Lol . . .
I've been down this road... the result being i have about 15 pumps around me.
Long story short.. the best way is with two pumps....
A high flow low pressure pump to inflate main thing to around 1psi.
Then swap to a high pressure low volume pump to raise the pressure from 1psi to 7psi.
...
my main pump for a few years has been the trusty Kamper Gale.
Kampa Gale 12v High Pressure Electric Pump : Amazon.co.uk: Sports & Outdoors
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...
but it did take ages to do the initial fill . . . . so . .
i ended up getting a cheap hi flow pump, to get the beams up . . . to then move over to the Gale. ( so basically had two pumps)
Shop Taylor & Brown 12V Portable Electric Air Pump / Inflate or Deflate Airbeds, Paddling Pools & Other Toys, Inflator Camping Airbed Pool Deflator, Includes 3 Nozzles. Free delivery and returns on all eligible orders.
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....
these two pumps . . . . (plus many more other ones have had us sorted for a number of years . . .
+++
till this year, !!!! where we upgrades to this two stage twin pump designed for SUPs.
This thing is Awesome . . .
it has two separate pumps inside, when you start it up the first pump does the quick fill to 1psi - at which point the second pump kicks in and raises the pressure to the 7psi setpoint.
its auto OFF as well.
just set the pressure 1-20psi and that's it. ( i set at 7psi for all the air-beam tests etc.)
Shop OutdoorMaster 20PSI High Pressure SUP Air Pump The Cachalot - Intelligent Dual Stage Inflation & Auto-Off, Deflation Function, 12V DC Car Connector for Inflatable Stand Up Paddle Boards, Boats. Free delivery and returns on all eligible orders.
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- UP TO 20PSI PUMP FOR ALL YOUR FRIENDS - Enjoy a sleekly designed paddle board pump with fast, high pressure inflation - Made to Share!
- FAST & POWERFUL DUAL STAGE & AUTO OFF FOR EASY INFLATION - Automatic dual stage pump: 1st stage for MAXIMUM SPEED at 350L/min and 2nd stage for MAXIMUM PRESSURE at 70L/min. The AUTO-OFF FUNCTION turns the pump off when target pressure is reached when inflating. When packing up the deflation function will MAKE DEFLATING QUICK & EASY.
- 12V DC CAR CONNECTOR & FULL SET NOZZLES ATTACHMENTS - Connects to your car's 12V DC connector. Features a 12A fuse for increased safety. Comes with full set of nozzles to fit most high pressure inflatables including C7 & H3 valve.
- DIGITAL DISPLAY WITH REAL TIME PRESSURE MONITORING - Use the digital display to set your desired pressure and monitor the pressure in real time. PUMPING HAS NEVER BEEN EASIER!
- ECO-FRIENDLY & TEST-APPROVED - The Cachalot has gone through rigorous testing and has CP65 and CE certifications. Durable quality and eco-friendly material offer a promising summer journey.
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so either get the two separate pumps.
or get the one twin SUP pump.
++++++++++++
they also do another version called the shark.
OutdoorMaster 20PSI High Pressure SUP Air Pump THE SHARK - Intelligent Dual Stage Inflation & Auto-Off Feature, Deflation Function, 12V DC Car Connector, for Inflatable Stand Up Paddle Boards, Boats : Amazon.co.uk: Sports & Outdoors
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About this item
- ACTIVE COOLING SYSTEM - The one and only SUP electric air pump with active cooling system up to 20PSI FOR 3 BOARDS IN A ROW - Enjoy a sleekly designed paddle board pump with fast, high pressure inflation and consistent cooling system - Made to Share!
- FAST & POWERFUL DUAL STAGE & AUTO OFF FOR EASY INFLATION - Automatic dual stage pump: 1st stage for MAXIMUM SPEED at 350L/min and 2nd stage for MAXIMUM PRESSURE at 70L/min. The AUTO-OFF FUNCTION turns the pump off when target pressure is reached when inflating. When packing up the deflation function will MAKE DEFLATING QUICK & EASY.
- 12V DC CAR CONNECTOR & FULL SET NOZZLES ATTACHMENTS - Connects to your car's 12V DC connector. Features a 12A fuse for increased safety. Comes with full set of nozzles to fit most high pressure inflatables including C7 & H3 valve.
- DIGITAL DISPLAY WITH REAL TIME PRESSURE MONITORING - Use the digital display to set your desired pressure and monitor the pressure in real time. PUMPING HAS NEVER BEEN EASIER!
- ECO-FRIENDLY & TEST-APPROVED - The SHARK has gone through rigorous testing and has CA65 and CE certifications. Durable quality and eco-friendly material offer a promising summer journey.