SIMPSON Cleaning 82235 Dial-N-Wash Professional Pressure Regulator for Gas Pressure Washers, Cold Water Application Only Select correct pressure for the cleaning application Universal to most gas pressure washers up to 4500 psi Use with any standard spray wand and standard gun with M22 connectors Adjust pressure from 1000 psi to max psi with a simple twist Clean hard surfaces such as brick and concrete siding