Mazzoni PUMP MMD 15250L 15L/250BAR 1450RPM left sub_pumps You can also look at

You can also look at the side of the nozzles provided with your pressure washer for a number sequence

On MTM QC nozzles

Orifice Size - 15

The MTM Hydro SGS28 Pressure Washer Spray Gun is built for professional detailers and pressure washing contractors who need durability and control

The Rotojet is also repairable and comes in a variety of sizes to fit any cleaning situation

Mazzoni PUMP MMD 15250L 15L/250BAR 1450RPM left sub_pumps You can also look atPART NUMBER MODEL GPM PSI RPM HP BORE STROKE SHAFT P3. 020. 006 2 MMD15250L 4. 75 3625 1740 11. 69 20 mm 0. 787 in 12 mm 0. 472 in Left Italian manufactured high pressure pumps: Ground pistons for a smoother stroke and better oil tightness. Oversized shaft and long end section for better torque transmission. Extra thick ceramic pistons for greater durability Intake and delivery valves with larger water passages Rods made of a special alloy