By Rainbow Products



Model # R171096

Warranty 1 Year Warranty

Alternate Part #'s 42-196-1035, PENR171096

Product Description

Spend more time enjoying your pool and less time on maintenance.  The Rainbow 320 inline chlorinator is the simple and reliable way to sanitize your pool.  Plumb this unit inline with your pool or spa return line, fill with chlorine or bromine tablets, and set the control valve to the desired amount - it's that easy.  No more putting harsh chemicals into the skimmer which can harm your pool equipment.  No more swimming with a floating dispenser in the way.  The corrosion-proof Rainbow 320 canister holds 11 large (3 inch) or 98 small (1 inch) slow-dissolve Trichlor or bromine tablets.  Bottom feed design can also be drilled and tapped at the top of unit for increased chemical dispersion.


  • Comes standard with 2" slip PVC pipe fittings
  • Includes slip adapter for installation on 1-1/2" pipe
  • Uses slow dissolving Trichlor or Bromine tabs and sticks
  • Heavy-duty 1/2 in. control valve and a replaceable 1/2 in. check valve/elbow
  • Bottom feed line with option for top feed if additional chemical levels are needed
  • Top feed 1/2 in. x 18 in. extension tubing is included
  • Optional cap wrench and corrosion-resistant check valves available


  • Sanitizes 6,500 - 27,000 gallons bottom feed or 18,000- 70,000 gallons top feed
  • Dimensions: 17-3/4 in.(H) x 5 in. (W) x 10 in. (D)
  • Service clearance for lid removal is 19 inches

* Note: Consult your local authority to determine their guidelines if needed. Results may vary due to pool/spa equipment and many other factors.

Product Specifications

Large Tab Capacity:
Small Tablet Capacity:
4.5 Lbs.
Treatment Capacity:
6,500-27,000 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 2/6/2015by Byron

Can I buy parts for model 320 chlorinator? The seal has gone bad for the screw off top.

A  Answered on 2/6/2015 by InyoPools Product Specialist Brian M.

You may certainly buy parts for the Rainbow 320 chlorinator. Please click on the previous link and see all the part that are available to you. THe o-ring for the top cap, in particular, is #2 on the diagram.

?     Asked on 4/5/2015by Inyo Visitor

I have a 320 auto cholinator tank fills all the way up and overtop, pool chlorine very high, setting at 1, what causes this ??

A  Answered on 4/6/2015 by InyoPools Product Specialist Robert M.

If this is a new problem, the control valve may need to be replaced. Part number 2114-04 is the correct control valve.

?     Asked on 5/6/2015by Paul

Is the Rainbow 320 Inline Chlorinator a direct replacement for the Lifegard No. 320 chlorinator?

A  Answered on 5/7/2015 by InyoPools Product Specialist Andy O.

Paul- The Rainbow 320 will be a direct replacement for the Lifeguard 320.


Est. Repair Time

More than 8 hrs

Tools Needed

saw, sand machine, small hand triangular sand tool, glue

Jandy Pureline salt system problems

Written on 7/7/2021 by Guest

Salt system worked well for 8 years then have replace flow sensor twice then salt cell. Parts started to get expensive.

I got Rainbow 320 inline chlorinator and Blue Works Dummy bypass cell
1) Measure the size of Jandy salt cell
2) Cut the Blue Works dummy cell with the proper size adding the chlorinator to match exactly the Jandy cell
3) I have to sand the outer of the tread on the blue cell (both treads) to match the diameter of the outer diameter of the tread of the Jandy cell. I have used sanding machine gently to reduce the diameter evenly in both treads.
4) During the sanding process I tried several times to connect to the Jandy treading connector at the pipe Jandy connector in the pool equipment to make sure it was a perfect fit.
5) I had to use a small triangular hand sanding tool the to deep the tread on the dummy by pass cell tread. It was a process of patience until it reaches the perfect fit. When tie it up to the jandy connector.
6) The step 5 was repeated to the other tread of the dummy cell
7) Now inserted both parts of the dummy cell on each side of the chlorinator and adjust to perfect match of size of the Jandy salt cell
8) Mark with pen the correct position for the pipe in the rainbow 320, now remove both sides.
9) Apply glue and insert one side of the dummy cell cell into chlorinator
10) Repeat for the other side
11) Wait the glue to dry
12) Place the dummy cell now that has a Chlorinator and tie up the Jandy connectors.
13) try the pump on and observe o leaks.

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Est. Repair Time

1 to 2 hrs

Tools Needed

pvc cutter and glue

2     0

I wanted to have a inline chlorinator to make things easy.

Written on 1/25/2018 by Guest

I shut down the pump and relieved the pressure on line.Due to it being a chemical I also wanted to install a 2 inch check before the chlorinator.When u do this make sure valve is chemical resistant.After a coupling was used I tied in the chlorinator..Then glued in the last coupling.I let it set and started it up after adding 5 3 inch tabs.I started it on the lowest setting and went up from there.It works great!! I saved nearly300.00 by ordering it from INYO supply.

Thanks guys

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