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    Replacing pump hoses on the Bubble Magus doser

    sisterlimonpot
    sisterlimonpot
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    Replacing pump hoses on the Bubble Magus doser Empty Replacing pump hoses on the Bubble Magus doser

    Post by sisterlimonpot on Wed Apr 11, 2012 1:35 am

    Last week I notice that one of the surgical tubes on my Bubble Magus dosing pump started leaking from the pump that dosed alkalinity. I knew that I didn't want to let this go because if I did I would be back to manually dosing, and once you automate, you don't want to go back to doing anything manually again.

    I started researching to find a suitable replacement for the tubing, thinking that I would be able to find lots of threads on the subject and surprisingly enough, I couldn't find much. I asked on RC and got some info on a couple companies that may sale tubing that works. Someone posted the ID and OD of the tube and with that I ordered 8 feet of this
    from McMasters:

    Part Number: 5347K21
    ID: 2mm
    OD: 4mm
    Wall Thickness: 1mm
    Bend Radius: 7mm
    Cost Per Foot: $0.57

    The company is just south of us, I literally placed the order right before lunch today and when I got home from work the package was sitting at my door. Talk about quick!

    Here's the step by step:

    First things first, each one of those heads have 4 tabs, 2 on the top/bottom and 2 on the sides, the 2 that are on the sides clamp the head to the controller. All you have to do is get a good grip with your thumb and index finger and squeeze the tabs while pulling the head back away from the controller, slide it all the way back until it's completely detached from the motors shaft.

    Replacing pump hoses on the Bubble Magus doser Photobucket-7025-1334112412079

    Replacing pump hoses on the Bubble Magus doser Photobucket-4819-1334112443351

    Now that it's detached you can now start to disassemble the entire head, squeeze the 2 tabs on the top/bottom and this is where it was tricky to pry the 2 pieces apart, I luckily was able to get a fingernail in there to pry it apart enough to use a butter knife to get it the rest of the way.

    Replacing pump hoses on the Bubble Magus doser Photobucket-28517-1334112474663

    Replacing pump hoses on the Bubble Magus doser Photobucket-6285-1334112511874

    Replacing pump hoses on the Bubble Magus doser Photobucket-29895-1334112567438

    the rest is fairly straight forward, remove the disc that aligns the 3 rollers

    Replacing pump hoses on the Bubble Magus doser Photobucket-2338-1334112591288

    Remove the 3 rollers, make note of which way they came out

    Replacing pump hoses on the Bubble Magus doser Photobucket-2189-1334112616414

    Now the old tube can come out

    Replacing pump hoses on the Bubble Magus doser Photobucket-30679-1334112644070

    Remove the plastic clips that are on the old tube

    Replacing pump hoses on the Bubble Magus doser Photobucket-30679-1334112644070

    Replacing pump hoses on the Bubble Magus doser Photobucket-514-1334112668898

    Remove the adapters

    Replacing pump hoses on the Bubble Magus doser Photobucket-21469-1334112695945

    As you can see, the tube has seen better days, the definitely needed to be replaced.

    Here's the new tube. it's obvious that this isn't surgical tube, however the new tubing is pretty soft and seems that it will work as a suitable substitute. Time will tell...

    Replacing pump hoses on the Bubble Magus doser Photobucket-3322-1334112723996

    Unravel some and cut to the approximate length, you definitely don't have to be accurate, just as long as you don't cut it too short

    Replacing pump hoses on the Bubble Magus doser Photobucket-4488-1334112747138

    Replacing pump hoses on the Bubble Magus doser Photobucket-22152-1334112798120

    Now you put it back together in reverse order

    Replacing pump hoses on the Bubble Magus doser Photobucket-27748-1334112824909

    Put those clips back into the case

    Replacing pump hoses on the Bubble Magus doser Photobucket-901-1334112850132

    Replacing pump hoses on the Bubble Magus doser Photobucket-891-1334112875691

    Replacing pump hoses on the Bubble Magus doser Photobucket-2542-1334112903007

    Replacing pump hoses on the Bubble Magus doser Photobucket-1241-1334112927731

    Replacing pump hoses on the Bubble Magus doser Photobucket-1190-1334112955048

    Now I found this to be a very important step, You have to make sure you can rotate that disc, this aligns everything up, if you were to put it all together and you didn't align the tubing, you will either burn the electrical motor or ruin the rollers.

    So give it a couple spins to ensure movement, it won't spin easily so you have to give it some delicate pressure.

    Replacing pump hoses on the Bubble Magus doser Photobucket-487-1334112979299

    Once you're happy with it align everything and snap it into place

    Replacing pump hoses on the Bubble Magus doser Photobucket-7994-1334113005847

    Replacing pump hoses on the Bubble Magus doser Photobucket-28990-1334113030502

    Attach the head back to the unit ensuring you hear the clicks of the tabs

    Replacing pump hoses on the Bubble Magus doser Photobucket-7094-1334113060738

    do that to all of them and it should last another couple years

    Replacing pump hoses on the Bubble Magus doser Photobucket-28989-1334113083326


    One thing to also note is that to my knowledge the company doesn't sell just the tubing you have to buy the whole head unit and they are ~$20 a piece. After taking it apart I now realize why. The rollers have a thin rubber layer around them for the motor shaft to grip as it drives the rollers. That thin rubber layer obviously wears down and once it does the motors shaft will start to slip and ultimately stop driving the rollers altogether.






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    nikecivic
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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by nikecivic on Wed Apr 11, 2012 2:07 am

    Thanks for the info, I'll definitely have to.di this to my doser. the replacement tubing lookslooks thicker than the stock tubing.


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    MxReEfEr92
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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by MxReEfEr92 on Wed Apr 11, 2012 2:08 am

    It also looks way better


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    sisterlimonpot
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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by sisterlimonpot on Wed Apr 11, 2012 8:36 am

    Mike,
    I'm not sure what the tubing size was in its original form, mine was flattened and stretched out, but the one thing I know is that the wall thickness is definitely thicker. time will tell if this will work. I would also imagine that.if there is a difference in the tubes inner diameter that's going to change the accuracy of the dosing.

    buy we'll have to see . I'm about out if calcium so before I refill the bottle I am going to pump 100ml or rodi through it to see how accurate it still is.

    Cory,
    it does look better, and hopefully with the thicker tube it will last longer.


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    nikecivic
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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by nikecivic on Wed Apr 11, 2012 8:51 am

    The accuracy can be checked with a graduated cylinder.


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    MxReEfEr92
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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by MxReEfEr92 on Wed Apr 11, 2012 4:10 pm

    what kind of 2part are you using? BRS?


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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by sisterlimonpot on Wed Apr 11, 2012 7:06 pm

    nikecivic wrote:The accuracy can be checked with a graduated cylinder.

    I'm going to use a graduated measuring cup.. Smile


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    sisterlimonpot
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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by sisterlimonpot on Wed Apr 11, 2012 7:08 pm

    coryg wrote:what kind of 2part are you using? BRS?
    Yeah, BRS seems to have the highest grade for the lowest price. I changed from B-ionics about 9 months ago.

    I also dose mag as well on a seperate doser.


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    dfladermaus
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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by dfladermaus on Wed Apr 11, 2012 8:54 pm

    There is a reason why the peristaltic pumps use those rubber tubes...hopefully the ones you got hold up.
    sisterlimonpot
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    Post by sisterlimonpot on Thu Apr 12, 2012 8:47 am

    yeah, I'm keeping a close eye on it, the new tubing is very soft but not as thin as the surgical stuff.


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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by dfladermaus on Thu Apr 12, 2012 12:48 pm

    I think that maybe there is something in those surgical tubes that makes them last longer and also makes the rollers work better. I should ask around, we have a ton of peristaltic pumps in some of the labs here.
    dwolson2
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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by dwolson2 on Thu Apr 12, 2012 12:51 pm

    you want to get a rid of any of them Wink


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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by dfladermaus on Thu Apr 12, 2012 1:13 pm

    Not mine to get rid of unfortunately.
    sisterlimonpot
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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by sisterlimonpot on Thu Apr 12, 2012 4:51 pm

    dfladermaus wrote:I think that maybe there is something in those surgical tubes that makes them last longer and also makes the rollers work better. I should ask around, we have a ton of peristaltic pumps in some of the labs here.
    Paul,

    Please do, I for one would like to know the answer to that.


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    MxReEfEr92
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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by MxReEfEr92 on Thu Apr 12, 2012 5:39 pm

    Hmm that would be interesting to find out


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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by dwolson2 on Thu Apr 12, 2012 11:07 pm

    dfladermaus wrote:Not mine to get rid of unfortunately.
    Just giving you a hard time, I figured as much.


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    Replacing pump hoses on the Bubble Magus doser Empty Re: Replacing pump hoses on the Bubble Magus doser

    Post by sisterlimonpot on Sun Apr 15, 2012 2:52 pm

    This morning I refilled my containers with new alk, calc, mag and vodka. Before putting everything back under the tank, I tested pump #2 by pushing 1000ml through the pump and measures it, I did the same thing when I first bought it and here are the results that I had new and what I got this morning:

    Brand new, programmed to push 1000ml it pushed a little over 900ml (graduation marks were 50ml increments)


    Today with new hoses programmed it to push 1000ml, it pushed exactly 800ml.


    Before changing the hoses I had it programmed to dose 75ml a day (alk and calc) but in actuality I was dosing 67.5 ml a day, now that I have the new hose on, I'm actually dosing 60ml, to compensate I need to increase the daily dose to 84ml to get back up to 76.2. Which is what I did this morning.

    As long as you compensate for the differences and know that you are putting 0.8ml to every 1ml that is programmed, you'll be set.

    Paul, have you gotten any information on why to use only the surgical hose?



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