Bixler's Inflatable Foot Pump measures up to 5.8 psi and has a 5 liter air/fill capacity per stroke. The pump adapter will fit most Walker Bay, TUG, and AB Inflatables.
Metrovac Magic Air 110-volt electric boat inflator could be the best companion an inflatable ever had. Plugs into a regular household outlet. Comes with a bayonet style adapter that fits the Halkey Roberts Valve and a Small Adapter for Pool Toys.