McKillans High Pressure Washer Gauge 3/8" Quick-Connect — Stainless Steel, 0–6000 PSI, Glycerin-Filled

The McKillans High Pressure Washer Gauge is a ready-to-use, glycerin-filled pressure gauge with a 3/8" automatic quick-connect that accurately measures up to 6000 PSI for pressure washer systems.

Keep real-time tabs on your power washer’s output with a tool designed specifically for high-pressure cleaning applications. This stainless-steel gauge installs in seconds with a push-to-connect 3/8" fitting, displays both PSI and MPa on a high-contrast dial, and uses glycerin damping to reduce needle bounce for reliable readings under load. It’s sold as a single, pre-assembled unit and includes a one-year residential warranty.

How does this gauge attach to my pressure washer?

The gauge is fitted with an automatic 3/8" push-to-connect quick connect coupler, so you can attach or remove it with one hand without tools. It’s made for pressure washer quick-connect systems and is not compatible with standard garden hose threads.

• Pre-installed 3/8" automatic quick connect coupler for tool-free attachment
• One-handed push-to-connect operation for fast swapping
• Not compatible with garden hose fittings—designed for pressure washer systems

What pressure range and accuracy can I expect?

The dial reads both PSI and MPa with a maximum scale of 6000 PSI, suitable for most commercial and consumer pressure washers. The gauge is rated at ±2.5% accuracy with a published error margin of approximately ±145 PSI, so use it for system checks and adjustments rather than precision laboratory measurements.

• Scale range: 0–6000 PSI to cover low and very high pressure settings
• Accuracy: ±2.5% for routine monitoring and troubleshooting
• Specified error margin: ±145 PSI—good for operational verification

Why choose glycerin filling and stainless steel construction?

Glycerin dampens the needle so readings remain steady even when the pump pulses or the water flow fluctuates. The body and connectors are machined from 304 stainless steel, resisting rust and corrosion in wet environments for longer service life.

• Glycerin-filled movement reduces vibration and erratic needle movement
• 304 stainless steel body and fittings for corrosion resistance
• Durable construction suited to frequent outdoor use

What comes in the box and what warranty is included?

You receive one fully assembled McKillans pressure washer gauge, ready to connect to 3/8" quick-connect systems. The product is backed by a one-year residential warranty to cover manufacturing defects under normal use.

• Included: 1 x McKillans High Pressure Washer Gauge, pre-assembled
• Ready to install—no adapters or extra parts required for compatible systems
• 1-year residential warranty from McKillans for added confidence

Who is this for? The McKillans High Pressure Washer Gauge is ideal for homeowners, professional cleaners, and maintenance technicians who need a rugged, easy-to-read pressure indicator for pressure washer systems that use 3/8" quick-connect fittings. If you require tool-free installation, clear dual-unit readouts, and a corrosion-resistant gauge that handles up to 6000 PSI for routine diagnostics and pressure tuning, this gauge is built for that purpose. Avoid using it with garden hoses or non-compatible fittings; consult your pressure washer’s specifications before attaching.