Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: herbiefatboy on March 22, 2008, 09:59:04 am

Title: membrane help
Post by: herbiefatboy on March 22, 2008, 09:59:04 am

this question has i am sure been asked before but how long do the membrane in 100gpd   300gpd  with a high tds last a rough guide would be great thanks

Title: Re: membrane help
Post by: Ian Lancaster on March 22, 2008, 10:02:20 am

Depends how you look after them.  With a decent booster pump and regular flushing/prefilter changes, my 300gpd RO-man lasted 3 years, then I sold it and it's still going strong on the original membranes.

Title: Re: membrane help
Post by: herbiefatboy on March 22, 2008, 01:23:32 pm

thanks for your help

Title: Re: membrane help
Post by: herbiefatboy on March 22, 2008, 01:26:13 pm

also what are the signs to tell your they need changing.

Title: Re: membrane help
Post by: mark dew on March 22, 2008, 04:05:45 pm

my 300gpd ro membranes have lasted 2 years now. Changed the prefilters after 18 months cos the tds started rising. New filters and good as before.
I assume you will know when membranes need replacing when tds rises and new filters don't make a difference.

Title: Re: membrane help
Post by: windowwashers on March 22, 2008, 06:51:32 pm

Quote from: mark dew on March 22, 2008, 04:05:45 pm

my 300gpd ro membranes have lasted 2 years now. Changed the prefilters after 18 months cos the tds started rising. New filters and good as before.
I assume you will know when membranes need replacing when tds rises and new filters don't make a difference.

18 months on pre filters  :o

I change mine monthly

Title: Re: membrane help
Post by: frames to panes on March 22, 2008, 06:54:31 pm

 :o monthly why ???

Title: Re: membrane help
Post by: windowwashers on March 22, 2008, 06:55:40 pm

Quote from: DJW on March 22, 2008, 06:54:31 pm

:o monthly why ???

because I can  :P

Only joking
I have loads of filters, a box full, my water is very bad out of tap, it is not bang on a month but not far wrong, I do this as I use alot of water and I want to protect the membrane in my 4040

Title: Re: membrane help
Post by: frames to panes on March 22, 2008, 06:58:46 pm

Blimey, how often do you change your engine oil?

Title: Re: membrane help
Post by: brightnclean on March 22, 2008, 07:18:30 pm

OMG @ 18 months beteween filter changes!!!  :o

If ur membranes aren't knackered ur very.. very lucky.

The carbon ones are there to take chlorine outta the water coz it damages RO membranes. The signs that membranes have had it is lower and lower  output and higher and higher TDS out. How do I know?  Coz I ruined a 40 inch membrane by not changing the pre filters :(

Ian aint overdoing it..  didn't u buy a great stack of cheapo ones Ian? I am not saying they are crap but u paid next to nowt for em as I remember in a thread a while back?

Title: Re: membrane help
Post by: windowwashers on March 22, 2008, 09:14:28 pm

Quote from: brightnclean on March 22, 2008, 07:18:30 pm

OMG @ 18 months beteween filter changes!!!  :o

If ur membranes aren't knackered ur very.. very lucky.

The carbon ones are there to take chlorine outta the water coz it damages RO membranes. The signs that membranes have had it is lower and lower  output and higher and higher TDS out. How do I know?  Coz I ruined a 40 inch membrane by not changing the pre filters :(

Ian aint overdoing it..  didn't u buy a great stack of cheapo ones Ian? I am not saying they are crap but u paid next to nowt for em as I remember in a thread a while back?

you are right I did a box full, and they are just as good as the others to be honest