PMA-R1 (Serial number starting with 24 or less Twilight [Except TS120/240], Legend, Legacy, Therapool Outer Locking Filter)
PMA-R3 (Serial number starting with 24 or lower Healthy Living, Clarity, and TS120/240 Outer Locking Filter)
![PMA-R1 (Serial number starting with 24 or less Twilight [Except TS120/240], Legend, Legacy, Therapool Outer Locking Filter)](http://store.eastcoastspas.com/cdn/shop/files/R1filter_d73a7a3d-3dff-4c50-b9c8-ad73efec181d_{width}x.jpg?v=1702493935)
![PMA-R1 (Serial number starting with 24 or less Twilight [Except TS120/240], Legend, Legacy, Therapool Outer Locking Filter)](http://store.eastcoastspas.com/cdn/shop/files/R1filter_d73a7a3d-3dff-4c50-b9c8-ad73efec181d_580x.jpg?v=1702493935)
