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SHURFLO Diaphragm Pump Blaster II 12V

SHURFLO 4238-121-E07 - Diaphragm Pump 4 Chamber, Blaster II, 12VDC Intermittent Duty Sealed Motor, Up To 3.7GPM Open Flow, 45PSI Adjustable Demand Switch, 1/2” x 14 NPSM Male Threaded Ports, Includes Two 3/4” Hose Barb Straight Swivel Fittings a Male Garden Hose Fitting and a Pistol Grip Sprayer, 6.3 Amps, Ignition Protected, CE Rated, Fresh or Salt Water Washdown Pump. *Replaces SF 3901-2214.

Reference: SF 4238-121-E07

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SHURFLO 4238-121-E07 Diaphragm Pump Blaster II 12V (Replacement for SF 3901-2214).
SHURFLO 4238-121-E07 Diaphragm Pump Blaster II 12V (Replacement for SF 3901-2214).

SHURFLO’s BLASTER™ II wash down pump design was created with a 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 washdown 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.


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


Marine fresh or salt water wash-down installation. This pump may be used for general water transfer.


Type: 4 Chamber Diaphragm pump
Ports: ½”-14 NPSM-Male
Liquid: 130°F [54°C] Max
Dry-Prime: 6 feet [1.82 M]
Run Dry: Yes
Inlet Pressure: 30 PSI Max. [2.06 Bar]


Motor: 12V DC Permanent Magnet, Intermittent Duty.
Protection: Thermal Overload, Automatic Restart
Leads: 14 AWG, 14 ¾” [37 cm] Red +, 15” [38 cm] Black
Fuse: 10 Amp Recommended
Control: Shut-Off 45 PSI [3.1 Bar] ± 2 PSI [0.13 Bar]
Re-start 30 PSI [2.0 Bar] ± 2 PSI [0.13 Bar]


Approx. Net Weight: 5.2 lbs. [3.4 Kg] ea.
Carton Qty.: 6
Approx. Carton Weight: 31.2 lbs. [ 14.1 Kg]
Approx. Carton Size: 24”L X 18”W X 6”H [61cm x 46cm x 15cm]
Retail (individual) box: 11”L X 6”W X 5”H [28cm x 15cm x 13cm]

Shurflo 4238-121-E07


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