Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: julianbiggs on February 10, 2014, 09:17:44 am

Title: Should our 4040 RO be knackered by now ?
Post by: julianbiggs on February 10, 2014, 09:17:44 am
We've had our 4040 ro since August 2012.

We're a 2 man set up using 500-600 litres per day.

So we've been using it for 18 months totalling  around 306 days ( full days )

My water measures 185 from the tap so not too hard really

I checked the tds yesterday and its reading 29. rechecked it several times and still around the 29 mark.

After 18 months should we need to replace the membrane ?

Title: Re: Should our 4040 RO be knackered by now ?
Post by: gto on February 10, 2014, 09:21:54 am
29 is high for RO output.
the lower the better, it should be under 10 really. before DI
Title: Re: Should our 4040 RO be knackered by now ?
Post by: Smudger on February 10, 2014, 04:50:55 pm
How often have you changed the prefilters ?

Have you left it to stand over Christmas for a couple of weeks where it may have dried out ?

Darran
Title: Re: Should our 4040 RO be knackered by now ?
Post by: Spruce on February 10, 2014, 08:09:42 pm
Quote from: Smudger on February 10, 2014, 04:50:55 pm
How often have you changed the prefilters ?

Have you left it to stand over Christmas for a couple of weeks where it may have dried out ?

Darran

Ours has been in for 18 months and still producing pure at 2 ppm with 115 ppm input. As per Darran, regular prefilters are very important to long membrane life especailly with the cost of them.
Title: Re: Should our 4040 RO be knackered by now ?
Post by: Steve foster on February 10, 2014, 10:25:05 pm
Mine lasted 12 years. Changed it when it reached about 015 TDS.
Title: Re: Should our 4040 RO be knackered by now ?
Post by: a900 on February 10, 2014, 11:27:51 pm
12 years. No way.

What were you doing to keep it going that long??
Title: Re: Should our 4040 RO be knackered by now ?
Post by: Steve foster on February 11, 2014, 02:39:04 pm
Straight up, Harrogate tap water is very soft. Regular 3 monthly filter changes. Never use resin. Buetifull  ;D
Title: Re: Should our 4040 RO be knackered by now ?
Post by: SeanK on February 11, 2014, 03:06:24 pm
Mines going on 6 years and is still getting the tds down from 210 to 12ppm.