Model # R171096
Warranty 1 Year Warranty
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.
* Note: Consult your local authority to determine their guidelines if needed. Results may vary due to pool/spa equipment and many other factors.
i have a 37000 gallon pool. How long should I have to run my pool to get the bromine to the level it should be?
Hi, Laurie Bellows. It's hard to say how long. It depends on how much bromine is in the unit, the flow rate of the pump etc. Also, bromine can not be stabilized so it's will not remain in the pool for a long time so it will have to be continually circulating.
I have a lifeguard 320 inline chlorinator which looks like the rainbow 320 it is 28 years old and failing. Can I replace it with the rainbow 320 without any "mainline" retrofits? It looks to be about the same unit. Thanks Walt
HI, Walt. Since your current unit is 28 years old, the new style chlorinator will not fit so you will have to replace and replumb a new 320 Chlorinator.
Is this the proper chlorinator for a 33000 gallon in ground pool?
Hi. This Rainbow 320 Inline Chlorinator is sufficient for a 30,000 gallon pool.
low valve is not working properly. defective.Also need insalation inst, this is for a pentair rainbow chlorine feeder modle 320
Hello, You can view the owner's manual under documents tab on the item page. It will have some basic troubleshooting that you can perform as well.
Why does my current chlorinator run dry and suck air into the system?
Hi. Your cholrinator is dry because water is not flowing through the unit. The chlorinator is on the pressure size of the system so it's unable to suck air into the system. The problem is on the suction side of your system. To troubleshoot this issue, follow the steps in out How to Identify and Correct Air Leaks guide.
I have a 20 year old Rainbow Lifegard model 320 chlorine feeder. Was clean it out in that debris was in the check valve. When cleaned it out buy takening apart I noticed that the Lock screw was screwed all the way through the cannister. Is this correct?
Hi, Jimmy. It is okay if the screw goes all the way through the tee.
I have a Rainbow chlorinator #320 but have noticed the tube doesn't fill with water as others have described. I can feel water movement through connector tube and at base. What could be the issue. The equipment is only 8 months old. Thanks
Hi. The issue could be that you do not have enough water flow, the unit is clogged or the unit was not installed properly with 6" or of straight pip on either side.
I Have a Rainbow chlorinator # 320 I need 2 R172272 1/2 " NPT X tube fitting with nut. Do you have one that you can overnight to me? Help!!
Yes, it is in stock, but at this time it would not get out today. It would get shipped out tomorrow so if you next day aired it, it would not get to you until Monday.
I have a pentair model 320 inline pool chlorinator that is leaking where the base is attached to the threaded T fitting. Is there a o-ring or gasket there that might be leaking, and if so , how do I replace it?
Hello Joyce- here is a link to the Rainbow 320 Parts Diagram. In the diagram, I would like you to look at 17, 18A, 21, and 22 on the diagram. To access this area, you would need to remove #18A, the locking screw. This will allow you to access the #17 o-ring between the #22 Tee and the tube. You would need to order #17 O-ring, Bottom-Inline (128).
How much pressure is required for this chlorinator. I approached my pool builder about a 2 speed pump so I could run the filter pump / chlorinator just as long but not use as much electricity, and he said the 2 speed pump did not provide enough pressure for the chlorinator?
Your pool guy is probably concerned with the decreased flow rate which will cause the chlorinator to produce less chlorine than when it is on high. I am guessing he is concerned with your pool turning green due to not enough chlorine being applied to your pool.
The o ring for the cover had dried out. Can I buy one? Thanks Joe
Hi Joe, We do have the Cap O-ring (Viton) (R172009) for this unit available for purchase.
will this work on a water well
Hi Jim, This chlorinator can be used to on a well water system.
I’ve a 320 inline chlorinator and it’s bottom feed. No matter how high I set the feed dial the free chlorine is always low. I set the feed dial to 0 off, removed the lid and turned the pump on and the tube filled with water in seconds and started to overflow. I shut the pump down and the tube drained slowly. Is there anything wrong with the chlorinator? Thanks!
Hello, how long have you had your chlorinator? If it's more than 3-4 years old and you haven't replaced the feed tube it could be caked up with residual chlorine. Feed tube and parts are here.
the length of damage hose is about 8 inch. the new is 18. just leave the whole hose in and not cut it down
You will need to cut the larger hose down to replace the damaged one. I would recommend removing the old hose and using that length as a template for trimming the new tube.
dear Sir/Madam Good Day Please i want to know the mentioned part model no. Rainbow 320 Inline Chlorinator - R171096 - how much one pc. weight? please reply me my mail
Hello, The weight of the chlorine feeder is approximately 7.5 lbs.
the nob and hose assembly on the outside of my rainbow lifegard model 320 inline chlorinator has a small leak. Is this part sold separately or do I have to purchase a new chlorinator?
You're able to purchase the individual parts for that. Here's the part diagram for that chlorinator so you can identify which parts you're needing to replace.
Can I just get the valve for the 320? or do I have to order the whole assembly?
Can the rainbow 320 be used on salt water pool?
Yes, it can, but if you have a salt chlorine generator, an offline chlorinator should not be necessary.
Does this chlorinator come in a clear feeder
Hi Wanda yes here is the Rainbow 320 Clear Chlorinator.
I have a Rainbow 320 inline chlorinator on my 14,000 gallon in ground pool with a ozonator. The pool and equipment was installed in 2009. The 320 seems to be working properly; water drains when opens, fills when turned on and the tablets are dissolving etc, but no matter how high I set the feed dial the chlorine is always low. Could there be something plugged that needs servicing?
I have a Rainbow 320 in-line chlorinator, my tablets are not dissolving. There is water in the unit. What could be the problem?
There could be a number of issues that can cause these tablets to not be dissolving. There could be a pinched hose, clogged chlorinator, or even insufficient flow from an equipment issue. I would advise to trouble shoot all of the above and if no success consider having a technician inspect the system.
Is this the same product as the Porpose No. 320 Chlorinator?
The Porpoise 320 chlorinator looks to be nearly the same exact chlorinator.
I need to lengthen the hose on my chlorinator. What hose is used? I want to make sure to get something that is chlorine resistant. Thanks!
Hello Charlie - We sell 8' sections of the chlorinator tube. Part number R172023 (6704-0) is the correct tubing.
Bought a new rainbow 171016 clorinator. Instructions show no screen in bottom. my old one had one. Do the new ones not use it?
Hi, The Rainbow Chlorinator 171016 which is the offline model does not use the bottom screen.
I have a 12,500 gallon in-ground pool. How many tablets should I put in the Pentair 320 at any one time? Do I fill it up or use a n umber associated with the size of my pool?
Hi, You can fill up the chlorinator but set it on 1 or 2 depending on where you want your chlorine level to be. Also you would want to monitor the CYA level of your pool, if high reduce the amount of tablets and set at a higher output level.
I have a variable speed pump and there is not enough water coming into the unit as these pumps are designed to save money by running at a lower speed. I don't want to run the pump higher just to get water into chamber.
Hi Ross, Variable Speed Pumps are designed to run on a low speed to save money, however certain equipment need a certain amount of flow to operate properly. If at the current speed your pool is being properly chlorinated then it's ok.
do I need to recharge my chlorinator everytime I open the lid to check it?
I recommend refilling the chlorinator if and when the pool chemistry calls for it. If the chlorine level is maintaining a high level then either add less or none until that level lowers a bit. If low then a shock and refill is necessary. If its maintaining a level chlorine reading then yes refill.
I brought a replacement flow regulator and it will not quite fit onto the existing threaded spigot on the main body of the chlorination. Is this a common problem?
Norm, this is not a problem we have run across. Can you double check that your chlorinator is indeed a Rainbow 320?
Is the Rainbow 320 Inline Chlorinator a direct replacement for the Lifegard No. 320 chlorinator?
Paul- The Rainbow 320 will be a direct replacement for the Lifeguard 320.
I have a 320 auto cholinator tank fills all the way up and overtop, pool chlorine very high, setting at 1, what causes this ??
If this is a new problem, the control valve may need to be replaced. Part number 2114-04 is the correct control valve.
Can I buy parts for model 320 chlorinator? The seal has gone bad for the screw off top.
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.
I have a Rainbow 320 in-line chlorinator that the tablets never seam to dissolve?
The main reason will be the screen at the bottom of the tube. Part number #2114-16. You can try first removing the tablets and pouring hot water in to help disolve what is gumming up the screen. If that does not rememdy the problem, a new screen is needed.
Can the Rainbow 320 inline chlorinator be used on an above ground round 28' x 4' pool or is there another type I should be looking at?
You can only use the Rainbow 320 inline chlorinator on your above ground pool if it is plumbed using schedule 40 pvc. For a standard above ground pool chlorinator, you can take a look here
I own a Rainbow 320 Chlorinator. When the unit is running, is the chamber with the chlorine tabs supposed to fill to the top with water, regardless of the dial setting (1-10)? When I open the top to put in more tabs, the water level quickly drains from the chamber. Is this normal?
No, the water is not supposed to be filling the cylinder. Water would only reach the first couple of tablets. Water will always drain from the unit once the lid is removed. This is because the pressure is released from the system when the lid is removed.
What is the distance from end to end where the Rainbow 320 chlorinator hooks up to the piping?
The Rainbow 320 Chlorinator measures 17 ¾" H x 5" W x 10" D and will hook up to either 1.5" or 2" plumbing.
The water in my Rainbow 320 Inline Chlorinator keeps draining. Do I need to replace any parts? Seems to be draining water faster than water is coming in.
It sounds like you may need to replace an o-ring or gasket, We do carry all of the replacement parts for the Rainbow 320 Inline Chlorinator. However, Pentair's technical support should be able to assist you. Their toll free number is 1-800-831-7133.
Does the ozonator install before the Rainbow Inline Chlorinator? Or after?
The ozonator should be installed after the chlorinator.
I am interested in purchasing the Rainbow 320 Chlorinator. I have hose for all three pool lines, however, I would like to replace them with PVC considering the chlorinator would have to be hooked up on PVC. Can you list the PVC parts I would need to hook it up to my filter?
Unfortunately, we do carry any PVC plumbing supplies. You should be able to find the PVC supplies at any local hardware store though.
What size pool is the rainbow 320 designed for?
The Rainbow 320 Inline Chlorinator is designed for pools between 6,500 - 27,000 gallons.
I have a Rainbow 320 Inline chlorinator. It seems to be clogged. Can I unscrew the body (holds the 3"tablets) and then clean out the plastic screen at the bottom or is there a better way to unclog the chlorinator?
We recommend that you contact Pentair directly for more information on cleaning out your chlorinator. Their technical support should be able to assist you. Their toll free number is 1-800-831-7133.
The cap is stuck and when I try to open with a bit of force the whole cylinder turns. Do you have any recommendations on how to remove?
I would suggest using the cap wrench, which can be seen and purchased here http://www.inyopools.com/Products/07501352029066.htm. This cap wrench is specifically designed for removing the Rainbow Cholrinator lid with ease.
I would like to know if the Rainbow 320 Inline Chlorinator would be sufficient for a 28,000 gallon pool (18x38).
This is the correct chlorinator for your size swimming pool.
I purchased the Rainbow 320 Inline Chlorinator for my above ground pool. The instructions that came with it states that if it is installed below water level, an additional kit is needed to tap into the line going back to the pool. I don't see this kit nor am I sure if this is mandatory. I also purchased the check valve when I purchased this product. Would I still need the kit and the check valve?
We spoke with Pentair, the manufacture of the Rainbow 320 Inline Chlorinator and they stated that if you have the check valve you would not need the kit referenced in your owner's manual.
Is there a feedback mechanism on the Rainbow 320 Inline Chlorinator that tells the unit the chlorine balance in the pool? Is there a way for me to set an automation that adds chlorine to keep the pool at the correct level? Or, just another place to put the tabs aside from the the drain basket?
There is a dial on the Rainbow 320 Inline chlorinator which has a setting from 1-10. If you set the dial on 1 it will be releasing the least amount of chlorine to the pool. If you have it set at 10, this would send the most amount of chlorine into 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 an automatic chlorinator we would recommend at least going with one of our floating chlorinators so you do not damage any of your equipment.
I broke my Hayward CL200 Chlorinator trying to get the cap off. Is the Rainbow 320 Inline Chlorinator any better or easier to use? Which one holds the most chlorine?
The Rainbow 320 Inline Chlorinator holds eleven 3" tablets or 98 1" tablets. I am not sure how this compares to the Hayward model, as they only tell us that the CL200 holds 9 lbs. of tablets. We like the Rainbow Chlorinator because it offers better flow than the Hayward CL200, which reduces down to a lower diameter. Pentair also offers an optional wrench that can be used to remove the cap on the Rainbow 320. You can view and purchase the cap wrench here on our website.
I'm replacing an existing Rainbow Model 320. Can this new Rainbow Inline Chlorinator be screwed in?
The Rainbow 320 Inline Chlorinator is a slip connection; it does not have a threaded connection. You might want to consider either the Hayward CL100 or CL200 chlorinator. Both of which are threaded. These can be seen at: http://www.inyopools.com/chlorinators_hayward.aspx. Please note this would require some minor plumbing adjustments.
What is the concentration of chlorine as it exits the Rainbow Inline chlorinator and can it be adjusted?
To change the amount of chlorine released into the pool, there is an adjustment on the chlorinator. For the specific chlorine concentrations, you would need to contact Pentair's technical support. Their toll free number is 1-800-831-7133.
Is it OK to install an inline chlorinator when my pool has copper connection pipes?
Yes, but you would want to use a copper to pvc adapter when connecting the copper to the inline chlorinator.
How many 3" chlorine tabs will the Rainbow 320 Chlorinator hold?
The Rainbow 320 Chlorinator holds approximately 11 large (3") tablets or 98 small Bromine or Trichlor slow dissolving tablets. You can view our entire selection of chlorine and bromine tablets here.
My chlorinator has begun to make a tattering sound,seemingly coming from the base of the unit. It appears to be operating OK. Have you experienced this in this unit before?
No, we have not experienced this problem. The most common item on this chlorinator that needs to be replaced is the lid O-ring. You might want to contact the manufacturer directly. There contact information can be found at www.Pentair.com We can provide you with any of the parts they recommend.
I own a Rainbow Lifeguard chlorinator 320 and have a slow leak. I assume it is in the flex hose which seems to be about 6-8 inches long. Do I just have to replace the hose? How do I do that? Is there a name for that flex hose so I can get a replacement? Thanks for any help you can provide.
Yes, we do sell the replacement parts for the Rainbow 320 chlorinator. This is a common part that typically needs to be replaced. You can view the entire Rainbow 320 parts listing here. There are two compression nuts that need to be removed, which makes replacing the hose relatively simple.
What is the difference between an inline and offline chlorinator?
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.)
What size pool is the rainbow 320 designed for?
The Rainbow 320 is designed for pools between 6,500 - 27,000 gallons.
I am having problems removing the lid to my Rainbow 320 chlorinator do you have any suggestions?
We would suggest using the wrench which is specifically designed for removing the Rainbow Cholrinator Lid you may purchase this part through this link http://www.inyopools.com/Products/07501352029066.htm and you may view a picture of this wrench through this link http://www.optimusparts.com/onlinecatalog2006/sec_a/a-14b.pdf
Does the in-line chlorinator come with a check valve, or must it be purchased separately?
No this does not come with the check valve. We would highly reccommend purchasing one of the check valves listed on this page http://www.inyopools.com/valves_flo_check.aspx
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?
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
How many 3" chlorine tabs will it hold.
Holds 11 large (3") or 98 small (1") Bromine or Trichlor slow dissolving tablets
What kind of chlorine tablets do I use with this type of chlorinator? Do you sell them?
You can use either 1" or 3" tablets. We sell both - here is a link to the chlorine tablets: http://www.inyopools.com/chemicals_sanitizers.aspx
(4 out of 5 stars) Excellent product and would recommend
Reviewed By: Nick from Ft. Worth, TX ()
Pros: I swapped an 11 year old version with this one and it fit perfectly. Didn't have to do any PVC cutting, etc
Cons: Black plastic tube that connects the unit to the main water line is very rigid. I had spend a lot of time trying to prevent the line from kinking.
If you want to stop putting tablets in your skimmer baskets then this is the product for you. It has adjustable flow from the main water line to the tall tablet container. This allows you to dial in the ammount of chlorine during the season. Just keep the tablet container full and during up the chlorine during the summer and lower the ammount during the winter. Install was easy for me because I was replacing an 11 year old unit. The old unit still worked except the black connector tube broke a couple years back. I could have bought just the tube but for the price I just decided to get a new unit. I forgot how much I liked the Rainbow once I started using it again. I have pool maintenance, which I do myself, so this took a good chunk of the work out of maintaining the pool