Schrader Cores & Caps

Caps & Schrader Cores

The Schrader Cores & Caps category covers the internal valve cores and sealing caps found inside HVAC/R service ports. These small components play a critical role in keeping systems leak-free, maintaining refrigerant charge and ensuring accurate diagnostic readings.

Here you’ll find standard and high-pressure Schrader cores, OEM core replacements, cap kits with sealing gaskets, brass and plastic service caps, tamper-resistant caps, gasket assortments and core tools. These components support AC systems, heat pumps, refrigeration, mini-splits, coolers and ice machines.

• Standard & high-pressure Schrader cores for all common service ports.
• Brass & plastic sealing caps with integrated gaskets.
• Tamper-resistant & locking caps for residential and commercial units.
• Cap & gasket kits to refresh aging service ports.
• Core removal & installation tools for safe, easy valve replacement.

When selecting Schrader cores and caps, verify pressure rating, refrigerant compatibility, port size, sealing surface type and whether the caps include O-ring or gasket inserts. A fresh core and properly sealed cap can eliminate many nuisance leaks and prevent refrigerant loss.

Pro tip: If you detect oily residue around a service port, replace both the Schrader core and the service cap gasket. This simple repair prevents slow leaks and protects the system from contaminants.