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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. 8

    Help! How water cyclinder open vent pipe

    I have an issue where the HWC (Hot Water Cyclinder) open vent pipe is dripping occasionally into the CWSC (Cold Water Storage Cistern) in the loft. Which is causing the overflow from the CWSC to drip. The HWC Stat temp was sent to 55 degrees. I have turned down the temp for the heating...
  2. S

    Boiler 'At Risk' due to flue being next to extractor vent - options to resolve?

    Hi All My boiler was deemed 'At Risk' by a British Gas engineer yesterday due to the external flue being located next to the oven extractor fan outlet. Previous engineers deemed this 'Not to current standards', but the opinion of this engineer was different. The boiler is ageing and so I'd...
  3. D

    Vent for Shower Pipework in Loft

    A long time since I've been on here, but I need some more advice. Our 'spare' bedroom has a Mira power shower. The hot water is fed from the HW cylinder which is more or less on the same level but about 5 metres away, and the pipe runs up into the loft, and back down into the shower unit. The...
  4. W

    Painted soil and vent bits identification help needed

    Want to replace WC. Want to replace pan con and new WC waste may be slightly higher/lower. Never installed soil and vent so am guessing a bit here. Purple line fitting: regular pan conncector Red arrows: 110 elbow with top end being plain and bottom end having rubber seal. Inside elbow and...
  5. C

    vent overflowing after re-filling system

    Hi Guys, I,m sure this has been covered a multitude of times, but some additional advice would be most appreciated please. I have been using the CH system for many years with no problems, it's about 30 years old, the boiler was replaced about 6 years ago (baxi) and the pump replaced about 4...
  6. M

    Cold feed and vent

    I have always put the cold feed and vent near the pump as that's what I was taught. I now have a job I really need to move the cold feed and vent as they are piped up the old gravity way. The problem is getting them to the pump will be a right pig. Can I fit it to the cylinder return? Or do...
  7. A

    Open Vent system problems hot water

    Hi I have an open vented system with ideal boiler. When there is demand for hot water the central heating comes on (although there is no demand for heating). Am I right in saying that its the mid position valve that needs replacing and not the actuator head or will it be both? It was...
  8. A

    tank fed system boiler, vent and fed positioning?

    I have bin to take a look at a heating system thats heating the office part of a commercial building. Last year it had a boiler change, im not sure what was there before. What has been put in is an Intergas combi boiler, tank fed on the heating side, the hot water side is not connected. 1, Any...
  9. D

    How to vent my glowworm ultracom 30sxi

    Hello helpful people. I have a leaking safety valve, the system is losing pressure over a few days. I am about to replace it but after draining and fitting the new valve the instructions in the manual say "refill, vent and pressurise the boiler" My question is: how do I vent? I see there...
  10. B

    Combined Feed and vent pipe

    Hi, I was just doing a bit of repair work on my mother in laws system as the F&E tank was slightly overflowing, seems the ball valve was set far to high, so i adjusted it which naturally took the water level down to below the overflow, however, i noticed that there was no vent pipe over the F&E...
  11. M

    Air being sucked in through vent pipe

    Hi All Just recently with no changes to the system i am daily having to bleed upstairs rads. Its a vented system with CW Feed and expansion tank.pipe work & plumbing are original (approx 20yrs old )however new boiler,pump ,hot water valve ,stats and programmer 2 yrs ago all fitted by qualified...
  12. G

    Open vent CH. Heating works, but hot water very poor

    Hi All Moved in a flat with open vented CH system. 2 Water tanks in the loft. Cylinder in cupboard. Ideal Logic + Heat only boiler Installed 2014. Power flush done, pump changed. And heating system works very good. Problem is hot water. As soon as put hot water on, boiler keep switchs on...
    • gungaabayar
    • Thread
    • boiler central heating system cylinder hot hot water photos valve vent water works
    • Replies: 23
    • Forum: Plumbing Jobs | The Job-board
  13. G

    F&E tank open safety vent pipe

    Hello folks I was hoping for a few answers regarding my F&E tank. I recently changed my F&E tank to the 4 gallon polytank. I have inserted the open safety vent pipe into the top of this tank (can't seem to attach the pics, it keeps giving me an error.) Is this tank supposed to have a...
  14. C

    is it ok to raise F and E tank vent arm to prevent pumping over ?

    hi, i've had some modifications to my central heating system in past 6 months and am experiencing some set up problems : new boiler, new different spec. pump , trv's . i have been commissioning it myself basically because the installers aren't interested, i have noticed air collects...
  15. F

    Aquatherm mains installation (heating & vent or plumbing & heating?)

    When I was an apprentice I installed aquatherm for the mains and the risers, this was done with the evidence along with long write ups to accompany them only to be told that it was heating & vent and not plumbing & heating requiring me to sought evidence of a bathroom and radiators install...
  16. G

    cowl on vent

    hi all i have a betacom condensing boiler, which was installed a few years ago, i live in a very exposed area and have had problems with rainwater running down the large pipe during high winds, thus dripping on to the electrics tripping everything out, the end of the large pipe has a grill...
  17. R

    Can you bung a combined cold feed and vent?

    Never had an experience of having to do this but if it's a combined cold feed and vent can you still bung it the usual way?
  18. B

    Combined feed and vent

    Do you guys do these? How do you rate them??
  19. D

    Vent pipe discharging hot to F&E tank

    I have a conventional, old fashioned indirect system.Feed/exp and cold storage tanks in loft. Cylinder in bathroom below. Over thesummer, as usual, I've been set to "hot water only". The HW used tobe gravity (22mm pipes to/from boiler) but a few years ago a plumber fitted apump on the return...
  20. W

    Calculating Vent Pipe heights?

    Hi there, When calculating the height of the vent pipe for a CWSC, do you take the 'head' from the water level of the CWSC to the bottom of the hot water storage tank or to the lowest draw off point. I think it's the later but I'm doubting myself. Thanks in advance :-)
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