Lafferty pressure washer systems add foam and chemical spray to a pressure washer you already own. The injector sits on the washer outlet and draws chemical into the water, so no chemical passes through the pump. An airless foam wand makes clinging foam, and a bypass valve sends full pressure through the same hose to rinse. These systems suit fleet yards, mine sites and contract cleaners who already run a pressure washer and want foam without a separate wall station. They are built in stainless steel and use the same colour coded metering tips as Lafferty's wall units.
Buying guide
Match the system to your washer flow. The Model 20 SS suits washers of about 13 to 21 L/min. Tell us your washer's flow and pressure and we will confirm the model.
2-Way models run two chemicals or two strengths, for example a detergent and a brightener. Systems are supplied without hose and gun. The matched Lafferty hose and gun kit avoids draw problems from the wrong hose size.
For a fixed bay without a pressure washer, see the air driven foamers.
Common questions
Does chemical go through my pressure washer pump?
No. The injector is downstream of the pump, which protects the pump and seals.
Can I rinse without changing hoses?
Yes. Open the bypass valve to rinse at full pressure through the same hose.