Place your order online for curbside pickup at our Festus, MO location. Shipping is NOT available at this time.


Your Cart is Empty

Rainbow 300 Offline Chlorinator #R171016

The Pentair Rainbow 300 is a completely enclosed off line system ideal for existing pools where permanent installation into the return line is impractical. It top loads, requires no venting and lets you adjust the optimum chlorine/bromine feed rate for your pool. It operates on pressure side of pump.


  • Completely enclosed system- no sperical venting required
  • No escaping gas
  • 50 PSI maximum operating pressure
  • Retrofits into existing pools/spas
  • Uses 1/4 in. feeder hoses, control valves, and fittings.


  • Holds 11 large or 98 small tablets
  • Treats 12,000 to 48,000 gallons
  • Dimensions: 21 in. (H) x 7 in. (W) x 12 in. (D)
  • Service Clearance for Lid Removal: 22-1/4 in.