SKU O-RING-SET
The O-ring-set contains 3 pieces of 3.5 in. O.D. standard industry size O-ring use to prevent leaks when customer need to change 3 pre-filter of 10 in. standard under sink reverse osmosis system. Recommend to change all O-Rings once open the housing. Lubricate with clean lubricant and place in grooves below thread to prevent water leaks.