If you don't care it being a little flimsy and just want quick, and the plastic is not too brittle:
Use a barbed fitting with a straight thread on the outside, e.g. #10-32 of M5x.8 (these sizes happen to be interchangable), and a sealant.
drill 4.2mm (work up size in small increments to avoid cracking)
tap hole M5x.8 (or #10-32) (with great care, ...
If you don't want to drill a hole on the box and mess around with nozzles and sealants, a solution would be to siphon water like
The only difference is that that valve is going to be at the bottom side.
The only "problem" is that you need to fill the hose. A common solution to that is
The pressure at the depth of 100m is:
$$p=\rho*h=100*1024=102400kg/m^2=10.24atm$$ Assuming 1 atm pressure inside the cabine.
As per Roark’s Formulas for Stress and Strain
WARREN C. YOUNG
RICHARD G. BUDYNAS Seventh Ed. pp 502 ch. 11 table 11.4, for a square plate with free edge supports.
$\beta=0.2874 \ for\ square$
$q=pressure, \ p $
$t=thickness,\ \alpha= ...
I'd recommend first making a hole to fill the channels in the brick with mortar/concrete locally. This way you will effectively have a solid brick which allows for a much stronger fastening and a much larger range of applicable anchors.
The anchors you show above are all mechanical anchors, which is not the optimal solution when a waterproof result is ...
Pure weight test before and after may not be accurate as the enclosure may have absorbed some water without it entering. Apply dye around areas where ingress is possible, if it washed away there has been ingress. Depending on the volume/internal geometry of your enclosure a visual inspection is generally acceptable for IP ratings in my experience.
I believe what you are describing is a not-uncommon item in process industry and is often simply referred to as a rotary joint or rotary union. These rotary joints can be configured many different ways, but they are often utilized for rotating pieces of equipment such as Rotary Steam Tube Driers (RSTDs) that rotate while needing to be supplied with steam and ...
They can be flush, but do not have to be*. At least for smaller sizes, flush is typical, because it ensures control of tolerances of the interference and compression (squeeze %). The groove has excess width that provides empty volume into which the o-ring material displaced by the interference can go.
[*] note: In case of high pressures, extrusion of the o-...
Tunnel linings come in a wide variety of materials and functions.
Some are just finishing precast panels covering the tunnel structure which could be an elaborate system of tie-back wires, steel frames, shotcrete.
Some are actually part of the structure, but generally not the waterproofing.
Here is a link to the design concern guide.