Use Pentair HC-3315/3330/3340 Automatic Feeder Lid Assembly when the job calls for a dedicated Pentair replacement part tied to feeder operation, flow control, and serviceable chemical systems. The specification in the title, including part number R172385D, helps confirm the exact item before installation and reduces the chance of ordering a similar-looking but incorrect part. Chemical-system repairs should include a check of threads, flow direction, residue buildup, brittle fittings, and nearby seals. Designed for replacement rather than guesswork Helps reduce downtime during repairs Pairs with model and part-number verification For best results, inspect the surrounding parts during installation and replace any worn seals, hardware, or mating components that could affect performance after the repair.