Model # R171215
HC-3315 Rainbow High Capacity Chemical Feeder ✅
Use For: Commercial pool and spa applications with 1" hard plumbing installations
Product Overview
The HC-3315 Rainbow High Capacity Chemical Feeder is built for durability, reliability, and efficiency in demanding commercial environments. Its large capacity makes it ideal for maintaining consistent sanitation in high-volume pools and spas.
Features
✅ High Capacity – Holds up to 15 lbs. of tablets for extended operation between refills
✅ Versatile Treatment – Treats up to 20,200 gallons with bromine or 97,600 gallons with trichlor
✅ Commercial Grade – Designed for continuous, heavy-duty use in commercial pool facilities
✅ Durable Construction – Built to withstand harsh chemical exposure and high flow rates
⚠️ Plumbing Requirement – Intended for 1" hard plumbing installations
➡️ Low Maintenance – Reduces operator intervention with large tablet capacity and efficient feed design
Specifications
Model: HC-3315
Tablet Capacity: 15 lbs.
Treatment Capacity:
Bromine: Up to 20,200 gallons
Trichlor: Up to 97,600 gallons
Dimensions: (H) 21-1/2" x (W) 8" x (D) 15"
Service Clearance: 22-3/4"
Plumbing Size: 1" hard plumbing
Application: Commercial pools and spas
Tech Tips
✅ Match Chemical Type: Ensure correct tablet type (bromine or trichlor) for your application and dosage needs.
✅ Flow Control: Adjust feed rate to match pool volume and bather load.
✅ Routine Inspection: Check O-rings, seals, and feed mechanisms regularly to prevent leaks.
✅ Proper Placement: Install in-line after the filter and heater to prevent chemical damage to equipment.
✅ Chemical Safety: Always wear gloves and eye protection when loading or servicing the feeder.
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?
Reply
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
Reply
What is the difference between an inline and offline chlorinator?
Reply
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.)
Reply
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?
Reply
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.
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I have a 50,000 gallon pool. What would be your recommendation on an in line chlorinator ?
Reply
Hello Glenn - The Rainbow 320 chlorinator can handle up to 70,000 gallons.
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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
Reply
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.
Reply
The Most Helpful Review
2 0
(5 out of 5 stars) be careful
Reviewed By: Matt Z. 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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The Most Recent Reviews
1 2
(4 out of 5 stars)
Reviewed By: Mike S. from Port Aransas, TX ()
Pros: Easy to Install
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