Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: MNWC on October 19, 2015, 08:45:24 pm

Title: 40/40 ro flushing ?
Post by: MNWC on October 19, 2015, 08:45:24 pm: New 40/40 membrane fitted about 6 months ago bought from gaps. Its the low pressure one rated at 80 psi. TDS started at 25 when new but now creeping up to 35. Should i be flushing it ?
Title: Re: 40/40 ro flushing ?
Post by: SeanK on October 19, 2015, 08:50:13 pm: Yes you need to open up the valve or tap and run all the water to waste I usually do this for about 5 to 10mins
before making pure.
If you haven't done a flush for 6 months I would flush it for about half an hour.
Title: Re: 40/40 ro flushing ?
Post by: MNWC on October 19, 2015, 10:31:18 pm: Thanks Sean will give it a flush in the morning...
Title: Re: 40/40 ro flushing ?
Post by: martin hulstone on October 20, 2015, 08:27:47 am: If tds started at 25 i would invest in a water booster pump as tds on one of them new should be 6-8, sounds like you have poor water pressure. I had the hf5 and still needed a pump as tds soon crept up.
Title: Re: 40/40 ro flushing ?
Post by: 8weekly on October 20, 2015, 08:54:42 am: Quote from: martin hulstone on October 20, 2015, 08:27:47 am
If tds started at 25 i would invest in a water booster pump as tds on one of them new should be 6-8, sounds like you have poor water pressure. I had the hf5 and still needed a pump as tds soon crept up.
Yes, I get 12 from a Merlin with tap water TDS at 290.
Title: Re: 40/40 ro flushing ?
Post by: MNWC on October 20, 2015, 04:06:31 pm: That is with a booster pump ;D - https://www.machinemart.co.uk/shop/product/details/051012200 (https://www.machinemart.co.uk/shop/product/details/051012200)

Regards
Title: Re: 40/40 ro flushing ?
Post by: 8weekly on October 20, 2015, 04:11:17 pm: Quote from: MNWC on October 20, 2015, 04:06:31 pm
That is with a booster pump ;D - https://www.machinemart.co.uk/shop/product/details/051012200 (https://www.machinemart.co.uk/shop/product/details/051012200)

Regards
What's your input tds?
Title: Re: 40/40 ro flushing ?
Post by: Lee GLS on October 20, 2015, 04:54:22 pm: No need to flush, I haven't flushed mine for getting on for 2 years.
The membrane is 5 years old and brings 375 tads down to 18.
Title: Re: 40/40 ro flushing ?
Post by: Michael Peterson on October 20, 2015, 04:57:01 pm: also no need to flush, mine reads 5 from about 200 had it a year never flushed
Title: Re: 40/40 ro flushing ?
Post by: MNWC on October 20, 2015, 07:18:00 pm: [/quote]
What's your input tds?
[/quote]
Quote from: MNWC on October 20, 2015, 04:06:31 pm
That is with a booster pump ;D - https://www.machinemart.co.uk/shop/product/details/051012200 (https://www.machinemart.co.uk/shop/product/details/051012200)

Regards

360 in
Title: Re: 40/40 ro flushing ?
Post by: 8weekly on October 20, 2015, 07:47:00 pm: Quote from: MNWC on October 20, 2015, 07:18:00 pm

What's your input tds?
[/quote]
Quote from: MNWC on October 20, 2015, 04:06:31 pm
That is with a booster pump ;D - https://www.machinemart.co.uk/shop/product/details/051012200 (https://www.machinemart.co.uk/shop/product/details/051012200)

Regards

360 in
[/quote]I don't have a 4040 but my undertanding is you should get 5% or less, so under 9 output. Something's not right. The pump may be underpowered? I use one of these on my Merlin: http://www.tool-net.co.uk/p-366778/clarke-cbm240-1%E2%80%9D-multi-stage-water-pump-240v.html

But I'm just guessing.
Title: Re: 40/40 ro flushing ?
Post by: Walter Mitty on October 21, 2015, 12:43:19 pm: Sometimes the output TDS can drop after a pre-filter change.
I'm still getting 008 TDS from mine after a few years at 40psi or slightly less. The input TDS is less though around 200.
No pump.
Title: Re: 40/40 ro flushing ?
Post by: Smudger on October 21, 2015, 08:30:52 pm: Hi vin,

We have done exactly this in the last few months if you send me an email I will send you our findings tomorrow x Mrs smudger
Title: Re: 40/40 ro flushing ?
Post by: Rogue Trader on October 21, 2015, 11:27:28 pm: You don't need to flush. I did it for years but June at gapswater said not to bother as it makes no difference. I gave twin hf5. In 250 ish out 3-4. Don't even bother buying resin anymore!