Installing Bulkhead Tips

Discussion in 'General Equipment, Hardware, Filtration' started by AZDesertRat, Jan 10, 2010.

  1. Salty Dog

    Salty Dog Well-Known Member

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    I use Hayward bulkheads, there supper strong . I tighten them down with two pairs of channel locks. Never had a drop of water and Im using three hammerhead pumps
     

  2. Bullitt3478

    Bullitt3478 Member

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    I am installing bulk heads, tank is three months old and the previous owner had a gasket on flange and glass sides. Are both gaskets needed? I have one that keeps dripping ever so slightly and can't get it to stop. Surfaces look good on gaskets and flanges. These bulkheads are going in the bottom of the tank where the corner overflow box had been cut out. So they are permanent and can't be tinkered with without draining 80 gallons of water onto the floor....
     
  3. vetteguy53081

    vetteguy53081 Well-Known Member

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    The inside gasket is the most important. Mine has double and I had to Tighten the daylights out of it. The other has a single on the inside and only needed to be snugged.
     
  4. AZDesertRat

    AZDesertRat Well-Known Member R2R Supporter R2R Excellence Award

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    You only need a gasket on the flange side of the bulkhead, regardless of if the flange is on the wet side or the dry side, it always goes against the flange not the nut. Only one gasket is required and I would not add the second as it could hinder tightening the jamb nut properly.

    Its not inside and outside as a bulkhead can be installed either direction depending on the application. It is flange side and nut side and the gasket always goes against the flange side even if you install the nut inside the sump or tank and the flange on the outside.
     
  5. Engloid

    Engloid Well-Known Member VRJ Member

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    Agreed. I dont know that I worded it as well as you did.

    In addition, a gasket on the nut side makes it more difficult to tighten the nut because of increased friction.
     
  6. mudbucket72

    mudbucket72 Well-Known Member

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    Great info this will help when I put new bulkhead s on my new setup
     
  7. EpicWin

    EpicWin Well-Known Member

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    Which is the flange and which Is the nut?
     
  8. AZDesertRat

    AZDesertRat Well-Known Member R2R Supporter R2R Excellence Award

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    Just like a bolt, the nut screws on and the flange is the flat surface under the head of the bolt. With a bulkhead, the gasket is always on the flat or flanged surface, never on the screw on or nut surface.
     
    120reefkeeper likes this.
  9. Engloid

    Engloid Well-Known Member VRJ Member

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    Correct. You dont want the nut spinning against the gasket. You want the gasked squeezed betewwn the flange and tank glass.
     
  10. EpicWin

    EpicWin Well-Known Member

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    Wow! You solved my problem!!!!! Ty!!!!
     
  11. fernalfer

    fernalfer Well-Known Member CTARS Member

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    I have dual overflows so 2- 3/4 inch bulkheads and 2- 1 inch bulkheads. They are thread on bulkhead side and slip out to the sump. I'm using 4 of these fitting to screw into the bulkhead. Not this brand but same fitting: http://www.amazon.com/Genova-Products-30407CP-4-Inch-Adapter/dp/B000BQNEI8

    Now the 2 3/4 inch fitting screw all the way into the bulkhead dry but the 2 1 inch fittings do not. Do you think after adding the thread sealant to the threads it may act as a lubricant and the PVC fitting will then screw all the way in? Or should i be concerned if it doesn't? Right now i can screw it in about 3/4 of the way.
     
  12. AZDesertRat

    AZDesertRat Well-Known Member R2R Supporter R2R Excellence Award

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    PVC male adapters have a tapered pipe thread so get tighter as they screw in further. If the 3/4" screw all the way in without any force or assistance I would be concered about a good seal, they should tighten up and not bottom out. Sounds like the 1" are a good fit though.
    The LaCo will make the fittings screw in easier while providing a good seal. Make sure to clean out the threads real well so it does not scoop the sealant out as the thread them on.
     
  13. revhtree

    revhtree Owner Administrator Staff Member Team R2R R2R Supporter R2R Excellence Award Photo of the Month Award Build Thread Contributor Article Contributor Partner Member 2018

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    Great thread!
     
  14. fernalfer

    fernalfer Well-Known Member CTARS Member

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    Any tips on the best way to clean out the threads? And yes the 3/4 fittings do screw in fairly easy.
     
  15. AZDesertRat

    AZDesertRat Well-Known Member R2R Supporter R2R Excellence Award

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    The first couple posts in this thread talk about how to clean up the threads and smooth off the flat gasketed surfaces so they seal well.
     
  16. no fish anywhere

    no fish anywhere New Member

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    Its been six years and you are still helping people in this thread. Thats awesome. I am building a paludarium with an overflow box at the bottom of the tank because the water level will be only 5-6 inches deep. The bulkhead i need to install will go through this set of materials...

    Internal overflow box : tank glass : spacer/gasket : external overflow box

    The internal overflow box requires that the bulkheads flange be inside itself. The external overflow box is so low that it hangs below the tank itself and therefore needs some type of spacer or gasket to ovoid it from sitting crooked against the black trim at the bottom of the tank.

    My question is where do i need to put my gaskets so that i can avoid leaks? I have labeled the locations in red numbers and #3 is where a gasket/spacer is required.

    [​IMG]
     
  17. cb684

    cb684 Well-Known Member R2R Supporter

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    Anywhere you have water against the bulkhead. So, 1 and 4.
     
  18. jsker

    jsker Reefing is all about the adventure R2R Supporter R2R Excellence Award Reef Squad Leader Build Thread Contributor Article Contributor Partner Member 2018

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    The way I am looking at it is there is water in 1-2 and 4 then you would need a bulkhead gasket in those areas having pressure against the gaskets. You would also need a space were 3 is so the in no stress on the tank glass and what ever 4 is made out of. the spacer would also help with be able to put tension/pressure when you tighten down the bulkhead nut.
     
  19. fragit

    fragit Well-Known Member Build Thread Contributor

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    I have ABS bulk heads from BRS they are slip fittings. What kind of glue do I use to glue in my pvc pipe the goes to my return pump? Is there and ABS to PVC glue you would recommend?
     
  20. no fish anywhere

    no fish anywhere New Member

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    Thank you for your help guys. I have redesigned plans for the external glass box to avoid it hanging below the tanks trim. With your comments i assume i will therefore need a gasket at locations 1, 2 and 4. Is this correct?
     
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