spruce-your a god!!!!!!!!!!!!!!! cyber pints and a kebab to you-i kinda understand a bit more now?i know i need a few more bits now to make it complete-got the tds meter so wet with testing this its not happy and the screen has gone blank but compared to a new membrane its small-right do i need some pressure meters like the diagram?i can understand what they do but if i changed pre-filters every three/four months would i still need them?maybe thought of an inline tds moniter to control things a bit?any suggestions?kev
The idea of 2 pressure gauges is that you can see what is happening with your prefilters. when compared to inlet pressure. The water board has raised the water pressure in our area this summer from 40 to 50psi which will be evident on the first gauge. As the sediment filter get clogged up the pressure on the second gauge will drop.
Do you need pressure gauges? Probably one after the prefilters as with use you get to know what's happening. I purposely ordered clear housings so I can see the state of the sediment filter at a glance. We have a lot of sediment on our water and the sediment filter is good for about 6 weeks tops. Once I had to replace it in a couple of days - now I keep my eyes open for water mains work and switch the r/o off until I've had the chance to run the bath will cold water and see how much dirt is in the water.
I have an inline tds meter with 2 probes. The first is inline after the r/o and before the di vessel and the second is after the di. This will help you get the sweet spot between waste and pure. At the moment that inline tds meter is a great investment.
We have this inline meter from:
www.daqua.co.ukHM Digital DM-2: Commercial In-Line Dual TDS Meter
You will also need to replace your hand held tds meter and whilst you are at it, I recommend you get a bottle of tds testing fluid.