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A leak is a way (usually an opening) for fluid to escape a container or fluid-containing system, such as a tank or a ship's hull, through which the contents of the container can escape or outside matter can enter the container. Leaks are usually unintended and therefore undesired. The word leak usually refers to a gradual loss; a sudden loss is usually called a spill.
The matter leaking in or out can be gas, liquid, a highly viscous paste, or even a solid such as a powdered or granular solid or other solid particles.
Sometimes the word "leak" is used in a figurative sense. For example, in a news leak secret information becomes public.
According to ASTM D7053-17, water leakage is the passage of (liquid) water through a material or system designed to prevent passage of water.

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  1. B

    Leak in Ceiling - how much will it cost?

    There's a leak in the ceiling of my Dad's living room which is on the ground floor and has a bedroom directly above it. There's an in-ceiling speaker where water was dripping from, and there were slower drips coming from a...
  2. M

    Water under laminate

    Found water coming up from under laminate floor in new bathroom. Once leak found should the bathroom fitter lift up floor dry and replace floor to stop mould? Thanks
  3. L

    soilid fuel back boiler leak

    I can see the small leak in back boiler, have tried all sorts of products to seal it. have drained the radiators but pressure from water in actual and pipes boiler keeping it wet!! any ideas please to seal, its my only heating.
  4. RenzoPan

    Leak in the expansion vessel - can I keep the heating on?

    Hi, We have a leak in the expansion vessel, which is on the first floor, above the hot water cylinder. As we wait for a plumber, can we keep the heating on?
  5. K

    fix the connector leak to water pump - emersion heater

    hi all, i need help to fix the leak from a pipe connected to the water pump via flexi pipe and it is feed from the immersion heater. I have emptied the water tank in the loft and also closed the main stopcock. still the leak is on - hoping it will eventually stop. I have not idea how the...
  6. L

    Could this be causing backfill and intermittent moisture in my walls?

    Hi I need some advice as this has been ongoing since august and nobody can find a problem but meantime water is damaging my walls. The lady upstairs had a plumber in July who relocated her washbasin shower and fitted a new radiator.He caused a bad leak and came to fix it in august and I thought...
  7. A

    Compression fitting loose on the pipe

    Hi, I am replacing a leaking push fit flexi tap connector under the bath with a compression fitting flexi. The problem is that the old pipe seems to be slightly smaller than 22 mm compression fitting and when I tighten the compression nut the whole fitting is easily sliding off the pipe and...
  8. Clarky3225

    Can a gas leak detector help me?

    Hi sorry im a newbie, pls help if u can. I had a new bathroom installed about a yr ago and since then when i flush the toilet the room stinks of sewer gas. Not only does the b/room stink it also smells in the kitchen too, which is directly below the toilet/b-room. It doesnt do it everytime...
  9. 50Cent

    Tiny leak from heat exchanger

    Hi everyone, I have taken out the heat exchanger because a tiny leak was found around the red gasket at the top of the heat exchanger of a Worcester Green Star 28i Junior. The gasket itself is in perfect condition with no cracks. As you can see from the photo, the rust is near that holding...
  10. OneTwo

    Mystery Black Undergound Pipe Leak Repair Advice

    Hi All After having pooling water on my drive, I dug down around to find: Black pipe poly/plastic dug 450mm deep spraying water at mains pressure from small hole/crack The outside of pipe (measured with veneer caliper) at 23.5mm Pipe Runs under drive, along side of property and looks to go...
  11. DIYGraemeB24

    Toilet inlet pipe leak

    Afternoon all, It appears my toilet inlet pipe has developed a leak at on of the top 2 joints (between plastic pipe into toilet and between copper pipe with isolator screw) I'll attach pic. Just wondering what the fitting is that I need. Thanks, G
  12. H

    Bathtub odd leak from edge at end of tub

    Hello, the edge of the end of my bathtub leaks when I am about 3 minutes in the shower. The faucet is on the opposite side. What could be causing this? I had someone take a look at it today but could not figure out where the leak is coming from. The odd thing is there was no leak when we had...
  13. B

    Solar Thermal Fluid Leak

    Hello My solar thermal system appears to be leaking fluid (pics attached). Could anyone give me an indication of what the issue is likely to be and the potential cost to rectify? The system was installed in May 2021 and has a flat plate panel on the roof. It works very well generally and...
  14. C

    Unsure if I have an underground water pipe leak?

    I live in an ex local authority end terrace house. I am unsure if I have an underground leak from a water pipe? Scottish Water tell me they can't help as there is no loss of water pressure and it's beyond the pavement. The tarmac at both corners are often damp, the front corner looks like the...
  15. Zig168

    Leak in Airing Cupboard Tank

    The pipework around the hot water tank in the airing cupboard has developed several leaks after a chemical flush. It's an open vented system. Any ideas on controlling or fixing the leak? Should I turn off the red valve (pic 1) that has a leak next to it and rundown the hot water? Pic 2 a...
  16. PlumbingNewb

    Franke Davos handles

    Hi, I know nothing about plumbing 🤦‍♂️ and am trying to sort out a leaking kitchen tap. It's a Franke Davos 'J' Tap. I turned off the water to the sink and took off the screws at the end of the handles (also the spout, although that may not have been necessary). I thought the handles should just...
  17. B

    Leak on sink waste pipe

    A while ago I replaced a leaky, corroded sink trap. That all appears to be fine, I can't find any leaks with it, and everything under the sink appears to be consistently dry. The problem I have is that there appears to be a leak where the waste pipe out from the bottle trap meets the wall...
  18. K

    change my scalemaster magnetic scale inhibitor.

    I need to change my scalemaster magnetic scale inhibitor as it is leaking but I cannot work out how to take it off! I ordered a new one the same so I could see how it's fitted but have received a completely different one!! Help please
  19. T

    Stopcock turned tight but water still running upstairs. Help!

    Hi all, thank you so much in advance for any help. I’m always really grateful for the advice and support from experts when I have been on here a few years ago. There’s a dripping coming from my bathroom and I can hear it coming from behind the toilet and I’m worried it’s causing a buildup which...
  20. L

    Internal plastic pipes

    Hello Please could I have some advice. I recently had an new air source pump and hot water tank system installed. The pipes to the radiators are copper. However, there is plastic pipes to the taps for hot and cold water. I have found a leak in the connection of a plastic pipe. First...
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