INSTALLATION
Materials required:
2" PVC pipe with cement to match and in-line check valve. Be sure to install the check
valve so that the flow will be away from the pump.
1.
Install the pump on a solid, level foundation, or in a sump pit constructed of tile, concrete, steel, or plastic.
The recommended minimum diameter of the sump pit is 18" (46 cm) diameter and the minimum
recommended depth is 30" (76 cm). Check local codes for approved materials.
NOTICE:
Pump should not be installed on clay, earth, or sand surfaces.
2.
Clean the area around the pump of small stones and gravel which could clog the pump. Keep the pump
inlet screen clear.
3.
Secure the pump on a level, solid base. Do not suspend the pump by the discharge pipe, hose, or power
cord.
4.
5.
To reduce motor noise and vibrations, a short length of rubber hose can be connected into discharge line
near pump using suitable clamps.
6.
If the pump discharge line is exposed to outside subfreezing atmosphere, then the portion of line exposed
must be installed so any water remaining in pipe will drain to outfall by gravity. Failure to do this can cause
water trapped in discharge to freeze, which could result in damage to pump.
7.
Install a check valve in the pipe to prevent flow backwards through the pump when it shuts off. Make certain
the flow indicating arrow points away from the pump. This check valve will keep the water from either
running back into the basin or into the area being pumped out when the pump is not running. Check valve
should be a free flow valve that will easily pass solids.
NOTICE:
For best performance of check valve when handling solids, do not install it with discharge angled
more than 45° above the horizontal. Do not install check valve in a vertical position as solids may settle in
valve and prevent opening on startup.
8.
Drill a 1/8” (3.1 mm) hole in discharge pipe about 1"-2” (2.5 - 5.1 cm) above pump discharge connection to
prevent air-locking the pump.
9.
10.
After the installation of the necessary plumbing, check valve, and rubber hose, follow the glue
manufacturer’s instructions for safety precautions and curing time. The pump is ready for operation.
11.
Pump is designed for 115 V, 60 Hz, operation and requires a minimum 15-amp individual branch circuit.
12.
4
Install 2” discharge pipe into the 2” NPT discharge port. Use rigid plastic pipe and wrap threads with Teflon
tape,
NOT pipe joint compound
. Screw pipe into pump hand tight plus 1-1/2 turns.
Check the pump by filling the sump pit with water and observe the pump’s operation through one complete
cycle. Make sure the pump cannot move in the sump and float switch moves freely up and down.
For tethered piggyback float switch mounting. The length of the tether (distance of cord from float to clamp)
should be set around 3.5 inches (pre-set on the MD500T-G and MD500T-V) and should not be used in a
basin smaller than 18 inches in diameter. If using a differential other than the factory setting, be sure when
the pump shuts off at least 4.5” of fluid is left in the basin so the impeller remains submerged. Insert the
float switch piggy-back plug into a properly grounded outlet and the pump plug into the piggyback plug.
