HVAC Shop Blog

Reading a manifold gauge correctly is a foundational skill that separates confident diagnosis from guesswork. This step-by-step guide covers gauge layout and scales, superheat and subcooling calculation, and how to interpret abnormal pressure readings to diagnose what's actually happening in the system.

A manifold gauge set is the tool you reach for on every job. This guide compares Mastercool's digital and analog manifold options across 2-valve and 4-valve configurations, covering R32 compatibility, superheat and subcooling calculation, and which type suits your typical work and conditions best.

The Testo 558s is more than a premium digital manifold with a big screen. This guide explains the practical features that matter on real Australian HVAC jobs, including the colour graphic display, guided measurement menus, multi-refrigerant support, Bluetooth probe integration, app-based reporting, and the field-ready design that makes the 558s a strong professional tool.

Comparing the Testo 558s vs 570s comes down to how you work in the field. This guide explains the real difference between Testo’s premium workflow-focused 558s and the data-heavy 570s, so Australian HVAC techs can choose the right smart manifold for commercial diagnostics, logging, reporting, and day-to-day service work.

Comparing the Testo 558s vs 557s comes down to workflow, job type, and how much on-device help you want. This guide explains where the 557s still makes strong sense for residential and light commercial work, where the 558s steps ahead for commercial diagnostics, and how to choose the right Testo smart manifold for Australian HVAC jobs.

Tired of mismatched hoses, missing clamps, and messy readings on site? This guide breaks down the testo gauge accessories Aussie techs rely on most, including Testo clamp probes, filling hoses, the Testo Smart App, and 560i scale integration—so you can work faster, charge with confidence, and finish with clean job reports.