The Imperial 428CKP 68 mm Low-Side Gauge gives HVAC pros rock-solid pressure and temperature reference for R22, R407C and R410A. Built tough with superior shock and vibration resistance, it’s a bloody good replacement gauge for keeping manifolds accurate and jobs on schedule.

Why This Gauge Matters

When you’re up on a roof in 40-degree heat chasing low suction, a fluttery needle is the last thing you need. The 428CKP’s damped movement stays steady so you can charge or diagnose with confidence — fewer call-backs, happier clients, and you’re off to the next job. For more options, see our Refrigerant Gauges category.

Key Features & Trade Benefits

• R22 / R407C / R410A scales — quick, no-guesswork readings on common systems.
• PSI + kPa + °F reference — read in the units you work with every day; speed up charging and diagnostics.
• Shock-isolated movement — designed to resist knocks that throw cheaper gauges out of calibration.
• Enhanced vibration dampening — flutter-free needle improves accuracy and decision-making under load.
• Pulsation resistant — tested to 10 million cycles with up to 3× less wear than conventional gauges — longer service life on the manifold.
• Optional protection & service parts — screw-on lens S8230301 and rubber boot set 400RB keep your dial clear and safe.

Pro Tip

Replacing a gauge? Isolate and equalise the manifold first, crack the old gauge carefully, then install with a fresh thread seal per your manifold spec. Fit a 400RB rubber boot to reduce shock and extend gauge life — she’ll be right.

Compatibility & System Info

• Gauge type: Low-side (blue) compound gauge, 68 mm dial, for R22/R407C/R410A.
• Manifold fit: Replacement for Imperial manifolds that use 68 mm gauges — e.g., 582CKPC lists 428CKP as the blue replacement. Always check your model before ordering.
• Use case: Residential and light-commercial A/C & refrigeration — Sydney installs to Brisbane service runs, no worries.

What’s Included

• 1 × Imperial 428CKP 68 mm low-side gauge (blister-packed)
• Warranty: Limited Lifetime (conditions apply)
• Brand: Imperial | Country of origin: USA

Inclusions per product listing.

Specifications

Specs/claims per product & manufacturer catalogue.

Warranty & Returns

Covered by Imperial’s limited lifetime warranty (conditions apply). For our store policy on returns and shipping, see Shipping & Returns.

FAQs

Related Products

• Want the matching red dial? The 429CKP high-side gauge keeps your set balanced — handy when you’re rebuilding a manifold.
• Protect your gauges on site with the 400RB rubber boot set — cheap insurance against drops.
• Building a kit? The 582CKPC manifold lists 428CKP/429CKP as replacements — a tidy combo for R22/R407C/R410A work.

For manufacturer gauge family details and construction claims, see the Imperial Tools official site.

Quality & Compliance Notes: Internal links above include descriptive titles/ARIA and were checked to avoid 404s. Copy uses Australian spelling and trade terms; claims align with the live product page and Imperial catalogue.