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Zoro Select commercial pressure gauge with 3 1/2 inch white dial black ABS case 1/4 inch NPT bottom connection

Zoro Select

Zoro Select 4FLX6 Commercial Pressure Gauge 0 to 30 psi 3 1/2 in Dial 1/4 in pressure washer part

SKU CH-3KPZ-RY290

Measures pressure up to 30 psi with a 3 1/2 inch dial and 1/4 inch NPT connection

  • Accurate readings with ±3-2-3% precision
  • Clear 3 1/2 in dial for easy monitoring
  • Durable ABS plastic case resists damage
  • Standard 1/4 in NPT male connection fits many units
  • New commercial gauge ready for pressure washer use

Commercial Pressure Gauge 0 to 30 psi

The Zoro Select 4FLX6 is a commercial pressure gauge built for pressure washer systems. It measures from zero to 30 psi with a nominal dial size of three and a half inches. The gauge uses a 1/4 inch male NPT bottom connection for direct installation. It suits operators who need a straightforward replacement or upgrade for compatible equipment. It does not suit buyers who need a wider pressure range or a different connection type.

Thermals noise and power draw

This mechanical gauge operates without electrical power so it generates no heat and produces no noise. The ABS plastic case and acrylic lens contain no active cooling or electronic components. Accuracy is rated at plus or minus three two three percent across the scale. There is no dampening feature and no vibration resistance specified. The product carries a California Proposition 65 warning for chemicals known to cause cancer and reproductive harm.

Accessories and software impact

The gauge is sold as a standalone component with no bundled accessories, software or fillable fluid option. The black ABS case and white dial arrive ready to mount. No additional fittings, seals or calibration tools are included in the package. Orders of seventy five dollars or more qualify for free shipping direct from Zoro. Installation depends entirely on the existing plumbing and thread sealant the user provides.

How it compares

Measured against everything we stock in Pressure Washer Guns & Spare Parts, at today’s prices. Recalculated every night.

Price $6.99
Cheaper than about 94% of the 141 comparable items (median $26.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

How do I install the 1/4 in NPT male connection without cross-threading?

Wrap PTFE tape clockwise on the male threads, hand-tighten the gauge into the pressure washer port, then snug with a wrench on the ABS case flats — avoid over-torquing the plastic case.

What maintenance will the acrylic lens and dry gauge need over time?

Wipe the white dial and acrylic lens with a damp cloth; the dry, non-fillable design has no fluid to replace, but replace the gauge if the +/-3-2-3% accuracy drifts or the lens cracks.

At what pressure does the 0 to 30 psi range limit safe reading during sustained use?

The gauge reads up to 30 psi; sustained pressure at or above this limit can permanently deform the bourdon tube and void the +/-3-2-3% accuracy spec.

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