Pump Pre-Use Checkpoints - Generac Power Systems MAGNUM MTP4SZ Owner's Manual

Operation
FLOW (GPM)
SUBMERGENCE WITHOUT BELL (FT)
PIPE ID (in) - No Bell SUBMERGENCE WITHOUT BELL (FT)
3 4.7
4 3.3
6 2.1
8 1.7
10 1.6
Attach a flexible hose/pipe to the outlet (discharge)
10.
side of the pump.
NOTE: Verify the O-ring seal is present in the fitting on
the pump before attaching the fitting. Lubricate the O-ring
seal with grease to maintain an airtight seal.
Use a concentric taper on the discharge side to
11.
increase discharge pipe/hose diameters.
NOTE: All valving and additional fittings should be the
same size as the discharge main-line. The discharge size
should be adequate to maintain reasonable velocities
and reduce friction losses. It is strongly recommended
that a pressure relief valve is installed on the discharge
piping.
Check the intake and outlet hoses for sharp bends
12.
or kinks that may restrict pump flow. The intake
hose should slope upwards toward the pump to
avoid development of air pockets in the hose,
which may lead to pump cavitation. Keep the
hoses as straight as possible.
Remove the cover from the top of the pump volute
13.
and fill the pump casing with water.
NOTE: The pump is self-priming, but should never be
operated unless there is liquid in the pump casing. The
pump casing needs to be half filled with liquid in order to
prime.
NOTE: The casing will only fill to the bottom of the intake
fitting, not to the top of the volute. Replace the cover and
hand tighten the clamp screws.
34
Table 3: Pipe Submergences
500 1000 1500
6.3
3.7 5.3
2.8 3.8
2.3 3.1
2000 2500 3000
4.9 6.0
3.8 4.6 5.4

Pump Pre-use Checkpoints

Before using the pump, check the following:
• Place the pump as close as possible to the liquid
being pumped, keeping the number of hose
sections and couplings to a minimum.
• The pump should be the highest point between
the intake and outlet section of the suction hoses.
• Verify the ground is firm and as level as possible.
• Block the wheels on the trailer to keep it from
moving.
• Check the pump discharge area; verify discharge
will not erode the material under the pump or
damage any nearby structures.
• Verify all hose couplings are of the same size and
type.
• All hoses/piping should be supported, braced and
lined up square before connecting to the pump
flanges.
• A flexible fitting is recommended on both suction
and discharge to eliminate misalignment loads or
stresses being transmitted to the pump.
Owner's Manual for Wet-Prime Trash Pumps
3500 4000 4500
6.1 6.9 7.6
01644