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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. S

    Vent Pipe.

    Hi, Could someone please help me. The original vent section of he soil pipe ha been cut off and replaced with a bossed pipe. connected to this is a 50mm waste pipe from the basin and bath into the soil stack. This 50mm pipe also serves as the vent pipe for the system, going up the wall and...
  2. B

    Capping off a vent pipe

    F&E tank, big house, full of slime, vent capped off. Why would someone do that? Boiler wired up weird too, on HW, tank stat opens 2PV but doesn't turn boiler on, valve only wired to the stat. Any logic in this? Cable runs are easy, boiler directly below cylinder. Cheers
  3. R

    converting from open vent to sealed primary

    Hello folks, converting open vent system to sealed heating system (hot water to remain vented) - the boiler is fine to convert (glowworm ultimate), as is cylinder. I know it needs expansion vessel, safety valve, gauge, filling loop etc. Initial query: can the safety valve go in the airing...
  4. S

    Bunging the cold feed and vent

    Whats the point of this when you want to change a rad and re-pipe? All it does is hold the water in the f and e tank. The existing rad pipework drains anyway with the pipework under the floor and when re-filling the system if there is any carp in there this will still drop into the pipework...
  5. S

    external air admittance vent

    Hi, Can I use an external air admittance vent, such a floplast, inside. To me the inside and outside one are very similar except for the protection that outside one has around the vent. Many thanks Seb
  6. D

    F+E tank with no vent

    hi i was just wondering if this is normal or it it was a mistake. the F+E tank never had a vent on it, we drained it down and it took 2 hours to get up and running. some of the air was coming though the cold feed to the primaries to the tank. I've had a look though my college books but can't...
  7. A

    feed and expansion tank but no vent??

    Hi fellas, At a house yesterday - had to drain down central heating system ( oil fired ) , to replace circ pump/ pump valves and 2 port valve. After refilling system had a serious problem getting heat into the downstairs rads - it was when trying to clear a poss air lock that I discovered...
  8. S

    Reverse auto air vent devise?

    Is there a devise that can be attached to a fixed ceiling shower head to allow the water to drain out once the shower has finished being used. There is pipework in the loft that we can attach a devise to. Im in thinking something that's a reverse of an auto air vent. Or a durgo. Does such...
  9. D

    Vent or no vent for additional bathroom

    Hi there, Looking to get more advice as a couple of plumbers I called I told e different things and i want o get it right. I am adding a ensuite to a room and was planning to get it connected to the existing main drain running along the back of the house (where existing bathroom and cast-iron...
  10. J

    Circulations problems on a upland open vent system

    Turning into a bit of a ballache... had everywhere roasting, couple of hours latter downstairs living room rad goes cold an a bedroom one.. had hose on drain offs, throttled lock shields right down on upstairs, trvs off on rads an at times it gets hot, then stops... it has x400 in system to...
  11. D

    Increase Wall Vent Dia

    Hi all, I have about 120mm dia (four and a half inch) circular vent hole in my kitchen wall. The issue I am faced with is that Most of the vent kits are either 100mm, 125mm or 150m. The vent is for extractor hood. Manufacturer recommend min 120m but prefer 150mm for maximum extraction. What...
  12. S

    sewage vent in bathroom

    Hi, I recently bought a flat in a building block built 15 years ago. Since I moved in there has been a smell of sewage. After putting silicon on pipes connection the smell was still there. I finally (after making a hole in one of the walls) discovered that the sewage vent was behind this wall...
  13. E

    Zip hydroboil vent pipe

    Hi all, I have a few of these to fit next week. What's the best way to do the vent pipe? Spec says copper pipe via tundish , so should the tundish be copper?. Original plan as a Mc Alpine tundish and overflow pipe. Any thoughts? Thanks
  14. A

    how to split the soil vent pipe add a new toilet piece and make good

    a bit later on in the year i will be installing a on suite on the main bedroom and will have to pull apart the soil pipe to add in another hole a bit lower down and run a pipe across the down stairs ceiling in the middle of the house to the existing stack how do you pull the pipe apart with...
  15. R

    Replacing an AA vent (tips?)

    Hi guys, new to the forums! Need to replace an AA vent, got an identical. Now, I've read that you can unscrew it and put the new one on (via that adapter/shut off device when you unscrew it), but I'm being prepared for the worst and was just curious if theres any other tips on what I could do...
  16. B

    broken air vent in rad

    Hi all. Just new to this site Was wondering is there any way of fixing a broken air vent in a radiator . can you buy a kit or anything? The vent is quite small at the back of the radiator. thanks
  17. Deleted member 32524

    open vent boiler mate 2000

    Hello, Boiler not getting a sl from this boiler mate and not firing. Never seen one before boiler mate 2000 that is. It looks like the boiler gets a switched live from there but there is no voltage on the sl at the boiler mate. Every other connection has power when it should. All the lights...
  18. M

    Auto air vent question

    For years I've had the following auto air vent in the airing cupboard. It tends to weep when set to the open position and so today I've fitted this Honeywell EA122 jobby. It vented automatically as it should when refilling the system but with a manual vent I was able to shift more stubborn...
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