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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. U

    Anyway to bung an automatic air vent?

    I've noticed the automatic air vent on the top part of my boiler is leaking. Here's a photo: http://i.*********/Elb7Xqo.jpg It's in a position that would be bugger to replace so I'd rather not have to deal with getting it sorted right now, and I was hoping there would be a cap on it to close...
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    • air air vent anyway automatic close please register sorted vent
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  2. I

    Internal Soil Vent

    Hi - I have just finished ripping out our bathroom prior to a refit. I will being getting a professional plumber in etc. to do the work required but just wondering if anyone could advise to help with the planning of the new bathroom. In the corner we have an internal soil pipe with an AAV. This...
  3. G

    converting open vent to sealed

    one of my jobs tomorrow to remove existing f & e and change to sealed system. MI's state they like the vessel fitted on negative side of pump (flow), but i was wanting to fit to return (no valves or restrictions) just wondered why they would state on flow rather than return as i thought less...
  4. R

    Soil and Vent pipes and Basement Flats

    Just installing a bathroom in a basement flat. Kitchen, bath, basin and toilet waste are all to go down single underground drainage pipe which then connects to the underground drainage from rest of property above, then runs to sewer under garden. Would the basement flat be ok if we installed a...
  5. Inverness

    To seperater vent pipes in the one cold water cistern in the loft.

    Went to a old farm house today there heating and hot water is open vented. I had a look inside there loft and I noticed the feed and expansion cistern was redundant and beside it is a larger cold water cistern with two vent pipes going into it. Wouldn't the central heating water contaminated...
  6. J

    Re-routing vent pipe for condensing boiler

    Please advise me! We are building a conservatory but have a Worcester Bosch condensing boiler vent pipe where one of the walls will be. Is it possible to put a 90 degree angled pipe on it and re-route it through the new wall? How long can a vent pipe be? Thanks, Julie
  7. Riley

    Air vent query

    Morning all I hope you've all recovered from the Christmas excesses I have been going over to see a little old lady and servicing her open vented boiler for the last four or five years now. Ventilation has always been spot on and the boiler works really well because it's been serviced...
  8. P

    S Plan Vent Feed Options

    Please see attached diagrams.Please let me know what you think. Phillip Capron.
  9. A

    No vent pipe over f + e

    Got sent to a job couple of days ago, first time I have had a chance to post about it. the customer has a few aqualisa showers in the property, up in the loft has the blending/pump type things. i got sent out because the showers were not switching off, we don't deal with them and Cust said...
  10. B

    vaillant ecotec 418 erp (open vent)

    how the hell do you get it to run on max & min ? - (instructions are a load of rubbish) Spent nearly 40 mins waiting for their tech line to answer then gave up.
  11. A

    Best open vent boiler?

    I've had a couple of quotes so far and been given a variety of choices that I'm looking through but is there a stand out choice? One installer recommended a WB because pipework can be hung below the boiler and that would considerably ease the installation given the limited location, are WB the...
  12. T

    Relocating Rainwater Vent Pipe Trap - Building Standards

    (Apologies for the double post. I originally posted this in the Valves & Taps section but I dont think that was correct) Hello I am currently assisting with the renovation of a medium sized house which involves converting the existing kitchen area into a new bathroom (Kitchen is being...
  13. T

    Relocating Rainwater Vent Pipe Trap - Building Standards

    Hello I am currently assisting with the renovation of a medium sized house which involves converting the existing kitchen area into a new bathroom (Kitchen is being relocated to the existing dining area). Building standards have sent me a drainage record of the house from 1955 which...
  14. C

    feed and vent pipework improvements

    hi, i've had someone look at my heating system recently and he wants to combine the feed and vent pipes to help eliminate the air and other problems i have been experiencing over the last year following a boiler and pump upgrade. he also wants to remove the vent. arm above the F and E tank which...
  15. J

    Auto air vent placement

    If anyone can give me pointers I'd be most grateful. I have flow and return coming in at the floor level in one corner of a room that rises to ceiling level runs around three walls and drops to the ufh manifold. It is drained at the moment but when I refill Id like to have done the most I can...
  16. S

    HW Vent pipe

    hello, can the hw vent pipe basically come across the top of the cwsc and then angle back in at the top? Roughly about 30mm above the top of the cistern. All the other ones I have seen come way over in an elaborate way then back in. I have looked through all the plumbing books I have nvq etc...
  17. Robert Tyrrell

    Vent sizing tool

    I've seen these things used by others to gauge the size of an existing free air vent and I wondered if any of you know where I could get one as I can't find them on the net? As far as I can remember, it looks like a piece of stepped rod with each 'step' being a different diameter in mm.
  18. M

    reducing down for soil vent

    With an internal stack that needs venting through the roof, it is usual to reduce down after the last 4inch branch in the pipe that goes in an upstairs toilet. What size do you usually reduce down to to take the soil pipe out through the roof? Think I have seen 3inch before do the readily sell...
  19. B

    Auto air vent tool

    Real help on isars
  20. Chalked

    Open vent boiler

    Usually fit vaillants, but need to replace a large floor standing boiler in a cellar. Looking at two 24 kW heat only. Don't want to pressurise it, as its a mixture of old and new rads and pipework. never been happy with open vent Vaillant. So can someone recommend me another manufacturer?
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