[starion]

   had my merlin about 4 months now, tds quite high(about 50) what filters need to be replaced? 

  also, how much and best place to buy? thanks.



                  regards, callum.

[Easyclean Windows]

4 months........depending on your tdi input hard or soft water you should only be changing your pre filter about every 3 months.Your membranes should last between 2-3 years without changing

[starion]

   tds going into merlin about 300, which one is the pre-filter?

  is it the one connected to blue pipe which carries water out of merlin, not good with technology.

  it's about 8 inches and cylindrical(the filter that is) and white in colour.


             regards, callum.

[Easyclean Windows]

the top one is the one that needs changing

[starion]

  thanks easyclean, will send off for one tomorrow.

[Easyclean Windows]

http://www.gapswater.co.uk/acatalog/reverse_osmosis_pre-filter_sets.html

[cybersye]

starion
do you use a pre sediment filter also? if not look into getting one, a lot of people on here advise it, theyre cheap and lengthen the life of the pre filter and membranes or so i'm told. i use one anyhow, 6 months on and no problems yet
simon

[Easyclean Windows]

i used to usw a pre sediment but was told that is only any good if you are using your merlin to produce drinking water

[cybersye]

i used to usw a pre sediment but was told that is only any good if you are using your merlin to produce drinking water

oh, well maybe i stand corrected! anyone else have any advice on that? is it worth doing?

[JM123]

high tds doesn't mean high sediment - no matter what though you should use a sediment filter before your merlin, the cost of changing a sed filter is very little, another consideration with the merlin prefilter (top sump) is that it is primarily a carbon filter, a very small amount of sediment will clog it up, also it should be changed every 19,000ltrs of inlet water or every 3 months - whichever is sooner. Lastly, don't forget that for the merlin to operate efficiently it needs to be backflushed regularly.

[carlfoster]

How do you backflush? And which prefilter would you recommend for it?

[JM123]

get your prefilter from www.gapswater.co.uk - you can backflush it by flushing pure water through the flush port using the merlin flush kit also available at gapswater.

[Easyclean Windows]

http://www.gapswater.co.uk/cgi-bin/sh000001.pl?REFPAGE=http%3a%2f%2fwww%2egapswater%2eco%2euk%2fcgi%2dbin%2fsh000001%2epl%3fREFPAGE%3dhttp%253a%252f%252fwww%252egapswater%252eco%252euk%252facatalog%252fsearch%252ehtml%26WD%3dback%26PN%3dReverse_osmosis_kits%252ehtml%2523a528&WD=flush&PN=GE_Merlin_reverse_osmosis_system%2ehtml%23a4#a4

[carlfoster]

Thanks, I think I'll get the flush kit. I see the carbon pre filter that my merlin already has. I don't see an additional sediment filter though except ones for other RO systems. Any idea on which sediment filter to get?

[JM123]

probably best to get it from ro-man click this link, you can go for either the 10 or 20 inch - we use the 20 inch, here's the links you need.

http://www.ro-man.com/shop/index.php/cPath/25_47  for the housing

http://www.ro-man.com/shop/index.php/cPath/24_42  for 10 inch filters

http://www.ro-man.com/shop/index.php/cPath/24_41  for 20 inch filters

http://www.ro-man.com/shop/product_info.php/products_id/201  you need 2 of these for a housing

[carlfoster]

Brilliant, thanks