Hydrotech PURA QCRO Series Quick Change Reverse Osmosis Drinking Water System - Manual (Page 20)

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4  1
Many homes are equipped with disposals and dishwashers. Special care must be taken when these appliances are
present to prevent improper air gap performance. Home drain plumbing must be free of any blockage since this may
cause a backup of dishwasher and disposal waste into the air gap outlet tube and result in improper air gap performance.
To perform a simple drain check, fill the sink basin with several inches of water, pull the plug, and observe the drainage. If
water backs up into the second sink (if present), or if drainage is slow or there is excessive gurgling, drain blockage may be
present.
Undersink drain plumbing usually resembles one of the following descriptions. In all cases, the drain tubing from the air gap
(RO outlet) should run downward, free of dips and loops. The air gap outlet must not be connected to the effluent side of
the trap. This can vent sewer gas, which will produce foul odors.
Single basin sink without disposal
• Connect the RO outlet to the tailpiece directly beneath the sink.
• If a dishwasher drain connection is present, the RO outlet must be connected above it.
Single basin sink with disposal
• Connect the RO outlet to the dishwasher drain port on the
disposal if available.
• If the dishwasher drain port is not available, other arrangements
must be made such as running the RO outlet to a basement sump.
• Do not connect the RO outlet to the plumbing below the disposal.
Double basin sink with disposal, single trap
• The fitting which joins the drains from the disposal and second
sink should be directional. If not, then we recommend that it be
replaced.
• Connect the RO outlet to the tailpiece just below the second sink.
• If a dishwasher drain is present and cannot be relocated, the RO
outlet must be connected above it.
• Do not connect the RO outlet to the horizontal plumbing between
the two sink drains.
Double basin sink with disposal, double trap
• Connect the RO outlet to the tailpiece just below the second sink.
• If a dishwasher drain is present and cannot be relocated, the RO outlet must be connected above it.
Step 5 – install Reservoir tank
Place the reservoir tank in the location previously selected.
Figure 14
1. Install the drain saddle
valve on to the drain pipe.
See figure 7 on page 9
for its location. Use 3/8”
saddle for air gap faucets
or 1/4” saddle for stan-
dard faucets.
2. Tighten the clamps with
the help of the two bolts.
3. For standard faucets drill a
1/4” hole through one side
of the pipe. For air gap fau-
cets drill a 3/8” hole. The
drill should be kept straight
and centered to avoid
damaging the saddle
valve. Do not drill through
both sides of the pipe!
4. Attach 3/8” or 1/4” red
tube by slipping the tube
through the black com-
pression nut and hand
tighten the nut on to the
saddle valve.
CautioN: The drill should be
kept straight and centered to
avoid damaging the saddle
valve.
WaRNiNg! Do not
overtighten.
WaRNiNg! Do not
drill through both
sides of pipe!.
Sink
Disposal
Do not
install here
Install here
Drain Line from
Air Gap (Air
Gap Only)
Sink