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- Super Spammer
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Posted: 21:33 - 09 Jan 2018 Post subject: |
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stephen_o wrote: | "Water from the taps in a domestic setting is either drinking water (direct from the mains at high pressure) or it isn't (which is usually when it's been stored somewhere like the OP's tank, and is at low pressure). Depending on the plumbing setup, drinking water may be available from all cold taps in the house, or just the one at the kitchen sink."
Absolutely correct. That could almost have come from a text book! I did 4 and a half years at college 2 1/2 days a week in addition to a full time job and then worked self employed for 4 years doing a variety of jobs from 1st/2nd fix site work to emergancy call out floods, central heating failures (divertor valves etc) and bathroom replacements. A personal non favourite was macerators.
The OP is right in the definition from the dictonary of Potable water. The issue is that most people assume drinking water in a house to relate to only that from the kitchen cold tap. Building regulations mean that water to drinking standards should be available from more than one outlet in a domestic house and all commecial outlets (unless labelled by the tap - do not drink). this is encompassed in the water regulations supply and fittings regulations which I was trained on the 1999 act but it has been updated recently.
This resulted in the regulations one of which is known as byelaw 30 which meant that an existing installation which was being worked on - as per the OP - the occupier should be advised of the new regulations and the apparatus upgraded. This was because people were unknowingly brushing teeth, washing clothes and dishes in water that was stagnant, filthy and in warmer weather there was an extremely small chance of a user gaining a waterborne illness.
In the regulations the term potable water was defined as "all water supplied by an undertaker (the word for a water company) into a property for use in the property" therefore putting all uses of water except central heating into the potable category. This is why the installation upgrade kits were produced and stocked - the byelaw 30 kits I linked to earlier.
It is in the Op's interests to at least correct the poor workmanship, there is a risk that the braided hose can fail internally - I have known these go very quickly especially when twisted because of the back pressure.
As a final point - It is possible and legal to wash your clothes and dishes and shower etc with "grey" water which is usually harvested from a rainwater downspout but any tap outlets must be marked "not drinking water" personally I would love such a system but the complexity means it really is only appropriate when specified in a new build.
I wish the OP luck. I know it isn't nice to be told that something you have paid money for hasn't been done right.
Stephen |
So like I said then. It means drinkable, not grey water too. ____________________ TZR250 2MA road, TZR250 1KT road, TZR250 2MA race, TDR250, YZF-750R Boost colours.
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Posted: 10:49 - 10 Jan 2018 Post subject: |
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stephen_o wrote: | That has all changed now again, it was decided that building houses like yours with all the cold draw straight from the mains supply but too much pressure drop on the street main so now it is back to one mains cold tap in the kitchen and everything else fed from a tank but the tank having to comply with the new regs so the water is safe to drink. |
Hey, I know you're the expert, but that's nonsense isn't it?
Drinking water, aka "potable" water specifically must be kept under pressure to keep the chlorine present. Once allowed to sit at normal atmospheric pressure in a tank the chlorine dissipates and it no longer becomes drinking water.
As far as I read, no drinking water comes via the tank in the house. ____________________ TZR250 2MA road, TZR250 1KT road, TZR250 2MA race, TDR250, YZF-750R Boost colours.
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weasley |
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weasley World Chat Champion
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Posted: 17:15 - 10 Jan 2018 Post subject: |
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weasley wrote: | As far as I can make out there is:
- water you should drink (ie mains water)
- water you can drink (ie from the loft tank)
- water you should not drink (grey, foul and surface water).
Tank-fed water is not recommended, but is ostensibly OK for incidental consumption.
Our previous house had a loft tank, with lid - it fed the bathroom and we all cleaned our teeth in it and swallowed small amounts. Still here.
Our current house is all fed from the mains, with a soft water circuit and a fresh water circuit. No tanks at all above ground level. I like it better.
Back to OP, stephen_o has given some great advice and insights - I'd be looking at doing that stuff. Remember also that if your loft is insulated then NOT to insulate between the ceiling and the water tank - the heat lost through this small area helps keep the tank from freezing. |
Weasley is correct. I did not write the regulations, but I a Severn Trent Approved Contractor trained in the legislation and practices. You may disagree with me, you may disagree with the legislation but it is there. The legislation was written to effect a "control" over stored water that COULD be taken into the body and to reduce waste. For example, how many of you run your cold tap (fed from the tank) e.g bathroom sink and notice the water is warm and takes a while to go cold? the reason is your cold water pipes were fitted in a run with the hot water pipes and usually the central heating pipes so the heat from one affects the other, this used to result I am told in water being wasted being run off. Water Companies now they are all privatised don't want to invest in upgrading mains and new reservoirs etc so usage and wastage management was applied instead. This is where the regulations came from.
All water piped into a domestic property from a water company (undertaker) has to be treated with chlorine and most is also treated with fluoride. Personally I would prefer not to drink water with chlorine and fluoride in it but that's the situation. The fluoride is added purely to assist with dental hygiene, the chlorine is in to kill bugs and bacteria in the pipes etc so that you don't become ill from drinking it. When this water goes into your tank the chlorine will slowly evaporate as will some of the minerals in the water - see your white deposits above the water line in your tanks. If left in an un lidded and uninsulated tank with uninsulated pipes to taps this water will eventually become unfit to drink but with a lid, insulation, and a reasonable throughput of water (i.e not sitting for days) the water will still be fit for use including drinking although due to the chlorine evaporation and it sitting it will taste different to fresh out of the kitchen tap in exactly the same way as if you pour a glass of water from the tap then leave it overnight to the following day - it doesn't taste the same but it doesn't make you ill.
Personally I don't drink the water from my bathroom tap but if I had a situation that mean't I couldn't get to the kitchen (back injury) then I would.
I can't help the regulations and I have to abide by them, a non registered plumber can do what he wants - the results are in the pictures posted. ____________________ current scoot 2009 Yamaha YBR250 + Current Pootle 2013 Nissan Leaf |
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Old Thread Alert!
The last post was made 6 years, 106 days ago. Instead of replying here, would creating a new thread be more useful? |
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