The Pentair TR140 Sand Filter Lateral (154540Z) is the OEM replacement lateral for the TR140C sand filter system. Sand filter laterals form the spoke-like distribution assembly at the base of the filter tank. Each lateral is slotted to allow filtered water to pass through while retaining filter sand within the tank. A cracked or broken lateral allows sand to bypass the filtration media and enter the pool return lines — the most common cause of sand appearing in the pool. Replacing a damaged lateral with this exact OEM part restores the integrity of the lateral assembly and prevents media loss. Pro Tip When you have sand returning to the pool and open the tank to inspect, check every lateral in the assembly — not just the visibly damaged one. Laterals degrade at similar rates, and replacing a single broken lateral while leaving aged, brittle neighbors in place often leads to a repeat service call within the same season. While the tank is open and the sand is removed, it is also a practical time to inspect the standpipe O-ring and the multiport valve gasket for wear.
