged filters b) Low water pressure b) Reverse Osmosis feed water pressure must be above 40 psig c) RO membrane O-ring is crimped c) Check or replace O-ring d) RO membrane brine seal is not sealing up into the manifold head d) Check O-ring e) RO membrane is expended e) If RO membrane life is unusually short, find and correct the cause, then replace the membrane f) The product water and drain water lines are reversed f) Correct plumbing g) Drain restrictor is clogged g) Clear or replace RO drain restrictor h) ASO valve is not closing h) Repair or replace the RO ASO valve components i) New In-line or activated Carbon Prefilter not rinsed completely i) Flush with several full tanks of product water j) The RO feed water TDS has increased j) RO feed water TDS will give a corresponding increase in Product water TDS 6) RO faucet leaks or drips a) Leaks from spout a) Adjust RO faucet by turning the tee bar just below the handle to provide a small amount of free play in handle when shut off b) Leaks from base of the delivery b) O-ring is bad, replace O-ring c) Leaks from beneath the handle c) Replace the O-ring or replace the faucet 7) Reverse Osmosis fitting leaks in general Close the feed water ball valve and relieve pressure before disconnecting any tubing or replacing any fitting. Before replacing a fitting, recut and reinsert the tubing to see if that solves the leak. If pipe threads are leaking, remove and re-tape
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