Installation
with Vertical Switch
with Tethered Switch
13" Min. with
Vertical Switch
13" Min. with
18" Min. with
Tethered Switch
Vertical Switch
15" Min. with
Diaphragm Switch
Figure 1
1A. Minimum sump size: 10" (254mm) diameter
by 13" (330.2mm) depth for vertical switch
models.
1B. Construct the sump pit of tile, concrete, steel,
or plastic; it must meet code requirements.
1C. No clay, earth, sand, or gravel in the sump
(they will clog the pump). Keep the pump inlet
screen clear.
Figure 2
2A. Install the discharge plumbing and check valve,
using PTFE pipe thread sealant tape — NOT
pipe joint compound.
2B. Tighten the pipe into the pump (hand tight
+ 1-1/2 turns).
2C. Install a check valve in the vertical pipe to
prevent flow backwards through the pump
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when it shuts off. To prevent airlocking the
pump, drill a 1/8" (3.2 mm) hole in the discharge
pipe just above where it screws into the
pump discharge. Install the check valve above
this hole, but keep it as close to the pump
as possible. Be sure the hole is below the
waterline and below the check valve.
For parts or assistance, call Master Plumber Customer Service at 1-800-628-9439
10" Minimum
10" Minimum
with Vertical and
Diaphragm Switch
14" Minimum
Sump Pit
Hard Surface –
No Sand, Clay,
Gravel
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2D. To reduce noise and vibration, cut the
discharge pipe near the pump and fasten a
short length of rubber hose (1-7/8" (48 mm) I.D.,
e.g. radiator hose) into it with hose clamps.
3. Place the pump in the sump; make sure that
nothing interferes with switch operation.
4. Finish installing the necessary plumbing.
Follow the glue manufacturer' s instructions for
safety precautions and curing time.
Figure 3
Risk of flooding. Make sure the pump
cannot move in the sump. If the pump moves
when it runs, the piping or sump wall may
interfere with the switch and prevent the pump
from starting or stopping.
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3