Mount The Faucet; Prepare The System For Installation - 3M 3MRO401 Installation And Operating Instructions For

Drilling hole through Porcelain/Enamel/Ceramic Sinks
If you are reading this section, professional installation is highly
recommended.
Recommended Tools:
• Variable Speed Drill
• Porcelain Cutter Tool Set (7/8" Size)
• Plumber's Putty
Note: It is important to understand this procedure.
1. The glassy layer of porcelain/enamel/ceramic must be scored
through to the metal base, creating a disk.
2. This disk must be removed while protecting the surrounding deco-
rative coating against chipping or fracturing.
3. The base metal must be drilled through to complete the hole.
Procedure:
1. Mark center for 7/8" hole.
2. Form a dam of shallow putty around hole location and fi ll with
enough water to lubricate carbide drill bit.
3. Carefully drill pilot hole through porcelain/enamel/ceramic and base
metal using a carbide pilot drill bit. Always operate drill with light
pressure at slow speed (300 - 400 rpm).
4. Drill porcelain/enamel/ceramic using special 7/8" cutting tool,
making certain a complete ring has been cut through to the sink's
metal base.
5. Change to metal cutting drill bit and drill out the center of the ring,
making sure not to contact other rim of decorative coating. Cut
through metal sink base.
E. MOUNT THE FAUCET
Undercounter installations require a faucet with a built-in air gap
such as the one included with the system.
Undercounter Installation With An Air Gap Faucet (Air Gap is provided
by hole 1" above faucet base):
1) Familiarize yourself with all of the components shown in the air
gap faucet diagram. (See Fig. 2)
2) The rubber washer may be re placed with a bead of plumber's putty for
a neater appearance. Remove 3/8" tubing in front of the black faucet
handle and discard. Push faucet spout into where the 3/8" tubing was
just removed.
3) Slide the chrome base plate and rubber washer up the threaded base
of faucet.
4) Connect the 1/4" green tubing supplied in the installation kit to the
smaller barb on the air gap faucet. Push it on firmly until it seats.
5) Connect the supplied 3/8" black tubing to the larger barb on the air
gap faucet. Push it on firmly until it seats.
6) From above the sink countertop, feed the air gap tubing and the
threaded nipple through the faucet mounting hole and position the
faucet spout over the sink.
7) From below the sink/countertop, install the white spacer (open side
toward the air gap tubing), flat washer, lock washer and hex nut onto
the threaded nipple and tighten it by hand.
8) Back off on the hex nut just enough to slide the slotted washer (open
side toward the air gap tubes) between the white spacer and the
underside of the sink/countertop.
9) After rechecking the faucet orientation, tighten the hex nut with a
9/16" wrench until the faucet feels secure.
10) From above the sink, make any minor orientation corrections by turning
the faucet on its flats with a padded adjustable wrench. Use care not to
mar the finish.
Faucet with Air Gap
Side View
Chrome base plate
Rubber washer
Flat washer
Threaded nipple
Hex nut Lock washer
1/4" x 3/8"
tube connector
F. PREPARE THE SYSTEM FOR INSTALLATION
Check to see that the air charge in the empty tank is approximately
7 psi (48 kPa). Note: Check the storage tank air pre-charge. Adjust it if
necessary. To help keep the membrane as clean as possible, the RO
membrane cartridge has been shipped separately in a sealed plastic bag.
6
Back View
Air Gap hole
C.L.
Slotted washer
Spacer
Black 3/8" Reject
tubing to drain
1/4" x 3/8"
tube connector
Blue 3/8" Product
water tubing connection
Fig. 2
1/4" Standard
green tubing
Special red "SFC"
tube from RO
Blue 3/8" Product
water tubing
connection