We use something very similar to inflate our paddle boards with an electric pump - 2020 Red Paddle Co SUP Schrader Valve Inflation Adaptor RPCACC1 - Boardsports Not 100% sure if it's the same connector as goes into the air beams but there are alternatives available (cheaper) with a range of adapters.
Update: just seen @Loz has covered this particular subject via a new thread this morning - Inflatable connector
Update: just seen @Loz has covered this particular subject via a new thread this morning - Inflatable connector
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