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head

A head is the part of an organism which usually includes the ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste, respectively. Some very simple animals may not have a head, but many bilaterally symmetric forms do, regardless of size.
Heads develop in animals by an evolutionary trend known as cephalization. In bilaterally symmetrical animals, nervous tissues concentrate at the anterior region, forming structures responsible for information processing. Through biological evolution, sense organs and feeding structures also concentrate into the anterior region; these collectively form the head.

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  1. jaydebruyne

    Showermate Negative Head Pump

    I installed a stuart turner showermate pump about a week ago. Was called back today as it has gotten quite noisy. Had a look today and it is rather loud, so much so the downstairs neighbours have complained. Any ideas? Air? Faulty unit? I flushed the pump before I connected it to the mains...
  2. G

    Overflow head scratcher !

    Hi, been to a customers house tonight . Overflow running from domestic tank , took a ball tap - thought I already knew the problem! Ball tap tap is working fine , submersed under water ran some hot water off , level in tank dropped . Bent arm arm down on ball tap , it shut off around 3"...
  3. D

    Toilet smell head scratcher!!!

    Afternoon all, I'm currently on a job where a "plumber" (basically DIY jobsworth friend of friend of the family!) has taken almost £15k from the customer for 2 of the worst bathroom refurbs I have seen! I explained to the customer the only way to make them look better is to rip them out and...
  4. M

    Fitting new TRV head

    Hi, the sensor head has broken off on one of the TRV's and can't be repaired. I have bought a like for like replacement TRV although it is only the head I need. I have tried fitting the head on by just screwing it on to the old valve with the securing ring but it doesn't seem to work and the...
  5. P

    Head?

    No, not that sort. :nono: Looking around on the internet, head seems to be measured either from the surface of the water in the cold tank down to draw off point, or from the bottom of the cold tank. Which one is correct?
  6. S

    3/8 shower rail and head, where to source

    As title guys n gals, just at the tail end of a huge heating upgrade and the custard has give me lots of extra's to do. In their ensuite they have a chrome rail coming out of the wall with a shower head coming out of it, the head is cream crackered and needs replacing......and Sod's law, it...
  7. I

    Noooooooooo do it yourself and pump head Mk2

    Awww god, hear we go again :lol:
  8. D

    head change

    Human Head Transplants Could Become A Reality By 2017 | IFLScience Should be fun
  9. T

    scratching my head....

    Got a call about a rad not warming up so I went Custard says they havnt had heating on for a while and when they turned it on the rad furthest away would not get hot so I turned all TRV off in the house and waited still no heat, bled every rad water comes out, even emptied the system to...
  10. S

    Colleague looking for help with a glow heap head scratchier.

    A good friend and fellow gas engineer of mine who is not currently a member of the forum (at least not with gas safe private forum access) has been to a British gas 330+ / Glow worm (not a hxi this one has an aluminium heat exchanger). The Boiler has an Ignition fault, when firing the burner...
  11. T

    Stumped - can you guys bend your head around this one - water going from the loo

    Can't fathom this one - what d'ya think? Water is pulled from toilet u bend, have replaced the durgo valve, tried it with no valve and tried it with vent pipe sealed - no difference, water is pulled out over apx 30 mins. I can see down the vent pipe and can see the water leaving when...
  12. M

    Radiator Valve Head Broken - Can it be replaced

    Hi, the head has broken off a radiator valve. The narrow plastic collar that inserts into the valve body has perished and eventually cracked. Can I just replace this head and can it be done easily? It is a Bulldog valve and I have seen the same one for sale complete on various web sites...
  13. C

    Blocking off the shower head from sink

    Hi, I've recently bought a house. The bathroom as a shower head on the sink. Would it be possible to cap this off? If so, what tools/pieces would I need? Also, would the water need to be turned off completely when taking off the shower head? Thanks
  14. D

    Ideal isar pump head gasket/seal

    Evening all, been to yet another leaking Ideal Isar 24, pump head gasket/seal. Tried resealing but to no avail. Is this available as a stand alone spare part or as part of a kit? Many thanks.
  15. T

    Hang my head in shame

    Dear father i have sinned................. I fitted a Worcester in my own house:speechless::shame:
  16. D

    Williams and Co moving head office

    Just want to say good luck to Ray Stafford and his team for tomorrow. The first day in your new branch and head office complex at Fareham. Sorry I can't pop in to see you, some of us have work to do in Gosport, but will see you and the new coffee machine soon!
  17. B

    Oil tank maximum head

    Im quoting for a new boiler but noticed the tank outlet is about 4 metres above the pump. I cant find in my books anything to prescribe when to use a pressure reducer. Anyone have any guidance? Doesnt appear to be in the MI. Thanks
  18. B

    Twin head pump or Y plan?

    Im quoting to replace a boiler (oil) and its currently got a twin head pump arrangement which seems to work ok. Shall I leave as is, or should I replace with Y plan (or even S plan I guess..).
  19. M

    Shower head with adjustable spray and bottom inlet

    OK I give up, I've spent ages looking for this but can't find one. A chrome shower head with a nozzle or head that can be angled in different directions but which also has a bottom inlet for surface mounted pipework. Any suggestions please post details. Thanks
    • ma701ss
    • Thread
    • 150mm adjustable bottom head inlet mounted shower shower head spray surface
    • Replies: 11
    • Forum: Plumbing Jobs | The Job-board
  20. G

    Scratching my head with an Intergas !!!

    Got the call from a mate who has never been near one, got there boiler losing pressure, checked for leaks and cant find any anywhere on the system. No water coming from PRV outside. Filled up to 1.5 bar and closed the F&R iso valves, stood there and watched it drop from 1.5 to 0 bar in approx...
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