Pentair R171096 Rainbow™ 320 In-Line Automatic Chlorinator For 11 Large or 98 Small Bromine or Slow Dissolving Trichlor Tablets, White. Pentair Rainbow 320 Automatic In-Line Chemical Feeder holds 11 large or 98 small bromine or slow dissolving chlorine tablets and treats 6500 to 27000 gallons.

• No special venting required
• Permanent installation in return line of new or existing pools or spas
• Standard with 2" slip PVC fitting and adapters for 1-1/2"
• Unions not included
• Hold 11 large or 98 small bromine or slow-dissolving trichlor tablets
• NSF listed
• 50 PSI maximum operating pressure
• Easy tablet-level monitoring
• Treats 6500 to 27000 gallons bottom feed and 18000-70000 top feed
• Dimensions: 17-3/4"H x 5"W x 10"D