Ferrules not fitting drainage tubes for Stenner Pump

[thephatp]

Noticed a leak at my Stenner pump and realized I needed to replace the 1/4" drainage tube. I bought replacement tube (the tube was generic LDPE) and ferrules (Stenner UCAK200 Ferrule 1/4-Inch, Pack of 10) off Amazon, but when they arrived, the ferrules slid really easily on the tube--no friction at all. I tried it anyway, and of course, it didn't hold.

Then, I bought the replacement Stenner tubing (Stenner AK4002B 1/4" x 20' UV Black Roll) and different ferrules, but again, none of the ferrules will hold any friction against the tubing. I should also note that even the ferrules that came with replacement #2 pump roller tube do not fit either, as they also slide around.

Thus, what is happening is that the tubing works its way out of the pump after some time of operation.

Any ideas on what I'm doing wrong? Is it user error? Just unlucky multiple times with the ferrules? Is there something else I can/should put on to hold the line in place?

I've been manually chlorinating for nearly 2 weeks now--what a pain.

 

[Flying Tivo]

You need a new tubbing. Stenner peristaltic metering pump official part numbers pump tubes

and connectors.

Official Stenner parts connectors connecting nuts ferrules adapter

Official Stenner parts connector part numbers connecting nuts, ferrules, connecting nuts with adapter; Works With column match part with pump

stenner.com

They are supposed to be changed once a year.

 

[thephatp]

You need a new tubbing. Stenner peristaltic metering pump official part numbers pump tubes
View attachment 584571
and connectors.

Official Stenner parts connectors connecting nuts ferrules adapter

Official Stenner parts connector part numbers connecting nuts, ferrules, connecting nuts with adapter; Works With column match part with pump

stenner.com

They are supposed to be changed once a year.

I did change that. My problem is the 1/4" discharge / drainage line that connects to those--the ferrule is not holding the 1/4" line in properly.

When I first installed the pump, the ferrules were hard to get onto the tube. This made sense to me, because you want the tube to stay in place.

When I replaced the 1/4" discharge line, the ferrules just "slide" down the tube with very little friction. I noticed this, but tried it. Sure enough, the discharge line worked its way out and spayed chlorine everywhere.

I'm trying again, as I at least feel a little more friction with this new tubing I just got in today.

That said, is there supposed to be friction when putting the ferrule on the tube, or does it typically rely solely on the tightening of the nut on tubing to which you linked?

 

[Flying Tivo]

That said, is there supposed to be friction when putting the ferrule on the tube, or does it typically rely solely on the tightening of the nut on tubing to which you linked?

Not really but, the inside where the tubbing goes has lost its diameter. That is why i suggest a new tubbing so it will seat better and creat the seal. Now are you installing the ferrule correctly? Some ferrules are bidrectional but the stenner ones are one way.

 

[thephatp]

Not really but, the inside where the tubbing goes has lost its diameter. That is why i suggest a new tubbing so it will seat better and creat the seal. Now are you installing the ferrule correctly? Some ferrules are bidrectional but the stenner ones are one way.

Ah, that makes sense. I'll give that a go this let you know what I find. Thanks!

 

[thephatp]

@Flying Tivo - Quick update. Turns out the injection check valve was clogged and it was causing pressure to build up in discharge line, which is why it was working it's way out (and it was happening really fast). I replaced both the valve and the line (since the line was 2 years old), and it's back up and running!