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UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: [GQC] Tim on June 17, 2008, 11:08:51 pm

Title: Purefreedom 300GPD RO underperforming?
Post by: [GQC] Tim on June 17, 2008, 11:08:51 pm

Hi, I'm having doubts about my RO.

235 In, 20 Out, 100PSI after pre filters.

Shouldn't the TDS out be a lot lower?

Haven't measured production/waste rate in a while, can't remember what it is.

Title: Re: Purefreedom 300GPD RO underperforming?
Post by: easycleaner on June 18, 2008, 06:27:47 am

Its not performing bad at all, do you carry out flushing out regular? how old is it or have you changed the pre filters?
Mart

Title: Re: Purefreedom 300GPD RO underperforming?
Post by: Dean Taberner on June 18, 2008, 06:37:52 am

Have you got a DI filter? Mines about 240 going in 20 going out and then after the DI its 0.00

Title: Re: Purefreedom 300GPD RO underperforming?
Post by: Simon_King on June 18, 2008, 07:58:58 am

Having trouble setting up a link to my post :2 month old RO - ppm 30 plus

Have a look.

Title: Re: Purefreedom 300GPD RO underperforming?
Post by: [GQC] Tim on June 18, 2008, 09:43:16 am

Yea I'm flushing it regularly, have only done about 4000l, so prefilters shouldn't need to be changed yet I think.

Title: Re: Purefreedom 300GPD RO underperforming?
Post by: mark dew on June 18, 2008, 10:58:58 am

Is it 20 as soon as you turn the valve to production?
My 300gpd from ro-man has water going in at 480ish and comes out around 25. But i disconnect the hose to the DI vessel and let it run for 5 minutes. After this it has come down to 7ppm.

Title: Re: Purefreedom 300GPD RO underperforming?
Post by: [GQC] Tim on June 18, 2008, 11:01:09 am

Hmm, there's a thought, I measure it straight from the tank. (From the tank it goes to the DI) The water in the tank is at 20.

Title: Re: Purefreedom 300GPD RO underperforming?
Post by: Dean Taberner on June 18, 2008, 05:21:38 pm

Itl be 0.00 from the DI then mate. Panic over 8)

Title: Re: Purefreedom 300GPD RO underperforming?
Post by: [GQC] Tim on June 19, 2008, 02:05:34 am

Quote from: deantaberner on June 18, 2008, 05:21:38 pm

Itl be 0.00 from the DI then mate. Panic over 8)

True, but the lower the better, resin will last longer then won't it.

Was just wondering if those figures are okay, it did spend a couple of very frosty nights in the workshop unprotected. Not sure if it got under zero in there, but might have messed things up, wasn't filled with water though.

Title: Re: Purefreedom 300GPD RO underperforming?
Post by: Simon_King on June 19, 2008, 05:50:55 pm

How old is your RO? Mine is 2-3 months old and I had a similar problem.
Ive got a 200GPD and my TDS out the RO is now 11ppm. My tap water is 288-310ppm
Prior to replacing my membranes it was 30ppm post RO.
The membranes on it where cheap ones with 'technology derived in USA' written on them.
Mine is a Purefreedom RO.
As you can see 20ppm isnt special when your water is 235 to start.
I'm not over pleased with mine still because with my old system (100GPD!) my tds out was 6ppm!

Title: Re: Purefreedom 300GPD RO underperforming?
Post by: [GQC] Tim on June 19, 2008, 10:04:57 pm

I'll have a look tomorrow what it says on there, but it's older then that.