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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. S

    Salamander CT60BU negative head shower pump - intermittently coming on after use

    I have just had a Salamander CT60BU negative head shower pump reinstalled after the previous same pump failed. The old pump initially after installation, would intermittently come on after use. This would occur every 10mins or so and then after time there was a period of an hour. after a week or...
    • Steve-T
    • Thread
    • after america coming head negative pump salamander shower shower pump usa
    • Replies: 2
    • Forum: USA
  2. K

    what shower head is fast flow

    so long story short... old shower going hot and cold new shower installed new shower going and cold heat exchanger plate replaced shower still hot and cold kitchen hot tap (not a mixer staying hot) just removed the shower head on the new shower to test the water coming directly through...
  3. W

    Apron shower head for 1980s arm. Not G1/2 nor G3/4 threaded

    I need to find an apron shower head which fits an 1980s arm. The thread on the arm is either 7/8th inch or possibly 15/16th inch. It is unfortunately neither g1/2 not g3/4 thread. Can anybody give me a link to an apron shower head (my current one is 5 inch diameter) which will screw onto my...
  4. KingDoey

    Worcester Greenstar 25i head scratcher

    evening all. Called out to this boiler late last night. No HW. Pressure was down so checked expansion vessel etc and topped up. Hot water demand fires boiler which lights and then quickly reaches 97 odd degrees before shutting down. Get an initial blast of hot water through the pipes then just...
  5. CorgiDirect

    New Product Just In - Fluxuator Dual head for 15mm/22mm pipes

    This is a very popular product listed for sale on corgi direct today Best Price Online, Only £12.49 ex VAT Introducing the dual head. This version can be used to apply flux to both 15mm and 22mm copper pipe. 1 x 15mm/22mm bristle head 1 x removable brush and 1 x e75g tube of flux paste...
  6. hammers4spanner

    Scratching my head here with this.

    HAve hot water cylinder that have changed the immersion. However have changed it over still not working. Have 240v going through the element and all seems correct but still no hot water
  7. D

    Yet another 'how to remove this tap head?'

    Hi all, Bathroom basin hot water tap has slow drip. Want to replace the washer (if possible) but have no idea how to remove the knob head to get at the gubbins. It has no obvious grub screws 'round the back. Both knobs have always wobbled a bit and it only requires quarter-turn to go fully...
  8. M

    Do i have a positive or negative head?

    Hello All, I should already know the answer to this after doing some reading online, however for one reason or another im still not entirely convinced i fully understand. I just replaced my shower pump in the loft with a positive head pump, there is a ~1m drop between the water tank and the...
  9. KingDoey

    Banging my head against wall with developer

    hi all You may remember sometime ago I posted about radiator leaking a year later on new build... Well the same developer has now been on my case about flow rate. It is poor on the cold services throughout. He mistakenly got the builder to fit 20mm mdpe instead of 25mm when the place was...
  10. M

    Scratching my head (open vent)

    I need to tap in to the central heating due to an extension with underfloor heating that’s gone in. I want to be more than sure before tapping into the system due to its complexity and being an open vent I’m going to freeze the pipes I need to, so I can work on them. I was hoping to double check...
  11. T

    Snapped off shower head in wall

    Does anyone know how i solve this problem. I broke my shower head the other night while cleaning it. The metal has sheared off at the elbow joint in the wall which connects to the copper water feed from the valve. So i have the elbow joint still in place and secure, but it has the threaded bit...
  12. R

    Water pouring out cold tap, washers fine but bottom of tap head gear loose

    Hello, Last night my cold tap would not stop, it was pouring out and the tap was just going around and round. I switched off the water at the stopcock and opened the tap up to see if the washers were gone. The washers seem perfectly smooth and the tap is only about two years old, I tried to...
  13. J

    Pressure to shower head

    See pics. They want more pressure to the shower head but want the cheapest option. Any suggestions? Water pressure to the bathroom is good it's just the shower head that's a bit tame. My suggestion would be to fit a new bar shower and a pump. What else could be done?
  14. B

    Help with old motorised valve head replacement

    Hello all,is there anyone who could help,I have a very elderly back boiler system circa 1980 with a couple mo mo satchwell motorised valves one of which sounds like it's on it's last legs.Idealy I would prefer to just replace the head unit if poss as I don't really want to have to drain the...
  15. D

    Identify red head valve

    Hello. Can someone confirm what this valve with the red head is please?
  16. D

    Drayton trv2 Sensor Head

    I have a Drayton trv2 with a failed sensor head Now obsolete. Can I buy an adapter which would allow me to fit a trv4? Many thanks
  17. M

    Finding valve head replacement for filling loop?

    Hello, One of the black levers on my filling loop under the boiler has stopped working (when I turn it it's not opening the valve and no sound of water coming through). I think I just need to unscrew the black lever and fit a new one, but I can't seem to find one when I search online. I've...
  18. Scott_K

    Replacement TRV head

    Morning all. Would anyone be able to recommend a suitable trv head that will fit the old temset valves?
  19. D

    TRV missing head and odd size

    Can anyone advise on the brand of TRV head that I would need for this value. Moved into a house with two radiators missing TRV heads, and they seem to be a different size/shape to all other TRVs that I have. From the images can anyone recommend suggested TRV head that may fit. Thanks David
  20. G

    Edwardian tap head - internal spline worn. Advice please

    I have an original Edwardian bath with a tap mixer in the wall. Until recently this all functioned perfectly. Recently though the cold tap has started to slip on the valve spline. By swapping the cold and hot tap heads I know it is the cold tap internal spline that is worn. I don't want to...
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