The Mastercool 90328 is a drip-free refrigerant control valve with 1/4″ FFL x 1/4″ MFL threads. It’s built for licensed HVAC & refrigeration techs who want clean connections on charged systems—no mess, no dramas, just a tidy seal every time.
Key Features & Trade Benefits
- Ideal for charged systems → Attach gauges or hoses without dumping refrigerant or oil—safer for you and the system.
- Eliminates spray on connect → Helps prevent refrigerant, oil or dye from spurting when you crack the fitting. Fewer clean-ups, fewer call-backs.
- Brass body + swivel FFL → Durable brass with a 1/4″ FFL swivel coupler for quick, positive sealing on service hoses.
- Standard flare threads → 1/4″ FFL x 1/4″ MFL suits most manifold hoses and tools in the van—plug-and-play.
Why This Control Valve Matters
Real-world: you’re up on a roof in 40-degree heat, client breathing down your neck, and you need to slip a hose onto a live port. With the 90328 you spin-up the swivel, crack the valve, and there’s no misty spray—job stays clean and you’re back on the gauges in seconds. That’s a bloody good result and a safer workflow for everyone. For hose options that pair nicely, see Hoses & Couplings.
Pro Tip
Doing R32 jobs? The valve is a mechanical fitting, but your hoses still need to be R32-rated and in good nick—follow Australian refrigerant handling rules and keep emissions to a minimum.
Compatibility & System Info
- Threading: 1/4″ FFL (female flare swivel) x 1/4″ MFL (male flare).
- Use case: Hose/gauge connection on charged systems to reduce spray at connection.
- Other sizes available: 5/16″ FFL x 5/16″ MFL (90328-5/16) and 5/16″ FFL x 1/4″ MFL (90329). Check your manifold/hose sizes.
- Best practice: Use with sound hoses and proper PPE; follow Australian regulations for handling regulated refrigerants.
Local SEO Reference
Popular with service crews across Sydney and Brisbane for clean connects on roof-top units and coolrooms—she’ll be right when the fittings are tight.
What’s Included
- 1 × Mastercool 90328 control valve (1/4″ FFL x 1/4″ MFL)
Specifications
| Spec | Detail |
|---|---|
| Model | 90328 |
| Connections | 1/4″ FFL (swivel) × 1/4″ MFL |
| Body Material | Brass |
| Application | Charged-system hose/gauge connection, reduces spray at connect |
| Other Options | 90328-5/16 (5/16″×5/16″), 90329 (5/16″×1/4″) |
| Brand | Mastercool |
Specs per Mastercool product documentation.
Warranty & Returns
Backed by manufacturer warranty. HVAC Shop accepts returns on unused items in original packaging—see our Shipping & Returns policy for full details.
FAQs
- Does the 90328 actually stop refrigerant spray?
- It’s designed for use on charged systems and helps eliminate refrigerant, oil or dye from spraying during connections. Keep your hoses and seals in good condition for best results.
- FFL vs MFL—what’s the difference?
- FFL is a female flare with a swivel nut for easy tightening on hose ends; MFL is a male flare outlet to the mating port. This valve is 1/4″ FFL × 1/4″ MFL, the most common size on legacy manifolds/hoses.
- Is this suitable for R32 work?
- The valve is a mechanical flare fitting—use with R32-rated hoses and follow Australian refrigerant-handling requirements (licensing and controls).
- Is it a core remover?
- No—this is a control valve for clean connections. For removing Schrader cores to improve flow, grab a Mastercool Core Remover/Installer.
Related Products
- Mastercool 90430 Swivel Ball Valve (1/4″×1/4″) — Handy when you want fast isolation at the hose end without cracking fittings.
- Mastercool 90329 Control Valve (5/16″ FFL × 1/4″ MFL) — Use this size when you’re on newer R410A/R32 hoses but still need a 1/4″ outlet.
- R32-Rated Hoses — Pair with the valve to keep connections compliant and tidy.
For safe handling of regulated refrigerants in Australia (licensing and work practices), see the Australian Government guidance for technicians.