Mastercool 42017-10 — Screw-Type Valve Core Depressor (Pack of 10)

Professional screw-type valve core depressors for 1/4" SAE service ports. Pack of 10 brass replacement depressors for manifold gauge sets and charging hoses. Screw-in design provides secure, leak-free connection whilst depressing valve core for refrigerant flow. Essential replacement parts for maintaining manifold gauge sets and service hoses.

Key Features:

• Screw-Type Design – Secure, leak-free connection
• 1/4" SAE Fitting – Standard size for most HVAC/R applications
• Pack of 10 – Multiple depressors for ongoing service needs
• Brass Construction – Durable, corrosion-resistant material
• Depresses Valve Core – Allows refrigerant flow when connected
• Universal Compatibility – Works with standard manifold hoses
• Professional Quality – Built for daily commercial use

Specifications:

• Model: 42017-10
• Type: Screw-type valve core depressor
• Size: 1/4" SAE
• Material: Brass
• Quantity: 10 pieces per pack
• Application: Manifold gauge sets and charging hoses
• Weight: 10 kg (shipping weight)
• SKU: 42017-10
• Barcode: 700376117875
• HS Code: 84189910

Use With Manifold Sets:

• 33103-M — 2-Way Brass Manifold 63mm 5 Refrigerant Scales
• 33636-M — Brass Manifold Set 63mm 5 Scales with 3 x 90cm Hoses
• 33103-MR — 2-Way Brass Manifold 63mm 4 Refrigerant Scales

Related Valve Core Products:

• 90377-20 — Standard Valve Cores 1/4" SAE (Pack of 20)
• 42044-10 — Valve Core Depressors (Pack of 10)

Applications:

• Manifold gauge set hose connections
• Charging hose service port connections
• Refrigerant recovery operations
• System charging and service
• Professional HVAC/R service work
• Replacement for worn or damaged depressors

What is a Valve Core Depressor?

A valve core depressor is a small pin or plunger inside a service hose fitting that pushes down on the Schrader valve core when the hose is connected to a service port. This opens the valve, allowing refrigerant to flow between the system and the manifold gauge set or charging equipment. The screw-type design ensures the depressor stays securely in place and creates a leak-free seal.

Why Replace Valve Core Depressors?

• Wear and Tear – Depressors can become worn or damaged with repeated use
• Leaks – Worn depressors can cause refrigerant leaks at connections
• Poor Sealing – Damaged depressors don't seal properly against valve cores
• Preventive Maintenance – Replace periodically to prevent service issues
• Lost or Missing – Keep spares available for replacement

Benefits:

• Pack of 10 – Multiple depressors for ongoing service needs
• Brass Construction – Durable, long-lasting material
• Screw-Type Design – Secure, leak-free connection
• Universal Compatibility – Works with standard 1/4" SAE hoses
• Cost-Effective – Bulk pack saves money vs individual depressors
• Professional Quality – Built to Mastercool standards
• Always Available – Keep spares in service van or workshop

How to Replace:

1. Disconnect hose from service port
2. Unscrew old depressor from hose fitting
3. Inspect fitting threads for damage
4. Screw new depressor into hose fitting
5. Tighten securely (do not over-tighten)
6. Test connection for leaks
7. Verify depressor properly depresses valve core

Screw-Type vs Push-In Depressors:

Screw-Type (42017-10):

• Secure, threaded connection
• Less likely to fall out
• Better sealing
• Preferred for professional use

Push-In Type:

• Quick installation
• Can fall out if not secured
• May not seal as well
• More prone to leaks

When to Replace Valve Core Depressors:

• Visible Wear – Depressor tip shows wear or damage
• Leaks Detected – Refrigerant leaking at hose connection
• Poor Connection – Hose doesn't seal properly to service port
• Missing Depressor – Depressor has fallen out or been lost
• Preventive Replacement – Replace annually as preventive maintenance

Maintenance Tips:

• Inspect depressors regularly for wear
• Replace if tip shows damage or deformation
• Keep spare depressors in service van
• Tighten securely but don't over-tighten
• Check for leaks after installation
• Store spare depressors in clean, dry location

Professional Quality: Mastercool valve core depressors are manufactured to professional standards for reliable, leak-free connections in demanding HVAC/R service environments. Essential replacement parts for maintaining manifold gauge sets and charging hoses.