Pentair SHURFLO BLASTER 4238, SHURFLO BLASTER 4338 Series Series Manual
SHURFLO® BLASTER™ II 3.5 GPM
MARINE WASH DOWN PUMP
MODEL SERIES 4238 & 4338
SHURFLO BLASTER™ II Designed for the toughest wash down applications.
SHURFLO’s BLASTER™ II wash down pump design was created with unique over-molded single-piece diaphragm, assuring long
life and top performance in all deck wash down plumbing systems. Designed as the next legendary pump to exceed the expectations of our customers, the BLASTER™ II pumps are designed for the toughest marine wash down applications. SHURFLO’s
quality reputation has been built on the reliability and dependability of every pump we build. The BLASTER™ II wash down automatic demand pumps are quiet, thermally protected and can run dry without damage.
FEATURES
❚ 4 independent chambers
❚ Co-Molded diaphragm
❚ Adjustable pressure switch
❚ Self-priming up to 6 feet
❚ Sealed switch
❚ Sealed motor
❚ Corrosion resistance electro coated
motor
❚ Thermally protected
❚ Ignition protected, CE
INSTALLATION TIPS
❚ Properly sized plumbing
❚ Properly sized wiring
❚ Mount in a dry location that allows
easy access if maintenance is required
❚ Mount higher than the outside water
level, the pump is capable of 6ft. vertical
prime above water line
❚ Use proper fuse size
❚ Install strainer on pump inlet
❚ Minimize plumbing elbows and valves
❚ Flexible high-pressure hose on inlet
and outlet
911-1047 REV. B 1
OPERATION TIPS
❚ Pump is design for intermittent operation only
❚ Turn off power to the pump when boat
is unattended
❚ Maintain your strainer clean for ultimate pump performance
❚ Pump will perform at best when
proper voltage is provided
APPLICATION
❚ Marine 12V DC or 24V DC systems –
see pump label for rated voltage
❚ Wash Down applications
❚ General water transfer
SHURFLO’s BLASTER™ II wash down
pump design was created with unique
over-molded single-piece diaphragm,
assuring long life and top performance
in all deck wash down plumbing systems. Designed as the next legendary
pump to exceed the expectations of our
customers, the BLASTER™ II pumps are
designed for the toughest marine wash
down applications. SHURFLO’s quality
reputation has been built on the reliability and dependability of every pump
we build. The BLASTER™ II wash down
automatic demand pumps are quiet,
thermally protected and can run dry
without damage.
DUTY CYCLE
See pump label for fuse size
Ignition protected
U/L marine switch
SHURFLO
strainer
Inlet
SHURFLO
spray nozzle
Battery
Black
Red
Use flexible high pressure tubing
from thru-hull fitting, strainer,
and pump. Tubing should be rated
for below water line use.
PumpSHURFLO
Outlet
6 ft. max [1.82 m]
Verical lift from
outside water lavel
to pump inlet port
Wash down pumps are rated for intermittent duty ONLY, as they operate at
higher than average pressures. Operating a wash down pump continuously for
more than 20 minutes, within an hour
period, is NOT recommended. Actual
duty cycle is determined by amp draw
and temperature.
MOUNTING
❚ Consider a DRY location that allows
easy access if maintenance is required.
The pump should not be located in an
area of less than one cubic foot unless adequate ventilation is provided.
Excessive heat may trigger the thermal
protector and interrupt operation. When
the temperature drops the thermal
breaker will automatically reset and
start operation.
❚ Mount higher than the water level.
The pump is capable of a 6 ft. [1.82
Meter] vertical prime. The pump can be
mounted in any position. If mounting the
pump vertically, the pump head should
be in the down position.
CAUTION: Do not drive screws through
the vessels’ hull. Use #8 stainless steel
screws to fasten the pump. Choose a
solid surface (bulkhead or stringer)
that will not amplify pump sound. The
mounting feet are intended to isolate
the pump from the mounting surface;
over-tighten, flattening or oversized
screws will reduce the mounting ability
to isolate vibration and noise.
Sea-cock
valve
Through
hull fitting
ELECTRICAL
❚ The pump should be on a dedicated
(individual) circuit protected by the
specified fuse on the motor label.
❚ A UL marine duty switch (ignition
protected) rated for 15 amps or higher is
recommended, and must interrupt current flow on the positive (+ red) lead.
❚ SHUT OFF POWER TO THE PUMP
WHEN LEAVING THE BOAT UNATTENDED.
Ft. [m] AWG [mm2]
0-20 [0-6] 14 [2.5]
20-50 [6-15] 12 [4]
50-70 [15-21] 10 [6]
70-100 [21-30] 8 [8]
Minimum Wire Size for a 10% voltage drop on a 12VDC, 15 Amp
Circuit. Length is the distance from the power source to pump
and back to ground.
NOTES
❚ To prevent cavitation, through hull
fittings should be located at least 12
inches [304 mm] off the centerline of the
water pick-up for the motor.
❚ The through hull fitting must have a
seacock valve to shut-off in case of an
emergency.
❚ Always use high quality non-corrosive
fittings, valves and hardware to assure
long-term reliability.
❚ Properly seal all pipe threads before
the strainer to prevent unforeseen
leaks. Never use Teflon tape or sealing
compounds on SHURFLO pump threads
or fittings. Sealer may enter the pump
causing a failure not covered under
warranty.
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