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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. J

    Vent pipe size for vented cylinder installed in 2005-6

    Hey, having searched this forum and last building regs (2000) from around that time... Any idea what the correct size is for a vent pipe for a vented hot water cylinder, gravity fed? I.e. the one that is continuously rising back up to the cold water feed tank for the cylinder? Have discovered...
  2. 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...
  3. C

    Kitchen sink drains slow with Oateys sure vent

    Okay I'm not a plumber and I have those aav Oateys sure vent 20 DFUs and my kitchen won't drain hardly at all now and when I remove it u can hear air rushing in an the water flows great,, now my kitchen an laundry room are close together and above the laundry I see a roof vent, idk what steps to...
  4. K

    Air Admittance Valve or Roof vent?

    Doing a split level custom build. The plumber wants to install AAV's on some of the lower level lines, a bathroom and a bar sink. There is a way to vent them normally through the roof, it's just more work for him. Which is better? The floor above hasn't been cast and a vent can come up through...
  5. 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...
  6. 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...
    • dave100
    • Thread
    • 90-degree america bends degree soil usa vent
    • Replies: 4
    • Forum: USA
  7. 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...
    • Marc m
    • Thread
    • america double machine usa vanity vent washing washing machine
    • Replies: 0
    • Forum: USA
  8. S

    Open vent Magnacleanse flushing

    Hi all. I have an open vented system with magnaclean filter installed at the return pipe close to boiler. I understand how the magnacleanse cleaning process works for my system but am wondering about flushing it out afterwards. Adey recommend connecting mains pressure with a pressure gauge at...
  9. P

    Spots recently ceiling downstairs, Condensation??? New water heater.

    Plumbing/water heater- spots recently on ceiling downstairs, 2 story house. Condensation??? New water heater. Live in same house now for 20 years but could happen anywhere. Got a new water heater in September on 2nd floor in a tiny closet. In that closet is a metal aluminum vent and also a...
    • peterac
    • Thread
    • ceiling condensation downstairs heater leak recently stain vent water water heater
    • Replies: 0
    • Forum: DIY Plumbing Forum
  10. C

    UFH manifold air vent dribbling

    Having recently replaced one of the flowmeters on our UFH manifold, why would water slowly dribble out of the air vent?
    • CygnusX1
    • Thread
    • air air vent america manifold ufh usa vent
    • Replies: 5
    • Forum: USA
  11. A

    Central heating refill valve and pressure relief vent

    Hi all, hoping you can advise on a couple of problems I need to resolve. Please see photo 1. Not sure why there are two valves (in series) to operate to feed water into the system and raise pressure, but the lower (first) valve leaks water while open. Initially a small dribble, but most...
    • AndyIrons
    • Thread
    • america central central heating central heating system heating pressure refill relief usa valve vent
    • Replies: 4
    • Forum: USA
  12. J

    Feed and vent in an f and e system

    Hi plumbing experts Can anyone tell me why a feed and vent are meant to be no more than 150mm apart as there teeing into system Thanks in advance Still learning the trade
    • Johnyc86
    • Thread
    • america system usa vent
    • Replies: 8
    • Forum: USA
  13. L

    Open vent system.

    Hi, just wondering if anyone could provide me with advice please on an issue I am having with my open vent system. I have recently installed 3 new rads and lost some circulation, when I went to the the loft a noticed that the cold feed was very hot, I have been told previously that header tank...
  14. S

    32mm Vent.

    I have a cloakroom toilet that isn't connected to an outside vent. It's been there 100 years and I don't think it has ever been vented. The floor and wooden paneling were rotten and I ripped them out a long time ago when we bought the house, without ever using that toilet so I don't know if it...
    • Simon Smith
    • Thread
    • america usa vent
    • Replies: 9
    • Forum: USA
  15. G

    Air vent screw help !!!

    Morning all I have main boiler could you tell me from the photo is the black screw suppose to be open or tightly closed don’t know what is best
    • Gibbo1471
    • Thread
    • air air vent america help screw usa vent
    • Replies: 2
    • Forum: USA
  16. A

    Do bottle traps need an air vent?

    Hi everyone, I am planning to renovate my small en-suite and to replace the current standard basin with a counter basin. I have some doubts regarding the trap, I didn't have the chance to remove the basin yet (it's full of sealant) but from what I can see from the camera of my phone, current...
    • ade
    • Thread
    • air air vent america bottle traps usa vent
    • Replies: 5
    • Forum: USA
  17. C

    Vent Pipe Blanked Off

    Would appreciate some advice I have a Potterton Suprima 60 Boiler system and a plumber doing a routine inspection of the system has stated in their opinion the system is not safe. This they have raised is due to no vent pipe being fitted to the F&E tank. Is anyone able to say if this information...
    • carl233
    • Thread
    • america pipe usa vent
    • Replies: 20
    • Forum: USA
  18. exedon2

    Oil fired aga combined feed and vent

    Re-boilering large property found existing 45kw oil boiler and oil aga shares same feed tank Aga is on a combined feed and vent My inclination is to change it thoughts?
  19. R

    Creating combined feed & vent

    Hi I have blocked cold feed into the central heating. I've tried system cleaner and using mains pressure but I cant shift the blockage. Unfortunately I can't cut out the blocked piece of pipe either as it's below the tiled kitchen floor. So the last option is can I combine the feed and vent...
  20. L

    Hi all, havnt been on site for ages. Got an issue with a vent pipe.

    I have plumbed a 2 bed bungalow, leaving out 1 1/2 wastes under concrete floor for shower and basin as part of first fix. I am now back on site for 2nd fix. The job is in the countryside so all waste goes to a septic tank. The builder ran all outside wastes which includes a 4 inch sewer pipe...
    • lattin
    • Thread
    • america issue pipe site usa vent
    • Replies: 7
    • Forum: USA
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