By Rainbow Products



Model # R171215

Alternate Part #'s 42-196-2008, PENR171215

Product Description

The high capacity HC-3315 Rainbow chemical feeder is very durable and highly reliable. Intended for 1-inch hard plumbing installations. High capacity automatic chemical feeders work best with commercial applications.



  • Holds 15 lbs. of tablets.
  • Treats up to 20,200 gallons with Bromine.
  • Treats up to 97,600 gallons with Trichlor.


  • Dimensions: (H) 21-1/2 in. x (W) 8 in. x (D) 15 in.
  • Service Clearance: 22-3/4 in.

Product Specifications

Large Tab Capacity:
30 Tablets
Small Tablet Capacity:
15 Lbs.
Treatment Capacity:
20,000-97,000 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 8/15/2012by Guest

The description for the Rainbow HC-3315 says that it is best for commercial pools. Does that mean that it would be too much Chlorine or a problem for a residential pool?

A  Answered on 8/15/2012 by InyoPools Product Specialist Patrick P.

You may have to keep the dial turned down to the lowest setting. We would recommend the Rainbow 320 Inline Chlorinator for residential pools of your size.

?     Asked on 3/17/2015by Glenn

I have a 50,000 gallon pool. What would be your recommendation on an in line chlorinator ?

A  Answered on 3/18/2015 by InyoPools Product Specialist Robert M.

Hello Glenn - The Rainbow 320 chlorinator can handle up to 70,000 gallons.

?     Asked on 5/20/2015by steven

I have a 3000 gallon spa using a Hayward chorine feeder. I'm always having problems with the top cover leaking. I'm looking for something is more durable and easier to work with. is it easy to hook up? Thank you

A  Answered on 5/20/2015 by InyoPools Product Specialist Patrick P.

Hi Steven, I think this chlorinator may be overkill for a 3,000 gallon spa as it is intended for pools up to 96,000 gallons. I really like the Custom Molded Products Chlorinators and they are easy to hook up.


Review Summary

 (Average 4.5  out of 5 stars)
2 Rating
5 star:
4 star:
3 star:
2 star:
1 star:

The Most Helpful Review

The Most Recent Reviews