Perfectfill™ Bath Drain Kit 31798-NA

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Sink into a soothing bath prepared exactly how you like it—every time—all without lifting a finger. PerfectFill technology pairs with the KOHLER Konnect® app and voice assistants for digital control over how your bathtub fills, heats, and drains, with presets for everyone in the family, giving you more time to relax and unwind. You can even draw your bath remotely for a tub that’s ready when you are—and that stays warm for as long as you want to soak. Install your PerfectFill drain with coordinating trim kit and desired bath spout (each sold separately) for the ultimate minimalist bath aesthetic.


- KOHLER Konnect® app lets you control PerfectFill drain system from anywhere and create up to ten temperature and fill-level presets
- AutoFill feature closes drain and fills bath to desired level and temperature; no monitoring necessary
- AutoDrain automatically opens drain after preset bath duration elapses; drain can also be operated via the app, voice assistant, or on/off button
- Warm Up/Cool Down function removes and adds water, maintaining your desired temperature throughout the bath; can be set to run automatically or when prompted
- Manual Bath Fill lets you run a normal bath without timer or digital drain features
- Wall-mount remote on/off button allows you to manually start/stop water or open/close drain
- No internal linkages, reducing the chance of clogs in the overflow pipe
- Ball-joint construction for easy installation
- Kit includes through-the-floor drain assembly, PerfectFill controller, drain fittings, remote on/off button, and mounting hardware
- Controller is equipped with rubber feet for locating on a countertop or shelf; can also be wall-mounted
- Requires bath spout (sold separately)
- Requires drain trim kit and two-port digital thermostatic valve or three-port digital thermostatic valve for use with handshower (sold separately)
- Add DTV+™ to control PerfectFill through the DTV+ interface; requires K-99693-P, K-99694, K-99695, and K-97999 (sold separately)


- Schedule 40 PVC with metal overflow cover
- Reinforced engineering-grade thermoplastic casing on controller
- KOHLER® finishes resist corrosion and tarnishing


- KOHLER Konnect® app pairs with Amazon Alexa and Google Home for hands-free PerfectFill functionality


- Through-the-floor

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