Sto Corp.

The Sto F-21 All Purpose Pump can spray most company products and operates off of single-phase 230-volt power, readily available at most job sites. It has a flow rate of 21 liters per minute and can spray up to 210 feet. The company has optimized its Powerwall Stucco to work with the pump, resulting in a pumpable stucco mixture that sprays on better than any stucco on the market.

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