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Old 04-07-2015, 04:13 PM   #1
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Chlorine injection tube popping out


I've been self-maintaining our Culligan water filtration system for a few years now without too much issue.

On this last maintenance cycle where I changed the tube in my chem feeder (Stenner) and the rubber check valve (also Stenner) the tube connecting the high pressure side of the feeder to the injection point keeps popping out at the injection point.

I checked the rubber check valve and it flexes just fine and "opens" when I apply some pressure.

There are no obstructions in the injection point.

I've changed and re-seated the rubber check valve a few times to not much avail.

It will be good for a day or 12 or so hours and then it pops out.

I've tried stabilizing the tube so it doesn't move so much thinking maybe the movement was wiggling it out but again, no luck.

I replaced the ferrule and the nut too, no luck.

I even replaced the tube in between for giggles, still no luck.

I've gone so far as to super glue the ferrule to the tube to give it some extra holding power and that has given me 24 or so hours before it does finally pop the tube out.

Has anyone else run into this or possibly have any advice?

Thank you =)

Last edited by scrupul0us; 04-07-2015 at 04:17 PM.
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Old 04-07-2015, 07:35 PM   #2
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I can't help you out, but there are a couple of great water treatment techs that frequent this forum. Please wait for one of them to respond. Thanks.

Please post a couple pics of your set-up so they can see what you're talking about. thanks.

Click post reply, type a few words, scroll down to manage attachments, upload and post pics from there.

Albany, not to far from you. I'm in Ballston spa, Saratoga County.
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Old 04-08-2015, 06:14 AM   #3
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Thanks Jmon, I'll post something tonight once I get home from the office.

Nice to meet a local on here, I work in Latham and live over in Voorheesville so not far by any means =)
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Old 04-08-2015, 02:31 PM   #4
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I had the same problem. Where the injector tube goes into the water line, there is a small reed valve that works like a check valve. Remove the plastic part from the water line and see if water will go through the end of the part while still hooked to the injector line. The reed valve has gotten hard and not working properly. I removed the whole part and took it to my Culligan deal and got a new one. When I hooked the new valve to the injector line water came out without any problem.
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Old 04-08-2015, 02:56 PM   #5
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@Landfill: When I remove the un-screwable piece of the injection site there is no obstruction to the water line (I can pass a phillips head screw driver through the 1/4" hole without issue)

The check valve I have replaced twice... It is quite "supple" and opens freely...

Whats odd is after I do all that and run the system through, it goes OK... I am able to open the test spigot after the injection site to test the water and confirm I am injecting chlorine just fine...

So it's a bit of a mystery as to what is causing the pressure to randomly build and then cause the tube to pop
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Old 04-08-2015, 03:30 PM   #6
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Try 100% pure silicone caulk let it dry.
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Old 04-09-2015, 11:48 AM   #7
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What kind of Chlorine are you using for the injection?

I would be looking at the check valve as the reason , some thing is pluging it from time to time and then the back pressure pops it off.
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Old 04-10-2015, 08:35 AM   #8
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I use regular Chlorox bleach ( i can feed less than if i use bargain brand )

I completely agree about the check valve but I've reseated it and changed it (now three times)

I ran the feed through a cycle not hooked up and the chlorine comes right out of the tube unobstructed so I know my tube is good.

Right now I'm in a situation where the tube has stayed in, but the chlorine is bleeding around the ferrule ever so slightly and "running" off the top of the injection nut...

Sigh... The check valves are brand new ( I buy them from uswatersystems.com )...
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Old 04-10-2015, 11:00 AM   #9
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What are the part numbers that your using?
A photo of the set up?
Some thing as you know has changed, finding what has changed is the challenge.
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Old 04-10-2015, 02:29 PM   #10
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I've been using these:

Stenner Santoprene Duckbill - 5 Pack

Part number on the site is: 411-MCCVDBO

http://www.uswatersystems.com/stenne...ll-5-pack.html

I've been using these for ~4 years now

I'll grab a photo tonight, sorry its been hectic at home with the kids and stomach bug going around :/
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Old 04-10-2015, 03:13 PM   #11
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Which way are you placing the ferrule? flat side to the nut and the smallest part going into the fitting that the tube is going into?
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Old 04-10-2015, 03:23 PM   #12
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Beveled edge of the ferrule facing down (towards the water side, end of the tube) the collar side facing up towards the nut

When I tighten the nut down I can see the top of the collar.
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Old 04-10-2015, 03:49 PM   #13
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Sorry about the low quality photo but the photo shows how the ferrule is to go on tubing.
Attached Thumbnails
Chlorine injection tube popping out-150410_001.jpg  
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Old 04-10-2015, 07:24 PM   #14
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This is how I have mine faced

http://static.grainger.com/rp/s/is/image/Grainger/21YA17_AS01?$mdmain$
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Old 04-10-2015, 07:33 PM   #15
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Which is the same way, if there is a check valve in that assembly then that would be what I would be looking at for the over pressure that blows off the line.
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