Questions tagged [waterproofing]

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7 votes
4 answers
3k views

How did this building's windows get like this?

I don't recall seeing the walls like this before, so I don't think it's just accumulated soilage. If it's wetness, what design flaw causes the windows to do that? Today was very hot and muggy so it's ...
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0 votes
2 answers
68 views

Waterlogged multistorey apartment

I fraction invested in a real estate project several years back. Mid way through the construction, after about 12 floors, the building contractor filed for bankruptcy. An asset reconstruction company ...
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1 vote
3 answers
84 views

Achieve mechanically water tight snap-in-place joint

I'm not sure how to ask it but i'll try I want to 3d-print 2 half spheres with a screw cap that then can be clipped once (can't un-clip later) And can be filled with water (lets say its food safe, i'...
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0 answers
32 views

Brainstorming ways to water seal a submarine with a protruding instrument?

I am currently working on a submarine that has a flat face at one end made of 1/2" acrylic. Currently, there is a 12mm glass sensor that protrudes through a hole in the acrylic face and I am ...
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  • 1
0 votes
3 answers
349 views

Are mechanical pocket watches inherently water-proof and last "forever"?

Recently, I bought a cheap (~$53) but elegant mechanical "retro pocket watch", newly made. That is, not an antique made in the 18th century or anything. So far, it's worked flawlessly and ...
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2 votes
2 answers
60 views

Do PVC concrete joint water stops degrade over time? Or were they never installed correctly?

A UK subterranean reinforced concrete structure built in the late 1960s has experienced sustained water ingress over time as shown by the deposition of minerals of the walls: According to the ...
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3 votes
2 answers
872 views

How do I connect a 3mm water tube to a plastic box?

I need to connect a 3mm inside-diameter tube from a solenoid valve to a plastic box. The box wall thickness is 4.5mm. The purpose is to empty water in the box when needed. How should I connect it so ...
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  • 41
0 votes
1 answer
161 views

How to have a watertight or airtight pipe seal that is rotating at a radius, with a stationary junction tube?

How would I have a watertight or airtight pipe that is rotating at a radius, if the main reservoir pipe is not? Since I'm pretty sure I didn't do a good job of describing what I mean, the image above ...
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1 vote
1 answer
30 views

What tests are made in an Ingress Protection to verify that no water entered the enclosure?

I am asking this question on what tests are made to to verify that no water has penetrated the waterproof enclosure during an Ingress Protection test. I have researched tests online and most often ...
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  • 111
0 votes
4 answers
87 views

When using an o-ring as a face seal, are the faces flush together?

I'm using an o-ring in a face seal, external pressure configuration as a seal between two metal parts. Are the two faces being compressed and sealed going to be flush together or will there be a gap ...
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0 votes
1 answer
74 views

What is the best way to fasten securely a load onto a hollow brick?

Due to the ongoing COVID pandemic, I decided to put a basketball hoop on one of our outside walls, so that me and my son can stretch a bit. The problem is that the wall I plan to put the basketball is ...
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0 answers
35 views

IP grade for specific plastic case

I´m designing an access control device and I need to place it in a plastic case so it can be easily installed on a wall, for example. Also, the PCB will have a special coating for humidity protection. ...
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0 votes
1 answer
46 views

Tunnel lining vs structural support

Is tunnel lining the same thing as tunnel structural support? And then also there is always the initial and final lining? Are three all different things? And how do they relate to waterproofing? It ...
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2 votes
1 answer
79 views

Calculate thickness of a 1 square meter window made of acrylic in a submarine to endure 100meters

This question would have two parts: 1 - How to calculate thickness of a 1 square meter window made of acrylic in a submarine to endure 100meters of deepness in salt water? I don't remember the ...
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3 votes
0 answers
45 views

water leak through subterranean cable penetrations in concrete

See the image below for the detail of 4 no. cable ducts that run from a trench in a raft foundation (on the left) through an approximately 1 m square penetration in the raft foundation, through soil (...
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1 vote
0 answers
25 views

I want to test non woven fabrics to see if they are polypropylene, the lining material of N95 masks

A group of us are sewing face masks to prevent the spread of sputum. I've learned that the lining of an N95 mask is made of polypropylene. Polypropylene is also a common interfacing product for ...
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0 votes
1 answer
232 views

How to properly fit almuminum glass window without leakage?

I got a brick-wall house. The wall is 25cm thick. I want to add windows. There are 2 ways of adding a window: Adding the window on the inside side of the wall, so that if the aluminium frame of ...
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3 votes
1 answer
82 views

How are water-tight transmissions made, like the kind you see on inboard boats, pumps or food blenders?

I want to replicate the kind of interface you see on inboard boats, pumps, or food blenders. Basically, I want put a motor in a sealed vessel, and have it turn a prop outside the vessel, in water. ...
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  • 33
0 votes
1 answer
78 views

How to rotate the blade?

I have developed a design for a river cleaning machine which can cut and collect weeds. The problem which is facing is how to rotate the circular blade which is attached in front of the machine. I ...
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2 votes
0 answers
45 views

Is there any software for testing cad model waterproofing and isolation?

I have a cad model of a plastic box that is made of two parts. Two parts are connected with resin isolation. I want to test if my part is at least in theory ip86 water-resistant. So is there any ...
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  • 129
1 vote
1 answer
55 views

Hermetic Cable Seal With Space Limitations

I have an application wherein I need a hermetic seal at cable exit points from a plastic housing. The cables are not removable. I'd like to achieve this seal using the plastic housing itself by ...
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  • 13
2 votes
1 answer
50 views

Waterproof Pan control/bearing/mechanism

Please bear with me - I'm not an engineer, I'm a software developer so lack the language / knowledge to describe what I want precisely. I'm controlling a servo to rotate /pan a platform to hold a ...
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  • 121
2 votes
3 answers
85 views

What type of stainless steels can resist 6 months under the sea?

Resist means without catastrophic corrosion here. We assume that there is no coating or anodic protection. The steel can be mirror polished and passivated. To make it more difficult, the shape is not ...
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  • 161
0 votes
2 answers
45 views

How deep would a water bottle have to be submerged in the sea to burst? [closed]

Assume the water bottle is the most sturdily built standard water bottle one could acquire in an american supermarket. This is the first question I've asked, so I'm sorry if I'm not in the right ...
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  • 1
0 votes
1 answer
71 views

Can we rotate the given white wheel?

When the box is upside down and filled with water, is it possible to rotate the white wheel freely without water being leakage by any method or any existing technology? White is wheel and green is ...
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2 votes
2 answers
2k views

Sealing a rotating shaft in a 3D-printed part

I need to seal a rotating shaft that protrudes through a wall in a 3D-printed enclosure I am designing for a school project. The enclosure is for what will be a small generator that will be used in ...
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0 votes
3 answers
74 views

Microphone angled waterproofing

We are working on a mounted screen design that will have microphones at the bottom of the screen housing. The screen housing will be sitting at a 10.5 degree angle. So we are worried about water ...
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1 vote
2 answers
2k views

Material thickness to withstand Pressure

Let's say I have a Sphere made out of Acrylic, with a diameter d meters. And I want to submerge it down in the ocean. The depth is such that it reaches up to ...
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  • 53
0 votes
1 answer
141 views

O-ring compressive force

Is there formula to calculate the compressive force required to achieve x% of squeeze in an O-ring? I have referred the Parker O-ring and Apple Rubber Handbooks, but they provide just approximations. ...
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0 votes
1 answer
2k views

O-Ring Selection for a round rectangle groove

I'm designing a water proof case for a power bank to be used in an occasional underwater condition. The input and out put port components already have a gasket or sealing ring. Now to close the case I ...
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  • 3
1 vote
3 answers
71 views

Transmission of rotational power across a waterproof boundary [closed]

Considering the situation where: A non-waterproof motor is used inside a waterproof box Something must be rotated by that motor in a wet environment outside the box What is the correct way to ...
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1 vote
2 answers
491 views

How to water seal a metal plate into the wall of a plastic water tank?

I have a 10 x 10cm square plate of metal I would like to insert into a hole in the wall of plastic water tank (cube shape), I'm planning on 3D printing the tank itself (only 1-2 litres). What would ...
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  • 13
3 votes
1 answer
104 views

How wasn't Thames Tunnel flooded during construction?

I have read the Brunel's shield directly exposed ground which was then excavated by the workers. But the construction was done just a few meters under the seabed. How wasn't the tunnel flooded ...
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  • 131
1 vote
0 answers
803 views

In the Panama Canal, how are the lock gates kept water-tight (at the hinges, middle, and bottom)?

The Panama Canal has these huge gates. They close so the locks can be flooded or drained. They're swing gates, so 3 questions come to mind: How are they water-tight at the hinges? How are they water-...
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  • 495
4 votes
1 answer
190 views

Waterproof Case Time Limits

Some cell phone cases have a waterproof rating of IP-68, often specifying that they can tolerate immersion to 6 feet for 30 minutes or 3 feet for 60 minutes. My understanding, however, is that a good ...
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  • 201
3 votes
2 answers
603 views

Why does epoxy resin become opaque after long exposure to water and LED lamps?

I want to put LED lamps in water. Up until now I used epoxy glass for its isolation, but after one year it starts to become opaque and lose its clearness. What causes the epoxy glass to cloud and ...
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6 votes
2 answers
2k views

Can I seal the inside of a water well to use it as water reservoir when the well is dry?

We've had unusually dry weather and our well has run so low that we had to call in a water hauling company to refill it a few days ago. The water man told me that even though he dumped in ~ 1000 ...
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4 votes
2 answers
182 views

Thermoplastics that are permeable to water - high diffusion coefficient

I want to know if there are some fairly common thermoplastics that allow water to pass through (by diffusion) at a relatively high rate (on the order of days). For example, PET water bottles leak ...
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  • 291
7 votes
4 answers
2k views

What are the common failure points of waterproof cases?

I am making a waterproof case for my Galaxy S5 and/or my Raspberry Pi. I plan to make the main body from (or at least decorate it with) wood, though I can use other, stronger materials where needed. ...
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