Saratoga Spas Filter Thread Adapter - Fine (BLUE)
Product Description
BLUE adapter in photo above. Fine thread (1 1/2" NPT) If you have one then you know what this is...Adapter threads into tub, and allows filters with two slots on bottom to 'quick-release' off and on. Called "PAD-4" or "twist-lock" adapter. Used on filters numbered 1,3,3MB,9,9MB in photo above.
