QP3Ti TRASH PUMP • OPERATION AND PARTS MANUAL —REV. #1 (05/07/18) — PAGE 13
NEVER place the pump on
soft soil.
The suction hose or
pipe connection should always be checked for tightness
and leaks. A small suction leak in the hose or fittings could
prevent the pump from priming.
Elevation
Higher elevations will effect the performance of the pump.
Due to less atmospheric pressure at higher altitudes,
pumps
DO NOT have the priming ability that they have at
sea level. This is due to the “thinner air” or lack of oxygen
at higher altitudes.
A general rule of thumb is that for every 1,000 feet of
elevation above sea level a pump will lose one foot of
priming ability.
For example, in Flagstaff, Arizona where the elevation is
approximately 7,000 feet, the pump would have a suction
lift of only 18 feet rather than the 25 feet at sea level.
Table 4 shows suction lift at various elevations.
Table 4. Suction Lift at Various Elevations
Altitude
Feet
(Meters)
Suction Lift in Feet (Meters)
Sea Level
10.0 (3.048) 15.0 (4.572) 20.0 (6.096) 25.0 (7.620)
2,000 (610)
8.80 (2.680) 13.2 (4.023) 17.6 (5.364) 22.0 (6.705)
4,000 (1,219)
7.80 (2.377) 11.7 (3.566) 15.6 (4.754) 19.5 (5.943)
6,000 (1,829)
6.90 (2.103) 10.4 (3.169) 13.8 (4.206) 17.3 (5.273)
8,000 (2,438)
6.20 (1.889) 9.30 (2.834) 12.4 (3.779) 15.5 (4.724)
10,000 (3,048) 5.70 (1.737) 8.60 (2.621) 11.4 (3.474) 14.3 (4.358)
Table 5 shows percentage drops in performance as
elevation increases.
Table 5. Performance Loss at Various Elevations
Altitude
Feet (Meters)
Discharge Flow Discharge Head
Sea Level
100%
100%
2,000 (610)
97%
95%
4,000 (1,219)
95%
91%
6,000 (1,829)
93%
87%
8,000 (2,438)
91%
83%
10,000 (3,048)
88%
78%
GENERAL INFORMATION
APPLICATION
The Multiquip QP3Ti Trash Pump is designed to be used
for dewatering applications. Both the suction and discharge
ports on the QP3Ti trash pump use a 3-inch diameter
opening,which allows the pump to pump at a rate of
approximately 396 gallons/minute (gpm) or 1,500 liters/
minute (lpm).
This Wet Primed pump requires that the pump casing
is first filled with water to assist with initial self-priming
operations. Once a partial vacuum is created within the
unit, the reduced atmospheric pressure allows water to
flow through the suction line and the centrifugal force of
the impeller/volute assembly permits water to be expelled
from the discharge ports.
TRASH PUMP
Trash pumps derive their name from their ability to handle
a greater amount of debris and solids than standard
centrifugal pumps. These pumps generally handle solids
up to 1/2 the size of the discharge opening making them
less likely to clog. Also trash pumps are capable of handling
water with 25% solids by weight.
The advantage of using a trash pump is that it can be
quickly and easily disassembled in the field "without tools"
and easily cleaned when clogged.
POWER PLANT
This trash pump is powered by a 8.6 horsepower air cooled
4-stroke, single cylinder HONDA iGX270 gasoline engine
that incorporates a low “Oil Alert Feature.”
OIL ALERT FEATURE
In the event of low oil or no oil, the HONDA iGX270 engine
has a built-in oil alarm engine shut-down feature. In the
event the oil level is low the engine will automatically
shutdown.
SUCTION LIFT
This pump is intended to be used for dewatering applications
and is capable of suction lifts up to 25 feet at sea level. For
optimal suction lift performance keep the suction hose or
line as short as possible. In general always place the pump
as close to the water as possible.
PUMP SUPPORT
The pump should always be placed on solid stationary
ground in a level position.
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