Model 400 Feeder - # 5 Inner Lid

A chemical feeder is only as reliable as its seal, and this genuine #5 inner lid is a key sealing component of the Model 400 chemical feeder. Positioned within the feeder's lid assembly, the inner lid helps maintain a proper seal and supports the controlled, contained operation that keeps chemical dosing accurate over the long term. When it seats correctly, the feeder holds its enclosure the way it was engineered to.

Why the inner lid matters

Chemical feeders depend on properly sealed enclosures to meter chemicals accurately and contain the solution they handle. A cracked, warped, or worn inner lid can compromise that seal, leading to leaks or inconsistent dosing that quietly undermines treatment results. Replacing it with the correct factory part restores dependable performance and helps prevent the kind of slow seepage that can corrode surrounding equipment or turn into a recurring maintenance problem. Catching a tired lid early is far easier than tracking down the damage a persistent leak can cause.

• Genuine Model 400 feeder #5 inner lid
• Integral part of the lid assembly
• Helps maintain a proper feeder seal
• Direct-fit replacement for worn or damaged lids
• About 0.45 lbs each
• Smart spare for chemical-feed maintenance

Because feeder components live in constant contact with treatment chemicals, the inner lid is a sensible part to keep on hand for scheduled maintenance or an unexpected repair. Choosing the genuine Model 400 part ensures it indexes correctly with the cover, O-ring, and other lid-assembly pieces, so the whole top end seals as designed rather than fighting a mismatched fit. That correct interaction between parts is what keeps the assembly leak-tight under continuous duty.

For operators running chlorination or other chemical-feed processes, this inner lid helps keep the system sealed, accurate, and running with minimal interruption. Swapping it at the first sign of warping or cracking is a quick job that protects both dosing accuracy and the equipment around the feeder, supporting consistent treatment week after week and helping you avoid surprise downtime in the middle of a service route. Pairing a new inner lid with a fresh O-ring during the same visit is a smart way to renew the entire sealing surface at once.