Model 400 Feeder - Lid Assembly

Simplify your Model 400 chemical feeder repair with this complete lid assembly, which bundles every top-end component into a single ready-to-install unit. Instead of sourcing individual parts one at a time and hoping you identified the right culprit, you get everything needed to refresh the feeder's lid in one package, making the repair faster, cleaner, and more thorough. For a busy service tech, that one-box convenience is often worth as much as the parts themselves.

Everything in one assembly

The lid assembly includes the #01 cover, #02 cap screw, #03 spacer, #04 outer lid, #05 inner lid, and #06 lid O-ring. Together these components form the sealed top of the feeder, protecting internal parts and maintaining the proper enclosure for accurate, contained chemical metering. Because every sealing surface in the assembly is fresh, you eliminate the guesswork of trying to pinpoint which single worn part is behind a leak or inconsistent dosing, and you know each piece is matched to the others as the manufacturer intended.

• Complete Model 400 feeder lid assembly
• Includes #01 cover and #02 cap screw
• Includes #03 spacer and #04 outer lid
• Includes #05 inner lid and #06 lid O-ring
• About 1.83 lbs fully assembled
• Restores a proper seal in one convenient kit

Replacing the entire lid assembly at once is ideal when multiple top-end parts are worn, when an older feeder has seen years of chemical exposure, or when you simply want the confidence of knowing every sealing surface is new. Chemical feeders rely on a sound seal for accurate dosing and safe containment, so a full-assembly swap is a reliable way to bring an aging unit back to dependable service in a single step rather than chasing individual leaks over several visits.

For operators maintaining Model 400 feeders, this kit makes the job fast, complete, and easy to schedule into a routine maintenance plan. Stocking one as a shelf spare means a worn or damaged lid never has to take a feeder offline for long, keeping chemical treatment on track and your maintenance calendar predictable. When the time comes to install it, simply transfer the assembly to the feeder, confirm each piece is seated, and the top end is restored to like-new sealing in a single step.