Tank Connector advise

Discussion in 'Beginner Discussions' started by JDV, 20 Mar 2012.

  1. JDV

    JDV

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    Hi Guys

    What is the best way to secure a tank connector or Bulkhead? Do I use the rubber and back-nut supplied with it or do I rather silicone it?
     
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  3. RiaanP

    RiaanP Moderator

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    silicone and back-nut.
    silicone under flange on the thread and on the nut.
    Do not over tighten it. You can easily crack the glass.
     
  4. JDV

    JDV Thread Starter

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    ok cool, thanks
     
  5. LuckyFish

    LuckyFish MASA Contributor

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    Not that I want to confuse you, but I would use the rubber and the backnut outside. Silicone doesn't bond with the plastic from the connector and the water might find a way down the thread. If it starts leaking with the use of silicone, there is no way to fix it easily. Also a thick rubber gives at least a bit flexibility around the glass. Backnut outside, just in case the rubber shrinks over the years, so you still can tighten the nut a bit more.
     
  6. Clownfish9906

    Clownfish9906

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    hi guys - am I correct in saying the glass will be between the two black rubber washers with locking nuts on either side???

    [​IMG]
     
  7. LuckyFish

    LuckyFish MASA Contributor

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    100%!

    The inside (wet) washer will be the seal and the outside washer will be more for a bit flexibility.

    Locking nuts on either side? I don't understand.

    The left part in the picture will be wet and the right part will be outside the tank. The glass will be in between the two rubber gaskets.
     
    Last edited: 20 Mar 2012
  8. belindamotion

    belindamotion Google Master

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  9. Clownfish9906

    Clownfish9906

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    Just remember the black part is the tank connector...it has a fixed end with a threaded nipple going through the glass with washers on either side of the glass - locked on the inside with a plastic nut...just one, not two as I said...
     
  10. LuckyFish

    LuckyFish MASA Contributor

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    Actually good advice. 6mm tanks I would re-inforce, when drilled through the base.
     
  11. Clownfish9906

    Clownfish9906

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    I've got a overflow box made of 6mm...but the tank is 10mm. Do I still need to reinforce?...damn I hope not...was a mission to get the tank connectors and enlargen the holes...
     
  12. LuckyFish

    LuckyFish MASA Contributor

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    just one, not two as I said... That is correct.

    locked on the inside with a plastic nut. Also correct, but not advisable. As I mentioned before, in case of a leak, you can tighten the nut from the outside. Try that with a fully stocked tank from the inside. ;)
     
  13. LuckyFish

    LuckyFish MASA Contributor

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    Not needed. 10mm is fine.
     
  14. JDV

    JDV Thread Starter

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    I came right over the weekend with my overflow and tank connector, I decided to take @[FONT=&quot]RiaanP[/FONT] advice this is what I did with some pic’s no more leak yippeeeee

    1. Parts used
    · 12cm running nipple
    · 2 backnuts
    · PVC weld
    · Marine silicon
    2. First I measured where the “wet” backnut should be on the nipple, and pc’s weld it to the running nipple, I waited about an hour or so for it to set a bit. (The reason for this is, when you fit the socket at the bottom it turns the nipple between the two backnuts)
    3. I sanded the wet backnut a bit with a fine sand paper to make some “hairs” stand-up to give it a better grip.
    4. I silicone the “wet” backnut and thread and fitted to the tank.
    5. I then used a rubber seal and backnut at the bottom to pull it all together.


    Below some pics’s, thank you all for the advice and help.
    [​IMG]

    [​IMG]

    [​IMG]
     
  15. leslie hempel

    leslie hempel Moderator MASA Contributor

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    nicley done....
     
  16. RiaanP

    RiaanP Moderator

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    Happiness is...
    a silent overflow.
     
  17. RiaanP

    RiaanP Moderator

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    just a question, did you dril a little 6mm hole on top of the durso / vent valve?
    Can fit an airline hose, short piece with a air valve to adjust the air flow.

    If there is no hole, you will find the water level in the overflow fluctuation between that level in the picture and the bottom rim of the valve. Then it will suck in air and rice again.
     
  18. RiaanP

    RiaanP Moderator

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    now, to get rid of the bubbles in the sump.

    [​IMG]

    Use 110mm toilet pipe PVC.
    with end cap. Cut hole for 50mm PVC to go through. No need to have a tight fit as you need the air to escape somewhere. Can drill 4 little 6mm holes around.

    The bottom of the 110mm pipe needs 2 cuts at 45 degrees. so Water can flow out. The downpipe should not go in more than a quarter. Nice big baffle. Bubbles stay inside.
    Problem solved.

    Enjoy the DIY
     
  19. RiaanP

    RiaanP Moderator

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    and lastly, replace the 90 degree bends with 45 degrees if you can. The horizontal piece should be slanted if you can. That will even make less noise. As from the durso at the top, to the sump exit point is actually a big drop. Having the water drop on the 90 degree, is still about half a meter or more (depends on your setup) and it is like water falling on a flat surface. A 45 degree angle does not generate the same amount of noise as a 90 degree.
     
  20. Clownfish9906

    Clownfish9906

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    Well done JDV

    I also used a tank connector but had one issue. The threaded connector from the tank connector to the pvc pipe had a leak. I used plumbers tape which reduced the leak.

    After speaking to the guys at Idol Marine, decided to drain the overflow box, let it dry and silicone it shut. I could have used pvc glue, but thats the only thing that will assist if I have to remove the piping at any stage...

    [​IMG]

    With enough silicone and drying time, the drip has stopped...:thumbup:
     
  21. JDV

    JDV Thread Starter

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    @[FONT=&quot]RiaanP[/FONT], Yip drilled the 6mm hole with a short piece of air hose and air valve woks great fun to see the water go up and down when adjusting it. “Nogal” Cool!
    Thanks for the great DIY Idea for the sump will try it,

    @Clownfish9906, lol I had the same problem lots and lots of thread tape fixed that and I had a small water leaking from the wet rubber one drip a minute or so, lol had a hard time getting them all stopped. But must admit was fun.
     
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