Attaching a Fitting to a Through-Hole?

Discussion in 'Water Cooling' started by Zarathustra[H], May 17, 2018.

  1. Zarathustra[H]

    Zarathustra[H] Pick your own.....you deserve it.

    Messages:
    24,624
    Joined:
    Oct 29, 2000
    Hey all,

    Back in the day it was fairly commonplace to repurpose and DIY parts to use in water loops, but this really isn't the case anymore.

    For an upcoming potential project I am considering DIY:ing my own reservoir out of a glass container.

    The container has a small hole near the bottom large enough for the purpose. How would I go about attaching a fitting to the hole?

    I've seen many so called "bulkhead fittings" but they don't seem to be designed to form a water-tight barrier around the hole in which they are inserted, just to be attached panel mount style and have a G1/4 BSP thread on either side.

    Would it be a good idea to use one of these bulkhead fittings and my own 3rd party rubber o-ring to make a seal and create the reservoir, or are there better solutions out there?

    Appreciate any suggestions!
     
  2. H2R2P2

    H2R2P2 Limp Gawd

    Messages:
    293
    Joined:
    Jun 18, 2006
  3. pendragon1

    pendragon1 [H]ardForum Junkie

    Messages:
    9,945
    Joined:
    Oct 7, 2000
  4. guitarslingerchris

    guitarslingerchris Failure is just success rounded down

    Messages:
    6,416
    Joined:
    Oct 29, 2004
    I always assumed if one did this you would be using an epoxy resin of some kind to glue and seal the fitting.
     
    hazexban likes this.
  5. pendragon1

    pendragon1 [H]ardForum Junkie

    Messages:
    9,945
    Joined:
    Oct 7, 2000
    that's another way too.
     
  6. Zarathustra[H]

    Zarathustra[H] Pick your own.....you deserve it.

    Messages:
    24,624
    Joined:
    Oct 29, 2000

    The glass is pretty thick. I'm planning on using a small "beverage dispenser" and removing the spout.

    I wanted to use PC cooling parts as much as possible in order to avoid the need for adapters, and to avoid metal compatibility issues. Stainless steel may lead to galvanic corrosion in a loop with copper.


    That one looks pretty nice, the 16.5mm hole size, and max extension of 12.5mm may be a problem as the glass may be too thick, and I think the hole is 3/4" wide. I can make a hole larger (dremel grinding tip works on glass, right?), but it is pretty difficult to make a hole smaller.


    Alphacool sells this one which has a rubber o-ring on one side:

    https://www.performance-pcs.com/alphacool-bulkhead-connector-short-version-g1-4-chrome.html

    It looks like the thread would be too short for me though. They call this the "short version" which suggests there would be a long version as well, but the only long version I can find is this one, and it looks to be of a different design.

    https://www.amazon.com/Alphacool-Bulkhead-Fitting-Deep-Black/dp/B004X7ZUK6

    I can't seem to tell if there are any o-rings on there as its so dark in the image. It looks long enough though, and firs a 19-5mm to 22.5mm hole. 3/4" is approximately 19mm, so if I just kiss the inside of the hole with my dremel, it should become large enough for this one.

    If there aren't o-rings, I wonder if I could just add my own. Not sure if that would seal tightly.
     
  7. guitarslingerchris

    guitarslingerchris Failure is just success rounded down

    Messages:
    6,416
    Joined:
    Oct 29, 2004
    That looks identical to the Barrow bulkhead fittings I ordered for my external rad ITX build and they aren't meant to seal just tighten down.
     
  8. pendragon1

    pendragon1 [H]ardForum Junkie

    Messages:
    9,945
    Joined:
    Oct 7, 2000
    doesn't look like there are orings on the deep one. you could epoxy that one in place and the screw on pieces will cover it. otherwise there needs to be a big gasket to seal it, not sure a single little oring would be good enough.
     
  9. termite

    termite [H]ardness Supreme

    Messages:
    4,495
    Joined:
    Aug 27, 2004

    There will not be any galvanic reaction between copper and stainless steel.

    I have never seen a water cooling specific water tight bulkhead fitting that was tailored to water cooling. They are always designed for passing through a case wall or whatever, using the oring on the fittings to provide the water proofing.

    You "may" be able to use a longer watercooling specific bulkhead fitting and sandwich washers and orings between them to form a seal.

    Bulkhead flange - > SS washer - > Oring - > glass jar wall - > oring -> SS washer - > bulkhead screw ring.

    You may be able to epoxy one side, but glass is unforgiving with adhesives, so your joint would be extremely fragile, and a small bump could pop the epoxy off of the glass.

    The bulkhead threaded outside diameter would need to be just smaller then the hole it needs to pass through though. The "no weld" kettle bulkheads for home brewing beer work the exact same way.

    You stated that your passthrough hole is 3/4 and the XSPC bulkhead has a 16.5mm hole requirements so you may be ok, as the hole you already have is only about 3mm to big.

    Personally I would find another container.
     
  10. Zarathustra[H]

    Zarathustra[H] Pick your own.....you deserve it.

    Messages:
    24,624
    Joined:
    Oct 29, 2000

    I appreciate the response.

    Unfortunately I've had to kill off this project before it even started.

    I was planning on running tubing down to the basement, and putting water chillers down there for a completely silent office, but something has come up, and now I'm going to have to move sooner than I expected, so it makes no sense to do any custom setups in this house.

    It's a shame, but it is what it is.
     
  11. trick0502

    trick0502 [H]ardness Supreme

    Messages:
    5,060
    Joined:
    Apr 17, 2006
    great thread title
     
  12. noxqzs

    noxqzs [H]Lite

    Messages:
    110
    Joined:
    Aug 2, 2013
    You most likely have an o-ring on the waterblock and one on the pump, I don't see why you couldn't use one on the reservoir. With careful planning and assembly I think making one yourself is possible.