Views on large rain water harvesting systems

[ey143]

I did yes, but did you see the Thames water link above and the tariff?
http://www.thameswater.co.uk/tw/com...-charges/12495E-metered-charges-2014-2015.pdf

I was simply reading of their table the cost of a flush : water in and water out, so not sure the relevance of factor, unless they got their table wrong?

 

[RNReindeer]

Vaguely brings back some dark memories of one of my MBA classes I wasn't paying attention to.

Are you a hedge fund manager?! You don't sound like a builder. Lol.

I'm just a well-worn DIYer. Well worn from when holes in masony for rawlplugs were made with a rawlplug tool, (when the tips broke, they were potential missiles) and holes in timber were made with a swing brace, an auger or a hand drill.

My Systems Behaviour/Change Management training comes from an OU degree, (over 30 years ago now) which greatly assisted my carreer, from which I retired over 10 years ago.
One of the benefits of an OU degree is when you fall asleep, the teaching pauses and waits for you to wake up!

 

[Norcon]

Can I please have some views from builders and home users on their experience or use of a large (1500+ litres) rain water harvesting system?

I have a fairly large house (project) with 5 or so bathrooms and am on a water meter. Rough cost of water in and out as waste is approx 1.4p per litre I am told. As I also have a very large garden and roof, Was thinking of using the water to feed the toilet cisterns in the house. Cost of materials maybe £2500 plus labour but I'm gutting the whole house anyway.

Aside from pump maintenance issues and colour of water, are there any other issues worth considering? Alternative is a bore hole at maybe £7k cost.

Thx.

A high quality Harlequin 2100 Litre Single Skin Tank costs £550 quid.
A Clarke BPT1200SS 1” Stainless Steel Booster Pump which includes filter costs £215 quid.

Job Done.

If you wanted a higher spec pump then use something like a Dab Jet-Euro with active drive invertor for £430 quid.

 

[maltaron]

You will need more than 1500 litres just for flushing toilets in a 5 bedroom house. I use 1000litres in 2 weeks for 2 people in a one bathroom bungalow. I use IBC tanks (2 for £130 delivered off E=bay). All in I have over 4000 litres of storage and this does all toilets and garden use. I have a tank in the loft with a float switch that controls a pump to keep the tank full, this supplies the toilets from one IBC tank normally filled by rain, but I have a small river in my garden for dry periods. In may not be cost effective in London but in Cornwall we my around £5.00 per cubic metre (1000litres) with standing charge. Pump wise I use second hand Turner shower pumps off e=bay.

 

[big-all]

in that link above £87.30 is the standing charge which is most off the cost off your water so they must be averaging the standing charges over the average use
in other words you use 1 unit it costs you £89.30 per unit [87.30 +2]
you use 10 units it costs you £107.30 [87.30+ 20]
if you use 50 units the water now is the greater part but only just at£187 [87+100]
but the water is still only around 0.2p a L

 

[big-all]

in that link above £87.30 is the standing charge which is most off the cost off your water so they must be averaging the standing charges over the average use
in other words you use 1 unit it costs you £89.30 per unit [87.30 +2]
you use 10 units it costs you £107.30 [87.30+ 20]
if you use 50 units the water now is the greater part but only just at£187 [87+100]
but the water is still only around 0.2p a L

ok you water is slightly more at £2.073p but still as near vas damd it 0.2p aL
or less than 10p a flush