Overview

The C&D CD2037 Sure Seal Coupler is a must-have tool for HVAC work. It connects to access fittings quickly and stops refrigerant from escaping.

Here's how it works:

• Attach it to an access fitting — it opens and presses down the valve core on its own.

• Pull it off — it traps the leftover refrigerant inside the hose.

• Worn out parts? Swap them with the parts kit. No need to buy a new one.

The seals work with today's refrigerants, so you get reliable service for years.

Why It Matters

Refrigerant loss costs money. It also harms the planet and can break the rules set by regulators.

This coupler solves all three problems:

• Saves time — the valve core opens by itself.

• Saves refrigerant — none escapes when you disconnect.

• Protects the planet — fewer harmful gases reach the air.

What's Included

• 1 × C&D CD2037 1/4F x 3/8M Flare Sure Seal Coupler

Key Specs at a Glance

• Inlet: 1/4″ female flare

• Outlet: 3/8″ male flare

• Type: Retaining coupler with auto valve depressor

• Mounting: Fits at the hose end (stays in place)

• Service: Parts kit available for repairs

Features & Benefits

• 1/4″ female × 3/8″ male flare: Fits a wide range of hoses and access fittings.

• Auto valve core depression: Opens the valve the moment you connect. No extra steps.

• Traps refrigerant: Holds the gas inside the hose when you pull off. Less waste. Less pollution.

• Works with new refrigerants: The seals match today's blends. No leaks.

• Built to last: Stays on the hose for the long haul. Swap the inside bits with a parts kit when needed.

Where You'll Use It

• Charging and recovery: Move refrigerant in and out of systems with no spills.

• Diagnostics: Hook up your gauges fast for pressure checks.

• Routine servicing: Connect and disconnect all day without losing gas.

• Meeting regulations: Keep emissions low and stay compliant.

Tradie Pro Tip

Before you connect, wipe the coupler clean. Check the seals for wear now and then. A 10-second check saves you a leak — and a costly bottle of refrigerant.

Pair With

• C&D CD9611 Forged Brass Flare Access Tee: Adds an extra port on your flare line. Run more gauges at once.

• C&D CD2035 1/4F x 1/4M Flare Sure Seal Coupler: Same great coupler, but in a 1/4″ to 1/4″ size.

• Hilmor Quick-Engage Flare and Swage Kit: Make clean, leak-free flares on copper tube. Fast and easy.

The Bottom Line

The C&D CD2037 Sure Seal Coupler does three things well: it saves time, saves refrigerant, and lasts for years.

Add one to your kit today. You'll feel the difference on your very next job.