Can low water pressure have a big effect on your ppm reading?

[joe34]

Hi, as the title says the water pressure has gone really low where I am, they have just built another 20 houses down the end of the road so i'm not sure if that's anything to do with it? but still getting a high reading after ro would the pressure effect it that much?

 

[doug atkinson]

Yes if you have 2 bar then you will only get around 94% rejection rate . For example input 100 ppm then output 006 ppm.

 

[joe34]

Thanks doug .

 

[Tuffers]

Get canvassing those 20 houses :thumbsup:

 

[joe34]

Haha I have one of them

 

[doug atkinson]

Hi Joe, sorry missed your call. Did you get the part number

 

[joe34]

H doug, the model was a xle 4940 Dow?

 

[doug atkinson]

That's a 125 psi rated membrane that is more suitable for commercial ro systems not wfp systems so you will need a booster pump.

 

[joe34]

Thanks for looking that up Doug,I wish I'd spoken to you first before buying,what's the lowest psi 40 40 ro you sell?and is it the same sort of price as the dow?

 

[doug atkinson]

http://www.daqua.co.uk/reverseosmosis.htm HF5-4040 rated 80 psi - £250.00

I have a new booster pump in stock today made in USA but want to trail it first before putting it in the market.