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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. M

    neagtive head shower pumps

    Does anyone know which negative head shower pump can be fitted almost level with the base of the cold water storage tank? I am looking to try and fit one but I don't have much space. I think Stuart turner pumps normally ask for it to be about 500mm below the bottom of the tank?
  2. A

    Green gunk in shower head

    Hello, I am wondering if you can help! We have a square rainfall shower head and there is a green gunk forming where the connection from the arm to the actual shower head is, which is causing the shower to stop working. I understand this may be a build up of limescale etc. but I rigorously clean...
  3. U

    Green gunk in shower head

    Hello, I am wondering if you can help! We have a square rainfall shower head and there is a green gunk forming where the connection from the arm to the actual shower head is, which is causing the shower to stop working. I understand this may be a build up of limescale etc. but I rigorously clean...
  4. D

    fume leak from around the blast head

    Hi Guys, I serviced my boiler (Worcester Dansmoor 15/19 CF/FL with Riello RDB1 burner) last month and everything got a clean bill of health. At least that was what I thought. When the burner is going full blast I have no problem. But when it stops (or when I switch off the boiler) I start...
  5. S

    Low head pressure tmv suitable for unbalance supplies.

    Got a 'doc m' pack to fit soon in a working mens club, the hot is being supplied via a wall hung water heater, the type being fed by a little cistern above, the height of the water level is approx 2m above floor level and the tmv for the new wash basin will be approx 1.5m below water level. and...
  6. hammers4spanner

    My head is frazzled

    What a flaming day !!!! Turned up on a job starting 3 bathrooms and new trvs/lockshields on numerous rads lovely couple but talk about question time. Started off about her oil boiler wanting it updated /removed and asked about ashp/ground source /biomass and oil. They are very much into the...
  7. jaydebruyne

    Negative Head Pump on a Positive Head System

    Any reason this can't be done? Even if I take off the pressure vessel and cap it off??? The tank is probably less than 1 meter above the shower head so not much pressure to begin with anyway...
  8. J

    Just head butted a debt collector?

    Literally come home after having a few pints at the pub and I had a bailiff at the door demanding money from my wife regarding loans outstanding for ten plus years. She stupidly let him in just as I was walking through the door. He gives it billy big balls and I nut him over about a grand. I've...
  9. B

    Negative head kits

    Hi all just looking for any info you guys may have re negative head kits. Are they worth fitting? It would help me make a needed saving if only they .... 'do what it says on the tin'. Thanks for any info any may have
  10. A

    Can you recommend me a set of ratchet swivel head spanners and where to get.

    As title says. Hoping to pick up today so if anyone knows somewhere that sells a decent set for a reasonable price that would be great. Thanks
  11. 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...
  12. 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"...
  13. 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...
  14. 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...
  15. 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?
  16. 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...
  17. I

    Noooooooooo do it yourself and pump head Mk2

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

    head change

    Human Head Transplants Could Become A Reality By 2017 | IFLScience Should be fun
  19. 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...
  20. 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...
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