Automatic Demand Control	Saves wear on the pump and power on mobile systems (e.g., battery life in 12 V), smoother operation, better user experience
Chemical Resistance	Longer service life with aggressive fluids; fewer failures due to chemical degradation
Self-Priming	Fewer installation constraints (no need for flooded suction), better startup performance in many applications
Strong Flow/Pressure Rates	Versatile enough for spraying, fluid transfer, cleaning, and industrial use
Dry-Run Tolerance	Reduces risk of pump failure if liquid supply is interrupted

Built-in Check Valves	Enhances pressure hold-up and prevents loss of prime
Flexible mounting	Makes installation easier in tight or unconventional spaces
Bypass and/or Pressure Control	Good for applications with frequent on/off cycles or systems requiring consistent flow without automatic switching
Voltage & Applications	More options for different environments and power systems
Serviceability	Lower long-term ownership costs and less downtime

	PENTAIR SHURFLO 8000-543-236 Automatic-Demand Diaphragm Pump, 1.8 GPM With Vi...	PENTAIR SHURFLO 8000-543-238 On Demand 12VDC Diaphragm Pump with Pressure Swi...	PENTAIR SHURFLO 8000-543-250 Internal Bypass Agricultural Spraying Diaphragm ...	PENTAIR SHURFLO 8000-543-936 12V DC Standard Pump with Wire Harness, 1.8 GPM,...	PENTAIR SHURFLO 8000-812-288 On Demand Diaphragm Water Pump For Agriculture S...	PENTAIR SHURFLO 8000-912-288 Automatic Demand Industrial Diaphragm Pump For S...

Customer Reviews	507	176	58	82	142	76
Price	$113.99	$129.74	$128.71	$129.50	$246.54	$199.99
Voltage	12V DC	12V DC	12V DC	12V DC	115V AC	115V AC
Pump Type	Automatic Demand	Automatic Demand	Bypass	Automatic Demand	Automatic Demand	Bypass/Pressure Switch
Max Flow	1.8 GPM	1.8 GPM	1.8 GPM	1.8 GPM	1.4 GPM	1.4 GPM
Pressure Setting	60 PSI Switch	100 PSI Switch	50 PSI Bypass	60 PSI Switch	100 PSI Switch	105 PSI Switch
Port Size	3/8" FNPT	3/8" FNPT	3/8" FNPT	3/8" FNPT	3/8" FNPT	3/8" FNPT
Valve Material	Viton	Viton	Viton	Viton	Viton	EPDM
Diaphragm	Santoprene	Santoprene	Santoprene	Santoprene	Santoprene	Santoprene
Self-Priming	Up to 8 ft	Up to 8 ft	Up to 8 ft	Up to 8 ft	Up to 7 ft	Up to 6.5 ft
Control Style	Pressure Switch	Pressure Switch	Internal Bypass	Pressure Switch	Pressure Switch+Bypass	Pressure Switch+Bypass
Applications	Ag spraying, transfer	High-pressure spraying	Transfer where bypass needed	Chemical spraying	Carpet extraction / transfer	Extraction / fluid transfer

Industrial High-Pressure Output: Delivers a powerful 100 PSI (6.9 bar) max pressure and 1.8 GPM open flow, factory-set for precision in heavy-duty agricultural spraying
Advanced Chemical Resistance: Engineered with premium Viton valves and a Santoprene diaphragm to provide maximum durability against harsh farm chemicals
Automatic Demand Switching: Features an integrated, adjustable pressure switch (80-100 PSI range) that automatically turns the pump on at 85 PSI and off at 100 PSI
Superior Self-Priming Capability: The 3-chamber positive displacement design allows for vertical self-priming up to 10 feet and can safely run dry without damage
Rugged 12V DC Motor: Equipped with a permanent magnet motor (P/N 11-111-00) and zinc-plated steel fasteners, optimized for 12VDC nominal voltage and intermittent duty cycles

PENTAIR SHURFLO 8000-543-238 High Pressure 12V DC Diaphragm Pump, 1.8 GPM 100 PSI Automatic Demand Water Pump, Viton Valves & Santoprene Diaphragm, 3/8" NPT Female Ports for Agricultural Sprayers