Mastercool 0281-003C — Ball Valve 1/8" NPT-F x 1/4" FL-F

Mastercool 0281-003C — Ball Valve 1/8" NPT-F x 1/4" FL-F

Professional brass ball valve fitting with 1/8" NPT female thread on one end and 1/4" flare female connection on the other. Essential component for manifold gauge sets, recovery machines, and HVAC/R service equipment requiring reliable shut-off control.

Key Features:

• Dual Connection Types – 1/8" NPT-F x 1/4" FL-F for versatile applications
• Ball Valve Design – Quarter-turn operation for quick on/off control
• Brass Construction – Corrosion-resistant, durable material
• Professional Quality – Built to Mastercool standards
• Leak-Free Operation – Reliable sealing for refrigerant systems
• Compact Design – Space-efficient installation

Specifications:

• Model: 0281-003C
• Type: Ball valve fitting
• Connection 1: 1/8" NPT female thread
• Connection 2: 1/4" flare female (FL-F)
• Material: Brass
• Operation: Quarter-turn ball valve
• Weight: 10 kg (shipping weight)
• SKU: 0281-003C
• HS Code: 84818081

Compatible Equipment:

Recovery Machines:

• 69500 RecoveryMate — Moisture & Oil Separator System

Manifold Gauge Sets:

• 33636-EBC2 — Brass Manifold Set 80mm with Hoses & Case
• 33636-MB — Brass Manifold Set 80mm with 3 x 90cm Hoses
• 93636-E — Aluminium Manifold Set 63mm with 3 x 90cm Hoses

Applications:

• Manifold gauge set shut-off control
• Recovery machine connections
• Service equipment isolation valves
• Refrigerant line control
• HVAC/R system modifications
• Custom service equipment builds

What is a Ball Valve?

A ball valve uses a spherical ball with a hole through the centre to control flow. When the handle is turned 90 degrees (quarter-turn), the hole aligns with the flow path (open position) or blocks it (closed position). This design provides quick, reliable shut-off with minimal pressure drop when open.

Why Use Ball Valves in HVAC/R?

• Quick Operation – Quarter-turn for instant on/off control
• Reliable Sealing – Positive shut-off prevents refrigerant loss
• Low Pressure Drop – Full-bore design when open
• Durable – Fewer moving parts than other valve types
• Visual Indication – Handle position shows valve status

Connection Types Explained:

1/8" NPT-F (National Pipe Thread Female):

• Tapered thread for pipe connections
• Common on manifold bodies and equipment ports
• Requires thread sealant or PTFE tape

1/4" FL-F (Flare Female):

• 45-degree flare connection
• Standard for HVAC/R charging hoses
• Uses flare gasket for sealing

Installation:

1. Apply PTFE tape or thread sealant to NPT male fitting
2. Thread NPT connection hand-tight, then wrench-tighten
3. Install flare gasket on flare connection
4. Connect flare fitting and tighten securely
5. Test for leaks before pressurising system

Maintenance:

• Operate valve periodically to prevent seizing
• Inspect for leaks regularly
• Replace if valve becomes difficult to operate
• Keep threads clean and free from debris
• Do not over-tighten connections

Professional Quality: Mastercool ball valves are manufactured to professional standards for reliable, leak-free operation in demanding HVAC/R service environments.