Rector seal gas guard caps if you guys don't have one of these tools yet they are a life saver! : r/HVAC
5/16" UNIVERSAL KEYLESS LOCKING REFRIGERANT GAS CAP - 10 PER PACK | Surplus City Liquidators
Amazon.com: Flow Security Systems | VersaLock | Vented Locking Fuel Tank Cap | For Transfer Tanks & Above Ground Commercial Tanks | Prevents Theft & Secures Fuel Tanks | Includes Adapter | FSS 754 : Automotive
Amazon.com: Multi-Key/Locking Cap Tool - Fits All Novent Caps : Automotive
HVAC-Talk: Heating, Air & Refrigeration Discussion
HOW to remove LOCKING CAP on AC REFRIGERANT lines! - YouTube
HVAC-Talk: Heating, Air & Refrigeration Discussion
Amazon.com: Locking Gas Cap, Lock Fuel Cap Replace 05278655AB, 5278655AB Compatible with Chrysler Dodge Jeep Ram - Challenger Grand Caravan Ram 1500, Grand Cherokee Wrangler JK TJ Liberty Compass Patriot, More : Automotive
RECTORSEAL 86621 5/16" UNIVERSAL KEYLESS LOCKING REFRIGERANT GAS CAP - 10/PACK | eBay
removing GasGuard locking caps - YouTube
HVAC-Talk: Heating, Air & Refrigeration Discussion
Airstar Supply | Solutions for Today's HVAC Problems
Airstar Supply | Solutions for Today's HVAC Problems
NB Handy - GAS GUARD SOCKET TOOL W/2-CAPS
5/16" UNIVERSAL KEYLESS LOCKING REFRIGERANT GAS CAP - 2 PER PACK/W SOCKET TOOL | Surplus City Liquidators