It says the plunger stops the flow of water. Unfortunately when you press to push out the grout/cement. This will cause the solution to dry out and clog the nozzle, forcing you to drain and refill it. I'll go back and buy the pistol version and hope it works better. it's more money but time is money and this option would serve me well if I was only going to work a small area but I need to grout and detail about 1000 square feet. stonework.
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