The last 6 years wfp i have used a 300gpd and 2xmerlin units.
I havnt a clue what im looking for with a 4040 setup.
My water is 300-360ppm from tap and water pressure is at 40 psi.
Is it as simple as buying a 4040 housing and membrain??. And having 1x carbon and 1 x sediment filter running before membrain??.
Whats dofference between hf4 and hf5??.
I have seen the ez ro and am liking it but cant find any reviews...
Thanks in advance for any help.
For me, yes it was as simple as that on paper. In practise it was totally different.
I bought the components I wanted and assembled it myself.
Now I would buy a ready kit that you assemble - the kit will contain all the bits and pieces you will need. Daqua had a good price on them when I last looked.
I opted for the 20" prefilters. I reasoned that a 20" carbon block had more surface area available to remove chlorine than a 10" filter. My water pressure is 40 psi and our tap tds is 100 - 125. I choose an HF5 membrane for the lower water pressure although PureFreedom did advise that at 40psi both HF4 and HF5 will perform the same.
TDS after r/o but before di is between 1 and 2 depending on the tap tds on the day. I have a 6.5 litre di vessel. The resin was put in last September and still going strong. My r/o performs best at about 55% waste to 45% pure which gives me 2 litres a minute of pure. It would be recommended that with your higher tap tds, you will be better off with a higher pure to waste ratio, but higher water costs need to be seen against reduced membrane life.
I would go the 4040 route rather than the 4021 route. If you needed to upgrade, then you will find that replacing 2 x 21" membranes are much more expensive than a single 4040.
I do not have a booster pump.
Added:
We are at the end of the water line in our Cul de Sac. The pressure isn't as high as it is in other places in our town. We also don't have the best of water volume either. I run 2 prefilters, 1 sediment and 1 carbon block. We have a high amount of sediment in our water, so I chose to fit 2 pressure gauges, 1 on the inlet and the other after the carbon block. Even with new filters fitted, there is a pressure difference between the inlet and outlet gauges. However, as I ordered clear filter housings, I can see at a glance when filter is getting dirty and needs to be changed.
I joined the prefilters together and they are secured to a double bracket. The inlet and outlet hoses on the prefilters are quick release, which enables me to take them out of the r/o cabinet as a unit and change the filters on a table in the back garden.
