Delavan SmartFLO 3120-421F-SB 12V Diaphragm Pump, 2.0 GPM, 85-100 PSI, Demand-Bypass, 3/8" FNPT Ports

The Delavan SmartFLO 3120-421F-SB combines a pressure-sensing demand switch with an internal bypass valve, so it adapts flow to your system and eliminates harmful rapid on-off cycling. It delivers up to 2.0 GPM at 85-100 PSI through 3/8" FNPT ports and fits RV and marine water systems, small to medium sprayers and multi-outlet setups.

Key Features

• Combines the advantages of both Bypass and Demand Controls
• Utilizes Pressure Sensing Demand Switch AND Internal Bypass Valve
• Automatically adapts to changing system demands
• Constant and instant flow eliminates pump cycling
• Will turn off when not in use and outlets are closed
• Low chance of overheating when run for long periods
• 100% Factory tested
• Self-Priming
• Can be run dry
• High Torque Motor for superior flow at pressure
• 2 Year warranty from date of purchase

Applications

• RV and Marine systems
• Small to medium size sprayers
• Multi-outlet systems

Specifications

Frequently Asked Questions

What is SmartFLO technology?

SmartFLO pairs a demand switch with an internal bypass valve. The pump adjusts to changing demand, gives constant flow without cycling and still shuts off when all outlets are closed.

Why does rapid cycling matter?

Rapid on-off cycling wears out pressure switches and motors. SmartFLO eliminates it, extending pump life with no extra setup.

What are the electrical specs?

12 VDC, up to 8.5 amps, 12 AWG leads 6" long with a 2-pin molded connector.

What ports does it use?

3/8" FNPT threaded ports.

Will it overheat on long runs?

SmartFLO has a low chance of overheating during long run times because it does not cycle rapidly.