Shurflo 5901-4202, 5901-3202 Installation Manual

EXTREME PRO BLASTER WASH-DOWN PUMP

A U/L approved marine duty (ignition protected) switch rated at or above 15 amps is

INSTALLATION AND OPERATION MANUAL

The Extreme Pro Blaster delivers water on demand. With the spray nozzle off (output side
closed) the pump will turn off. As the nozzle is opened, the pressure within the hose (output
side) drops. Once the pressure drops below a predetermined point, the pumps pressure
switch closes and the pump operates. With the nozzle set at a fine mist the pump will cycle, as
it is able to pressurize the hose faster than water being released. If the spray nozzle is held
wide open the pump may operate continually. The pump may momentarily operate even after
the nozzle is closed, as it pressurizes the hose. Once the pressure setting is reached the
switch opens and the pump stops.

DUTY CYCLE

Wash-down pumps are rated for intermittent duty, as they operate at higher than average
pressures. Operating a pump continuously for more than twenty (20) minutes, within an hour
period, is not recommended. Actual duty cycle is determined by amp draw, temperature, and
rate of cycling.

NOTE: Rapid cycling should be minimized to ensure long life. Rapid cycling is defined as

ON/OFF within two seconds. For best results, use the 2 gal SHURflo stainless steel

accumulator tank model # 3400 series.

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 integral thermal breaker and interrupt operation. When the
temperature drops the breaker will automatically reset and start operation.

• Mount higher than the outside water (sea) level. The pump is capable of a 6 ft. [2 M] vertical
prime above the outside water level. 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 vessel's hull.

Use #8 stainless steel hardware 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-tightening, flattening, or oversized screws will reduce the mounting
pads ability to isolate vibration and noise.

ELECTRICAL

• The pump should be on a dedicated (individual) circuit protected by the specified fuse
indicated on the motor label.

•

recommended, and must interrupt current flow on the positive (+ red) lead.

CAUTION:

Use of "open" type switches (not ignition protected) may cause an explosion of fuel vapors.

• Wire size (gauge/Mm2) is based on the distance from the power source to the pump. The
minimum recommended wire size is #14 gauge [2.5Mm2]. For lengths of 20-50 ft. [6-15M] use
#12 gauge [4Mm2]. The pump must be grounded to a "known ground" (battery). The ground
wire must be the same size as the positive wire.

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PLUMBING

• SHURflo quick connect fittings provide easy installation and removal if required. The fittings are
designed with dual o-rings, creating a seal when snapped into place.

• Avoid any sharp radius in tubing that may kink over time. Route tubing away from any heat
(exhaust manifolds etc.) and fasten securely.

• Inlet tubing (½"I.D. min.) from the seacock valve to the pump should be rated for vacuum. If
rigid pipe is utilized, SHURflo recommends that the pump inlet port be plumbed with 1 ft.
[.3M] of flexible tubing. Standard garden hose is not suitable as inlet tubing as it may collapse
under vacuum, reducing water flow.

• The pump outlet port should not be connected to rigid (plastic) pipe. Normal oscillation of the
pump may transmit through rigid plumbing causing noise and possibly loosen or crack
components. A 1ft. [.3M] length of flexible high-pressure tubing is suggested.

NOTES:

• To prevent cavitation, through hull fittings should be located at least 12 in. 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.

STRAINER / FILTRATION

Installation of a 40-mesh minimum strainer, such as SHURflo series 253 or 254, is
recommended to prevent debris from entering the pump. SHURflo recommends at least 1ft.
(.3 M) of 1/2” or 3/4” (13mm) I.D. flexible high-pressure tubing on both ports. Ideally, the pump
ports and strainers should not be connected to plastic or rigid pipe. The pump’s normal
oscillation may transmit through rigid plumbing causing noise, and possible loosen or cracking
components. SHURflo quick-connect fittings provide easy installation and removal if required.

CAUTION:

The strainer must be mounted above the outside water line to prevent water from siphoning during
cleaning. Mount the strainer where it can be inspected an cleaned easily without closing the
seacock valve.

WINTERIZING

If water is allowed to freeze in the system, serious damage to the plumbing and pump may occur.
Failures of this type will void the warranty. The best guarantee against damage is to completely drain the

wash down system. To properly drain the system perform the following:

• Drain the water tank. If the tank doesn’t have a drain valve, open all faucets and let pump

run until tank is empty.

• Open all the faucets (including the lowest valve or drain in the plumbing) and allow the

pump to purge the water from the plumbing system, and then turn the pump OFF.

• All faucets should be left open to guard against any damage.

• Potable water anti-freeze may be poured into drains to protect p-traps and waste system

from freezing.

• Fill system and sanitized before re-use.

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