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Brown is a composite color. In the CMYK color model used in printing or painting, brown is made by combining red, blue, and yellow. In the RGB color model used to project colors onto television screens and computer monitors, brown is made by combining red and green, in specific proportions. In painting, brown is generally made by adding black to orange or yellow.
The color brown is seen widely in nature, wood, soil, human hair color, eye color and skin pigmentation. Brown is the color of dark wood or rich soil. According to public opinion surveys in Europe and the United States, brown is the least favorite color of the public; it is often associated with plainness, the rustic, feces, and poverty. More positive associations include baking, warmth, wildlife, and the autumn.

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  1. R

    Strange brown substance coming up into toilet bowl

    Hi all, I'm hoping someone on here will be able to help me with an issue I'm having at home. We've just returned from a week long holiday and have noticed that one of our toilets (a catalano toilet on a geberit frame) seems to have brown water coming up into the toilet bowl. When we flush, the...
  2. I

    Green / Brown sticky substance on combi boiler pipe

    Hi, Does anyone know if this is a problem? Per attached pictures one of the pipes coming out from the boiler (Worcester) has a green/brown sticky residue. Sometimes it will harden, other times like the picture it will soften and slowly run down. Its not water like, more like grease. I have BG...
    • InverclydeBoy
    • Thread
    • america boiler brown combi combi boiler green pipe sticky usa
    • Replies: 2
    • Forum: USA
  3. Michael Groves

    Mains Pressure Hot water System - Brown Sludge

    I got a Mains Pressure Hot water System, it's about 3 years old. The shower filters get blocked yearly, and if it gets drained for maintenance, when you purge the system, you get loads of brown sludge. This is on the hot water side only. How can I prevent this brown sludge build-up, and how can...
    • Michael Groves
    • Thread
    • america brown hot hot water hot water system mains pressure sludge system usa water
    • Replies: 21
    • Forum: USA
  4. D

    Brown gel in CH header

    Hi. I recently(3 yrs) had my boiler replaced and the system was really thoroughly cleaned with a professional pressure flush. Fernox inhibitor was used on the refill. Ever since, my header tank has suffered a build up (over 6 months or so) of a thick brown gel which floats on the surface and a...
  5. S

    Oso unvented water heater, leaking and brown marks?

    So for whatever reason i went into my cupboard today where this Oso unvented water heater sits, so while in there i hear a faint dripping noise, i look and notice i see some drops of water dripping from one part of the heater.. i also notice some scorch/brown marks on different areas mainly near...
  6. P

    Red and brown plugs ..radiator fixing

    This is interesting, when fixing a rad I tend to not use the supplied fixings and just use my own. I use Rawlplug Uno brand as I think you get a really good grip. Any Rawlplug nerds will find this video interesting.
  7. M

    Brown water for 2-3 seconds

    Please forgive my lack of knowledge but I thought i'd ask if anyone would have any idea on how to locate the following problem. I have had dynorod out who 'drained down?' tanks but to no avail: Problem: in an upstairs bathroom when I run the hot and cold sink taps i get brown water for 2-3...
  8. P

    Can I mix orange / brown internally with black grey.

    Orange is cheaper but aware that I can't use outside above ground due to UV but if not seen in a cupboard inside house.... Can I ? Thanks
  9. I

    Slight drip brown water from nut / bleed valve area?

    Hi, we have 2 rads. where there is slight rusting visible around the silver nut around the bleed nipple. water is coming out but evaporates to leave a brown stain. Can I tighten nut...or will this need replacing? Do I need our usual plumber..or diy? thanks.
  10. K

    Help please.....water tank issues and brown hot water!!?

    Hello I’m a 30 year old single lady, I’m going to be totally honest and say I know nothing about plumbing!!! Ive lived here for 6 years (am homeowner) no plumbing problems. I have two water tanks in my loft, 1 hot water tank and 1 normal water tank. Both of them are intermittently leaking out...
  11. robj20

    Brown central heating water

    What is the cause of brown central heating water? Its a completely new system, plastic pipe throughout, expect first meter from boiler and the risers to the radiators. X300 was flushed through first then filled with F1. It has a filter on the return. Been using it for about 2 weeks now and...
  12. B

    Joint leak - what is this brown stuff ?

    Hi, what is this brown stuff f from this joint ? Just water leaking via joint tape ?
  13. M

    2 port valve or programmer?

    Hi. I'm needing a bit of reassurance. I've had a long weekend, whilst enjoying my Sunday on the couch someone from around the corner called me to say their hot water wasn't working. It's an S plan with 2x two port valves. Heating works as it should on the timer and room stat. Hot...
  14. B

    Strange brown water marks on my white plastic cover vaillant ecotec plus 838

    HI everyone Had my new boiler about 4 months... it's a vaillant ecotec plus 838... Today I noticed some browning on the white plastic cover looks like could be water marks... or some sort of lacker issue... Anyone seen something like this before?
    • Buysite450
    • Thread
    • brown cover ecotec ecotec plus marks plastic plus strange vaillant water white
    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  15. H

    Brown Switchmaster woe!

    We've recently been having issues with our central heating coming on. No matter whether we have our setting on for "twice", "all day " or "24hrs" we have no hot water in our radiators. Our boiler is definitely working, it heats our hot water. I've looked in our airing cupboard and notices the...
  16. R

    solvent weld on brown underground pipe.

    Got a 110 mm brown UG pipe stub coming up through sub floor concrete. Want to connect a shower waste via a strap boss just above the concrete so that the pipe can run in the insulation and under the top screed. Will be very inconvenient if joint leaks! But I have doubts as to whether you can...
  17. B

    sterling brown

    any one had an email from these usual stuff offers of work (possabily) doesn't mention how much they want /or don't just wants you to register interest but I don't want to be pestered if there like all the rest
  18. J

    Digital Thermostat

    I am thinking of changing from old thermostat to digital. There are 3 wires in old one but only need 2 in digital. The grey wire is not needed what is grey wire for
  19. Best

    RIP pilot Eric Brown

    Sad to hear this great man has died, albeit at the good age of 97. Eric 'Winkle' Brown dead: British pilot who flew more types of planes than anyone else in history dies - Mirror Online
  20. MZR

    Danfoss HSA 3 valve

    hi all been called to a gloworm ultimate 60ff today with a danfoss hsa3 motorised valve, the hot water works fine the heating when called for the stat says its on but the valve is not moving if i put it on manual then it all works fine but the stat wont switch it off until the valve is moved...
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