9
Pool Base Install
Finish pool base even with upper edge of MDX-R3 sump (Fig. 1).
Liner Install
1. Make sure bottom gasket is in place before installing liner.
2. Set liner in pool and draw tight with vacuum.
3. Install top gasket, seal ring and 12 screws.
4. Cut out liner inside of sump. Be sure to trim liner right up to the inside diameter of seal ring.
Assemble the Drain PRIOR to Adding Water
1. Remove 4” pressure plug (#10).
2. Install funnel assembly (#3) onto sump (#9) and secure with 4 (four) security screws (#2) with
screw driver security T25 (#24).
3. Install the cover (#1) onto the funnel assembly (#3) and secure with 3 (three) security screws (#2).
1. Select the installation location for the SDX2
drain (Additional SDX2 drains may be used.)
2. For Steel Wall: Make one 4½” hole using
a Greenlee® Standard Round Knockout
Punch (Greenlee.com - Cat No. 742BB /
UPC No. 19978)
For Plastic Wall: Cut one 4½” hole using
a 4½” hole saw.
For Concrete Wall: Embed one SDX2
Bulkhead fitting. Protect vinyl liner mounting
surface from concrete and align the back of
the flange with the interior surface to allow
room for rolled foam around the fitting.
3. Install the SDX2 Bulkhead Fittings with the
“UP” arrow located at the top. (Fig. 3)
a. Discard the Solid Gasket used for
fiberglass shells.
b. Mount the SDX2 Bulkhead
Fittings in the wall with the UP
arrows at the top.
c. Secure with the SDX2 Nut. (Not
needed for concrete walls.)
4. Connect the pipe to the secondary outlet of
the MDX-R3.
MDX-R3 VINYL INSTALLATION
SDX2 VINYL INSTALLATION
Fig. 3
UP Arrow
Vinyl Liner
Summary of Contents for MDX-R3
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