Mastercool 57261-MNB1-E — R448A/R449A Class 1.0 80mm 150cm End Valves

2-Way Ball Valve Manifold for R448A/R449A — Class 1.0 Precision 80mm Gauges with 150cm Hoses and End Ball Valves

Mastercool is the leading manufacturer of professional-quality A/C manifold gauge sets. The 57261-MNB1-E is a premium manifold featuring precision-machined ball valves, large Class 1.0 precision 80mm colour-coordinated gauges for R448A and R449A next-generation low-GWP refrigerants, and includes three 150cm nylon barrier hoses with manual ball valves at the hose ends for maximum control and reach. Full 3/8" bore through the block increases flow considerably for faster charging and recovery. Supplied in a plastic carrying case for workshop and mobile service operations.

Ultimate Premium Features

This manifold combines FOUR premium features for next-generation refrigerants:

• Class 1.0 Precision Gauges: Highest accuracy available
• 80mm Gauges: Largest standard size for easiest reading
• 150cm Hoses: Extended reach for larger installations
• End Ball Valves: Maximum control at connection points
• Professional Configuration: Complete solution for the most demanding low-GWP refrigerant applications

Key Features

• Class 1.0 Precision Gauges: Higher accuracy than standard 1.6 class gauges
• 80mm Gauges: Large size for easier reading from a distance
• 150cm Hoses: Extended reach for larger installations
• Ball Valves at Hose Ends: Additional control with ball valves at both manifold and hose ends
• Ball Valve Design: Rotates 90° between two PTFE washers
• Quarter-Turn Operation: Opens and closes quickly with minimal effort
• Visual Valve Position: Vertical = Open, Horizontal = Closed
• Full 3/8" Bore: Increases flow for faster charging and recovery
• Colour-Coordinated: Easy refrigerant recognition
• R448A/R449A Compatible: Designed for next-generation low-GWP refrigerants
• Plastic Carrying Case: Organised storage and transport (58102-PBR)
• Professional Quality: Built to last with finest materials
• Precision Machined: Highest quality standards

Technical Specifications

• Model: 57261-MNB1-E
• Type: 2-way ball valve manifold with Class 1.0 precision gauges and end ball valves
• Gauge Size: 80mm (larger than standard 63mm)
• Gauge Class: 1.0 (higher precision than standard 1.6 class)
• Gauge Type: Class 1.0 (R448A, R449A)
• Bore Size: 3/8" full bore through block
• Valve Type: Ball valves with PTFE washers at manifold and hose ends
• Hoses: 3 × 150cm nylon barrier GY5 with ball valves at ends
• Manifold Fittings: 2 × 1/4" SAE, central tee 1/4" SAE with branch 3/8"
• Compatible Refrigerants: R448A, R449A
• Carrying Case: 58102-PBR plastic case included
• Barcode: 700376104059
• SKU: 57261-MNB1-E
• HS Code: 90262080

Applications

• R448A refrigeration systems
• R449A commercial refrigeration
• HVAC/R installation and maintenance
• Applications requiring Class 1.0 precision
• Applications requiring maximum control
• Larger installations requiring extended reach
• Commercial applications
• Industrial installations
• Workshop and mobile service operations
• Critical applications where precision and control matter
• Next-generation low-GWP refrigerant systems

Class 1.0 vs Class 1.6 Gauges

Class 1.0 (This Model):

• Higher precision and accuracy
• Tighter tolerance specifications
• Professional-grade accuracy
• Ideal for critical applications
• Premium professional feature

Class 1.6 (Standard):

• Standard professional accuracy
• Excellent for most applications

End Ball Valve Advantage

The "-E" suffix indicates ball valves at the hose ends, providing superior control:

• Maximum Control: Ball valves at both manifold and hose ends
• Precise Flow Management: Control refrigerant flow at connection point
• Reduced Refrigerant Loss: Close valves before disconnecting
• Professional Standard: Premium feature for demanding applications
• Enhanced Safety: Additional control points for safer operation
• Flexibility: Isolate individual hoses as needed

R448A and R449A Refrigerants

This manifold is specifically designed for next-generation low-GWP refrigerants:

• R448A: Low-GWP replacement for R404A and R507A
• R449A: Low-GWP replacement for R404A and R507A
• Environmental Benefits: Significantly lower global warming potential
• Future-Ready: Compliant with environmental regulations
• Professional Standard: Essential for modern refrigeration systems

Optional Accessories

3-Valve Conversion:

• 90530 — Optional 90° swivel ball valve for 3/8" vacuum (converts 2-valve into 3-valve full control 4-way manifold)

Optional Modifications (add suffix to part number):

• -G: Shock-resistant gauge protectors
• -T: Assembled with PTFE gaskets

Replacement Parts

• 85102-R-KIT — O-ring repair kit for 2-3-way ball valve manifold
• 98225 — Ball valve repair kit
• 91553-EE — Replacement gauge protector set (Red/Blue) 3 1/8"

Why Choose Mastercool Manifolds?

• Professional Quality: Constructed of finest materials
• Precision Machined: Highest quality standards
• Built to Last: Every manifold built for long service life
• Ball Valve Design: Superior performance under pressure
• Full 3/8" Bore: Faster charging and recovery
• Colour-Coordinated Gauges: Easy refrigerant recognition
• Class 1.0 Precision: Highest accuracy for critical applications
• Large 80mm Gauges: Easier to read from a distance
• Extended Reach: 150cm hoses for larger installations
• End Ball Valves: Maximum control and flexibility
• Nylon Barrier Hoses: Low permeability, professional standard
• Visual Valve Position: Know at a glance if valves are open or closed
• Future-Ready: Designed for next-generation refrigerants

Perfect For

• HVAC/R service technicians
• Refrigeration technicians
• Commercial refrigeration specialists
• R448A system service
• R449A system service
• Applications requiring Class 1.0 precision
• Applications requiring maximum control
• Larger installations
• Commercial applications
• Industrial installations
• Workshop environments
• Mobile service operations
• Technicians preferring larger gauges
• Installations requiring extended reach
• Critical applications where precision and control matter most
• Next-generation low-GWP refrigerant systems

Maintenance

• Regular Inspection: Check gauges, valves (including end valves), and hoses for wear
• Gauge Calibration: Verify accuracy periodically (especially important for Class 1.0 gauges)
• Valve Operation: Ensure all ball valves operate smoothly
• Hose Condition: Inspect for damage or leaks
• O-Ring Replacement: Use 85102-R-KIT when needed
• Ball Valve Service: Use 98225 repair kit when required
• Storage: Store in carrying case when not in use

Professional Quality: Mastercool manifold gauge sets are built to professional standards with precision machining and finest materials for reliable, long-lasting performance. The 57261-MNB1-E 2-way ball valve manifold features large Class 1.0 precision 80mm colour-coordinated gauges for R448A/R449A next-generation low-GWP refrigerants, full 3/8" bore for faster charging and recovery, and includes three 150cm nylon barrier hoses with manual ball valves at the hose ends in a plastic carrying case for professional HVAC/R service operations requiring maximum precision, larger gauges, extended reach, and maximum control for environmentally-friendly refrigerant systems.