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A hydrothermal vent is a fissure on the seafloor from which geothermally heated water discharges. Hydrothermal vents are commonly found near volcanically active places, areas where tectonic plates are moving apart at spreading centers, ocean basins, and hotspots. Hydrothermal deposits are rocks and mineral ore deposits formed by the action of hydrothermal vents.
Hydrothermal vents exist because the earth is both geologically active and has large amounts of water on its surface and within its crust. Under the sea, hydrothermal vents may form features called black smokers or white smokers. Relative to the majority of the deep sea, the areas around submarine hydrothermal vents are biologically more productive, often hosting complex communities fueled by the chemicals dissolved in the vent fluids. Chemosynthetic bacteria and archaea form the base of the food chain, supporting diverse organisms, including giant tube worms, clams, limpets and shrimp. Active hydrothermal vents are thought to exist on Jupiter's moon Europa, and Saturn's moon Enceladus, and it is speculated that ancient hydrothermal vents once existed on Mars.

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  1. I

    Automatic air vent leaking

    Dear professionals, could someone kindly advise on per below issue, please let me know if more pictures or details needed. I think my Auto Air Vent is now leaking. A little background on the boiler – installed a year ago in Feb, Valiant Heat only boiler Eco Tec plus 424, plus new pump. The leak...
  2. S

    Hot pulling air through open vent.

    Hi, I'm new to the forum and just some background on myself. I have 4 years experience as a plumber but haven't worked in the trade in 15 years. I would say my overall knowledge is not great as I did most of the 4 years working on rinse and repeat estates of houses. I was also quite young and...
  3. C

    Unknown lead (?) Pipework to building exterior

    Hello all, I'm preparing an estimate for a bathroom renovation in a block of flats. As always I'm trying to flag up / plan for and cost as many possible unknowns as possible in advance. One thing that I've not seen before is the ~50mm pipework connecting into the soil stack (see picture). My...
  4. O

    venting question - using old empty outdoor SVP as air vent

    Hi all, I have an old toilet on the top floor (to be removed) which empties into an outdoor vertical SVP and into the ground. The pipe is straight with a vent terminal on top. Another toilet on the ground floor empties through the suspended timber floor into (what I suspect) a drain. I wish...
  5. M

    2 soil stacks 1 vent - will it work?

    Hi, I'm wondering if this is allowed or will work in the UK. We currently have all our waste water connecting to a single vented stack. The pipes from the toilets etc connect to the vertical stack via a horizontal pipe as you would expect. I'm about to renew all the soil pipes. We have 2 entry...
  6. H

    Can terraced houses share vent pipes?

    Hi all I am just after a bit of advice. I'm buying a new house with a downstairs bathroom. I can not see a vent pipe on the outside of the property or an AAV in the loft. It's a terraced house, so thought maybe it shares the neighbours vent stack? It look like all the waste pipes go down...
  7. Desktop987456

    Open vent DHW - calculate recovery time

    What would be the heating time for this (indirect) vented cylinder? Rated coil = 14kw Is it 96 litres x 4.2 specific weight x 40 (dT) ? How do I calculate the heating requirement of the boiler to heat this cylinder. Secondly, they are simpler to install as opposed to unvented type but what are...
  8. M

    Heating overflowing from vent

    Hi, I'm after some help regarding my Father in laws heating system. He has had a local engineer around but hasn't had a fix and is very remote so I'm looking at the issue before arranging someone to try to fix. He is on oil and has a modern raeburn boiler/range. He has a vented system with...
  9. paul72

    Soil vent in bedroom!!!

    I currently undertake a plethora of jobs for a client and they have states that they have an unpleasant smell emanating from their bedroom. On inspection there is a box section with 2 circular vents on each side where the horrendous odour is coming from. It looks like during construction of the...
  10. F

    Combined vent and cold feed

    Hi guys Is it normal for the cold feed pipe from the f&e tank to be combined with the open vent? The cold feed connects to a 22mm tee one end is the vent the other cold feed to rads I thought the vent connects to ch flow and the feed to ch return? Thanks in advance
  11. K

    vent pipe installation

    I am building a mother in law sweet i am having some trouble designing her septic and with decent venting. im attaching a basic diagram of her floor plan and would like to hear some ideas of how i need to vent this the ceiling will be cathedral so that will make this more difficult thank you
  12. N

    Two new open vent boilers, problems ever since.

    Hi all, So I re done my house 2/3 years ago and had all my radiators taken out on the lower floor, changed to wet underfloor instead. 2 zones. 2 manifolds. As I was doing quite a bit, I’d decided to exchange the two 15 year old boilers with a pair of new ones. Vitodens 100w 35kw open vent...
  13. J

    URGENT Vent pipe - how and where should it be positioned

    Hi, I would be grateful for any advice regarding regulations on installing vent pipe. My landlord has recently hired a handy man who installed a vent pipe for him but he installed it in a way that is it placed on the outside wall, only 50cm under our window (1st floor window). It feels to me...
  14. M

    Cylinder feed and vent

    Have a ground floor hot water cylinder, want to boost hot flow to upstairs bath with inline booster pump. Can't get to pipework near bath, so wondering if I create a new dedicated vent tee'd into pipe just after it leaves the cylinder, then install pump after new vent, and cap off old vent at...
  15. C

    Soil Vent Connection

    I have to connect the UPVC pipe to the ground. There's a connection of sorts there already. The rubber gasket there has perished but I don't seem to easily find a replacement. Even if I did, the old UPVC pipe I have doesn't fit tightly in there and presumably never did. My question is, does...
  16. bfalp1

    Is a soil vent mandatory?

    My builder has removed the soil vent pipe stating that an AAV would suffice. As I have had some troubles with them I have started to question what they say so I have done a bit of digging. From the internet I don't seem to find a clear answer about this. Could you please clarify this for me? Do...
  17. G

    SP140B vent pipe adaptor fitting

    Hi, ive recently purchased a Sp140b adaptor for cement pipe to 110mm plastic. When I've looked the vanes end is fine to put into cement pipe but where it has described the other end as push fit I was expecting to see some kind of o ring or seal for 110mm plastic pipe to slot into. Would I be...
  18. A

    Switching from Gravity to fully pumped - open vent position?

    Hi, Our gravity HW tank split and without a long delay the only one we could get was a fully pumped tank. Fairly easy replumb to get the tank in, however on all diagrams I've looked at, the fully pumped system has the open vent coming off between the boiler and the pump, whereas in our current...
  19. dave100

    Can I use 90 degree bends in dry soil vent?

    TL/DR: Can I have a bend of 90 degrees in the dry section of a 4-inch soil vent? Hi. I am renovating a small bathroom. There is an awkward part of the wall where the builders boxed off a large section just to conceal the 4-inch soil vent. I realise, of course, that the soil vent is essential to...
  20. M

    Vent from washing machine and double vanity

    Hey, just looking for a little feedback on the mock up I drew. I’m adding a washing machine and a double vanity to a 2” pipe I’ll have mounted into my main drain stack. For the vent off of the vanity, is it necessary? I’ve seen an “all hub 90” that would give me pipe to both vanities, but...
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