3/8-Inch OD (tubing) x 1/4-Inch MPT (thread) Quick Connect elbow fitting, package of 2

Malida 1/4" Thread Male to 3/8" Push Fit Tube Quick Connect for RO Reverse Osmosis (Pack of 4)

Malida 3/8"x3/8" Tube Ball Valve Quick Connect Shut Off for RO Water Reverse Osmosis Set of 2

Upgrade RO Reverse Osmosis with 58 Minerals inline filter / Re-Mineralization

iSpring FA15 10-in inline 2-Layer Alkaline Replacement Filter Cartridge with Calcite & Mineral balls

Universal Alkaline (raise pH level up to 8.5-9.5), ORP and Tourmaline (3-in-1) inline filter, 2"x10"