Pentair Quad CNC Plus 2" x 2 1 2" Valve Union Adapter Kit (270100Z) airblowers a tune up kit can restore a tune up kit can restore function when the cleaner body is still in good condition A charger setup like this is useful because it helps ensure the cleaner can be powered back up correctly without forcing the user to piece together separate charging components Union adapters are important because they create serviceable plumbing connections that can be opened for maintenance without cutting hard pipe This 2 inch x 2 1 2 inch valve union adapter kit is designed for compatible Pentair Quad and CNC Plus filter applications