I'm sure this has been endlessly covered but I can't find a search feature.
What's a good filter system for making pure from tap?
Thank you.
What is the tds of your tap water?
Are you on a water meter and how many liters of water a day do you need?
Do you have a facility to store water?
First purchase is a tds meter from a reputable wfp supplier.
I'm in bedford so the TDS will be high as the water round here is harder than a hardy hard thing.
I will need to make it daily at first as there is no real storage yet.
I don't know how much I'm going to need yet.
So you need an r/o. An r/o when working efficiently will remove about 97% of the dissolved solids from your water. The remaining %ages would be polished off with resin. I would suggest a 5 or 6 liter di vessel for this. You will still need to buy a TDS meter.
The next question is to ask is how you are going to go about cleaning windows wfp.
If you need to process water quickly and directly into a tank in a van, then most systems revolve around 4040 r/o's.
If you have a storage facility and are able to store water in a garage for example, then you can use a cheaper, slower water producing r/o.
These smaller r/o's range from 50GPD to 450GPD. The smallest you could go for IMHO is a 300GPD but I would recommend a 450gpd. (The smaller ones are used by fish keepers.)
Now 450GPD sounds a lot of water but the day is 24hrs long, the gallons are US gallons (4 liters) and the membrane is rated and the best water temperature and water quality.
When it comes to a 450gpd in cold winter's tap water it would take over 36 hours to fill a 1000 liters IBC tank with about 800 liters of pure. It was only fractionally better in summer at 28 hours to fill the same tank.
A 450 will provide you will plenty of water once you get busy using an IBC tank as a 'reservoir'.
You would need a transfer pump to transfer water to you van or 25l plastic containers.
I would contact a reputable supplier such as Doug at Daqua.co.uk when the time comes. You will get quality membranes in the r/o as apposed to cheaper Chinese made membranes that aren't as efficient and wouldn't last as long.