Do not use puregen. I use it before and left it in my old house when i shifted to my new house. It have a funny smell every morning when i use the water. I back wash it every week but still the same. There have some fine sand stuck in the water tap and i need to take out the water tap to clean it, if not the water come out very slow. Ask them to check but the problem still the same. Now i am using Aque free and so far so good.

So what is an average household water usage per day? How many person in an average household? There are no figure given so it's like saying a household with 20 person is using as much water as a 2 person household so both only need to change filter at the same time, aka, 12 months. This is ridiculous.

As for pressure drop before change? Drop by how much? 20%? 50%? 90%?. And if you do not have a pressure meter, how do you know how much it has dropped?

Instead, I agree with gkl83. It's either after certain number of months or after how many liters of water had been filtered. For example, it should state 12 months or 5000-liters, whichever comes first.

12 months because if left for too long, bacteria and mold etc can grow on the filter making it bad for heath.

5000 liters because things like active charcoal could have reach it's designed chemical absorbing capacity. AFAIK, there are only 2 models in Malaysia having meters to monitor this. And I would not even consider buying any filter that does not have this built in. Because once filter exceeded it's filtering capacity, water coming out of it may be even more dirty than ordinary tap water. My 2 sen.

If you are interested check with the sales person or 3M, i am user and this information provide to you base on what i gather. I have the manual, but too lazy to read again.

All filter does one thing and that is, remove particle and dissolved chemicals from the water. So it stands to reason that:

1. when all the holes in the filter had been blocked by the particle, you need to clean (eg. backwash) or change the filter.

2. when the filter had reached it's designed chemical absorbing capacity (like Activated Carbon), you need to clean (which can't be done by user) or changed.

And how much particle or chemical that has to be removed is directly dependent on how dirty or how much water has passed through it (therefore you need a meter to measure that). These are all basic Form 5 science. And one can't argue with basic scientific facts.

So any salesman who said 'you need to change filter every 12 months' without understand how much water the family consume is talking nonsense. Or out to make fast money.

IMO, drinking things that can be seen by the naked eyes like mud suspension or sand particle does no harm to our health. But I find many people more per-occupied with removing these.

But drinking what can't be seen like dissolved chemical (some of which causes cancer) or bacteria (that's why I wanted a filter that has UV light) will. Yet I find people not paying more attention as to whether the filter can really remove chemical (like certification by NSF etc) or whether it has reached the end of it's life cycle (replacing them 12 months instead of 8 months due to more people in house). This is wrong priority.

My 2 sen.

This post has been edited by Optiplex330: Jan 22 2012, 02:10 PM

Optiplex now u using amway? Friends, how much is the filter change for amway and is it change every year?

I think Amway's eSpring is rated at 5000 liter per filter. That works out to be about 10 sen/liter filtered water.

Philips has a filter that is almost as good as Amway's at about half the price. But nobody seem to be selling it. That's a real pity.

After re-read the thread 20 pages again, initially wish to go for puregen as before that only saw 1 poor feedback regarding the filter, but right now it seems to be similar problem on the filter performance (strange smell from water), wish to go for 3M but too bad they dont even have a dealer in melaka, alamak... Alphamax also not much retailer...

If you wanted to know the quality of any filter, just go to NSF (National Sanitation Foundation) or WQA website and make very sure they have the proper certification. Much better than asking in these forum or anywhere.

If water has strange smell, it means it can't even fulfill the lowly Standard 42. I will not consider any filter if it does not fulfill Standard 53 and preferably also Standard 55.

Does that mean all filter that requires water discharge is RO including those alkaline water type?


Hi Optiplex330, can help with this questions?

AFAIK, all RO making unit discharges water so it's actually a very wasteful way of making drinking water. It discharges much more than it made. And it's confirmed to be bad for health.

As for alkaline water. I consider that b*llshit science because I have never come across any article written by universities or any health authority saying it's beneficial. The same people who said alkaline water is good also believe there are Martian on Mars. The only exception would be water with high mineral content. Water with high mineral content will naturally be more alkaline and we all know mineral are good for health. But Alkaline water made by other method are all b*llshit.

And because mineral are good for health is also the very reason why W.H.O. organization specifically said water that are devoid of mineral are bad for health and R.O. water is one of them.

My friend recommended Aquasana to me and she said it has NSF53 certification. I guess if people like to boil water, this certification is fine?

Yes. BTW I am curious. How much are they and their replacement filters? If you don't want to boil, try looking for the Philips filter.

Actually I prefer to boil water too. Filtered too clean, difficult to store.
My friend imported hers from US saying it is much cheaper than getting it locally.

Anybody using nesh? Is it good and how is the maintenance cost? For indoor and outdoor filter.

more info about coway water filteration please go to this link. http://brilliantcoway.blogspot.com/

every years +198rm
every 3years +398rm

thx for the info, anyone know which brand in the market that offer the best value for money water filter? for outdoor and indoor unit...

just installed 3M outdoor (AP902) and indoor (AP-DWS1000), water taste nice now..LOL

My fren stay same condo with me, my cosway 1st filter become yellow on 1st day while his 1 still white. ANY IDEAS?

Mine on 1st day:


My fren after 1 month, never clean the filter yet.

actually just install an outdoor sand filter outside to filter all the dirt enough la... just to make sure water is clear... just cook / boil your water before drink... no need buy those expansive and need cartridge change frequently... how i know? i'm water treatment specialist in my factory... we treat underground water as what JBA doing... put many chlorine to kill bacteria...

This post has been edited by kcbyl: Feb 25 2012, 08:15 PM