Captive Purity 3 Gallon Drinking Water Kit for RO and RO/DI Systems

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Captive Purity

Captive Purity Drinking water kit with 3 gallon storage tank for RO and RO/DI systems

The Captive Purity Drinking water kit allows you to easily convert your RO or RO/DI system in to an under-the-sink drinking water system. Now you can use the RO or RO/DI system for both your aquarium and for drinking water.

All necessary parts are included for a standard installation; including a 3-gallon pressurized tank, a manual tank shut-off valve, a water conserving auto shut-off valve, a long reach faucet, check valve, a feed valve, a drain saddle, a tee for your aquarium, a ball valve and all necessary tubing and fittings


  • Space-Saving 3 gallon pressurized tank
  • Easy under-the-sink installation
  • Low maintenance
  • Auto shut-off for water conservation
  • Post-carbon filter available separately for great tasting water
  • Extra outlet and valve for your aquarium
  • No electricity required
  • Compatible for both RO and RO/DI systems

Driking Kit Diagram

Manufacturer Info

Captive Purity manufactures water filtration and water testing supplies for marine and reef aquaria. The brand is best known for their high-quality line of reverse osmosis filter systems and accessories. Captive Purity also produces refractometers for testing salinity, portable pen-sized meters for testing pH as well as replacement filter media for their RO and RO/DI filter systems.

jedimasterben from Okeechobee, FL UNITED STATES


Experience Level: Expert

It's pretty great

Very easy install, comes with almost every part necessary (though not complete if you have PVC drains, I had to get a few small bits and pieces to convert to that, and does its job well.

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Experience Level: Beginner

Buy it!

This is a must-have item if you own an RO/DI system, as it allows you to split the line between your filtration system's carbon block and de-ionization canisters to provide great-tasting, high-quality drinking water to a sink-top tap (included). I highly recommend this great product.

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