Hayward Standard CO2 System | AC004 Square Propane Tank Enclosure The Hayward AXV621D Universal A-Frame

The Hayward AXV621D Universal A-Frame Assembly Kit replaces the A-frame support structure in compatible automatic pool cleaners

Technicians replace long timing tracks when wall climbing declines or movement becomes uneven

Maintains system efficiency by reducing water loss and preserving proper flow

and reduces downtime due to part wear

Replacing the terminal bar helps restore clean

Hayward Standard CO2 System | AC004 Square Propane Tank Enclosure The Hayward AXV621D Universal A-FrameWhat This Part Is Used For The AC004 standard CO2 system is used to regulate pool pH by injecting carbon dioxide into the return line. It integrates with compatible automation or standalone control systems for chemical management. Why This Part Matters CO2 systems provide controlled pH reduction without handling liquid acid at the equipment pad. Consistent pH control protects heaters, plaster, and salt cells from scaling. Proper operation helps