Nozzle size
Nozzle size 3.5: Active's range and the 1.25 mm orifice
A size 3.5 nozzle: MTM's 1.25 mm foam cannon orifice, the bottom of Active's 3.5 to 5.0 range for the Active 2.0, and its flow by pressure.
Also listed as 3.5 nozzle, 035 nozzle, 1.25 mm orifice
Short answer
A size 3.5 nozzle flows 3.5 GPM at 4,000 PSI, and by the formula Cat Pumps and General Pump publish about 3.03 GPM at 3,000 PSI and 2.47 GPM at 2,000 PSI (calculated). Active recommends sizes 3.5 to 5.0 for its Active 2.0, which ships with size 3.7 nozzles. MTM Hydro labels the 1.25 mm orifice installed in its PF22.2 foam cannon as size 3.5, and Active says to use foam cannon orifices of 1.25 mm or larger on the Active 2.0.
Key facts
- Orifice diameter
- MTM Hydro labels the 1.25 mm orifice installed in its PF22.2 foam cannon as size 3.5[1]MTM's labeling of a foam cannon orifice; no chart diameter for size 3.5 was recorded.
- Flow at common pressures
- Calculated with the formula Cat Pumps and General Pump publish: about 2.14 GPM at 1,500 PSI, 2.47 at 2,000 PSI, 3.03 at 3,000 PSI and 3.5 at 4,000 PSI[2][3][4]All calculated; reference math, not the measured output of any machine.
- Parts made in this size
- MTM Hydro's 1.25 mm orifice, installed in the PF22.2 foam cannon (SKU 14.5013)[1]
- Machines makers pair it with
- Active recommends nozzle sizes 3.5 to 5.0 for the Active 2.0, which ships with size 3.7 nozzles[5]Active's guidance for the Active 2.0 only.
- Spray angle
- Separate from size: Cat Pumps says spray angle does not affect nozzle flow[2]
- Wear
- Cat Pumps says worn nozzles are the most frequent cause of low pressure; replace a worn nozzle with the proper size, and never adjust the pressure regulating valve to make up for it[6]
- Not confirmed
- Not confirmedA chart diameter for size 3.5; tips or turbo nozzles sold as size 3.5 in the sources read; the Active 2.0's PSI and GPM.
Watch out for
- Active's 1.25 mm-or-larger foam cannon orifice advice is for the Active 2.0 only; it is not a rule for other electric washers.
- MTM ships the PF22.2 with the 1.25 mm (size 3.5) orifice installed and the 1.1 mm (size 3.0) one in the kit; check which one is fitted.
- Active gives no PSI or GPM for the Active 2.0, so its 3.5 to 5.0 range cannot be checked with the formula here.
Questions
Which nozzle sizes does Active recommend for the Active 2.0?
Active ships the Active 2.0 with 0, 15, 25 and 40-degree nozzles in orifice size 3.7 and recommends sizes 3.5 to 5.0 for that machine.[5]
Is a 1.25 mm foam cannon orifice size 3.5?
MTM Hydro labels the 1.25 mm orifice installed in its PF22.2 as size 3.5. Active says to use orifices of 1.25 mm or larger on the Active 2.0, because a smaller one can cause excessive current draw that may damage the motor. See foam cannon orifices.[1][5]