By Pentair Pool Products



Model # HC3340

Alternate Part #'s 42-196-2006, R171240

Product Description

High capacity for 1 in. hard plumbing installations. Holds up to 40 lbs. of tablets. Treats up to 61,000 gallons with Bromine and up to 332,000 gallons with Trichlor. Approx. dimensions 22" tall x 6" wide.


  • Rainbow HC-3340 commercial and high capacity automatic chlorine/bromine feeder
  • Holds 40 pounds of tablets and treats up to 61,000 gallons with bromine and up to 332,000 gallons with trichlor
  • High capacity for 1-inch hard plumbing installations
  • Completely enclosed system, no special venting required
  • Measures 50-3/4-inch length by 7-3/4-inch height by 7-3/4-inch width

Product Specifications

Large Tab Capacity:
80 Tablets
Small Tablet Capacity:
40 Lbs.
Treatment Capacity:
Up to 332,000 gal.

?     Asked on 3/10/2007by Guest

Is there a feedback mechanism that tells the unit the chlorine balance in the pool? Is this a way for me to automate addition of clorine to keep it always at the correct level? Or, just another place to put the tab aside from the the drain basket?

A  Answered on 3/10/2007 by InyoPools Product Specialist Patrick P.

There is a dial on this unit which has a setting from 1-10 If you set the dial on 1 it will be letting the least amount of chlorine to the pool and if you have it set at 10 this would send the most amount of chlorine to the pool. So you can automate the feed of chlorine to the pool but you will still need to manually test your water. We do not recommend placing tablets in the skimmer basket because this high concentration of chlorine goes directly back to your pump and can cause corrosion to your pool equipment. If you do not go with the automatic chlorinator we would recommend at least going with one of our floating chlorinators so you do not damage your equipment you may view our floating chlorinators here http://www.inyopools.com/chlorinators_floating.aspx 

?     Asked on 1/30/2012by Guest

What is the difference between an inline and offline chlorinator?

A  Answered on 1/30/2012 by InyoPools Product Specialist Patrick P.

An inline chlorinator would be plumbed directly inline with the plumbing.  For an existing pool, this would mean a section of pipe would need to be cut out to install the chlorinator.  An offline chlorinator attaches to existing plumbing by chlorinator tubing (holes would be drilled into existing pipe to attach the tubing.)

?     Asked on 6/2/2021by Jessica Hightower

How many do you have in stock of the r171240

A  Answered on 6/2/2021 by InyoPools Product Specialist Patrick P.

We are currently showing 1 in stock.

?     Asked on 7/19/2022by Daniel H Fernald

Can you use granular chlorine with this chlorine feeder?

A  Answered on 7/20/2022 by InyoPools Product Specialist Craig C.

Hello Daniel. Per Pentair's published documents for their Automatic Chlorine/Bromine Feeders, " Pentair Automatic Chlorine/Bromine feeders are for use with slow dissolving trichlor or bromine tablets only."


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