Rainbow HC-3315 High Capacity Auto Feeder


MANUFACTURERRainbow Products

  (4.5 out of 5 Stars on 2 Ratings)

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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.
Tablet Capacity:
15 lbs.
Treatment Capacity:
Up to 97,600 gal.
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Asked on 08/15/2012 by 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?

Answered on 08/15/2012 by 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 03/10/2007 by 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?

Answered on 03/10/2007 by 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 

Customer Reviews

Ratings Summary

Average Rating:   (4.5 out of 5 Stars)

Recommended: (100%) 2 of 2 customers would recommend this product to a friend.

2 Ratings 5 star:   (1) 4 star:   (1) 3 star: (0) 2 star: (0) 1 star: (0)

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   (5 out of 5 Stars) be careful

Reviewed By: from Saginaw MI ()

Pros: very dependable

Cons: no warnings about top ring failure when the unit is completely turned off

This is a great chlorinater. It kept up very well with the holiday crowd. I will advise that you do not want to leave both the inlet and outlet shut off for a long period of time with tablets in the canister. I found out the pressure builds up and the top ring will fail.

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   (4 out of 5 Stars)

Reviewed By: from Port Aransas, TX ()

Pros: Easy to Install

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