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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Dirty hot water mystery
We have a pressurised HW system (an Albion Ultrasteel cylinder) with a
external 18L expansion vessel. For some time now we've suffered from intermittant dirty water supplies which we suspect was due to a problem with our water mains further down the street (as manifest by the major blowout recently http://i1052.photobucket.com/albums/...k/da49f87f.jpg ) Anyhow, our water supply (or at least our cold water supply) has cleared up but we continue to intermitently get dirt in our HW supply which I've been putting down to a HW cyclinder full of silt. If no water has been drawn for a while (like overnight) the HW is visibly stained. Today I thought I'd try and drain down the HW tank using the drain cock to see what the water was like nearer the bottom of the tank (expecting it to be really dirty). I filled half a bucket and poured it into our sink and this is what it looked like http://i1052.photobucket.com/albums/...EDFA1D3991.jpg As you can see, only very lightly stained. It seemed a bit pointless to carry on draining the tank so I repressurised and and refilled the sink from the tap with this result. http://i1052.photobucket.com/albums/...ED925ED3B6.jpg What I want to know is, where the feck is all this crud hiding?? This always happens if I depressurise and repressurise the tank. It's had a new pressure vessel about 3 weeks ago after the diaphragm failed in the old one so I know it's not the pressure vessel that's full of crud. As I say, our cold supply seems okay but I'd really like to flush all this crud out of our HW system but I'm mystified why water drained from the bottom of the tank is so much cleaner than what's coming out the top. Tim |
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