thanks for your comment bro, waited for long time for puregen feedback, it seems to be troublesome if we need to backwash for every few days.. did you contact puregen to figure out this problem? as they claimed comes with warranty for 10 years rite?

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

warranty 10 yrs are only on the stainless steel body, other are standard 1 yr. Anyhow, manage to get puregen to do the membrane service, rm120. have to monitor the performance this few days.

Thinking of getting perfect steel for my outdoor filter coz it's more affordable. Anyone have any feedbacks so far??

Nope, the 10 years warranty they claimed not the stainless steel model, it is a fiber body type

after service the water quality still suck, something must has went wrong on the membrane, just after warranty expired, what a good timing!

this post already 19 pages and after i have read through, i still cant decide which one to be used....haiz.....

u wan cheap and you wan good ?, what are u basing your decision on ?

haha..i want cheap,good and reliable.....and easy to maintain....

go make your own.. there is no cheap good and reliable..

prices usually go up when its good and reliable..

easy to maintain is the 3m one just change the whole cartridge/filter every year

your out of luck

well, I'm having the Perfect Steel for past one month, even it should having backwash every month, but I just backwash almost every 2 - 3 days for my car porch area.
But the water out from the backwash are damn dirty and need to let it run for at least 2-3 min before get it back to white.
My suggestion is if you have option why not just use the backwash water for other use (except initial few min), clean the floor, car wash...the end result you still get a clean water into your house lol...if too lazy than pay more for auto backwash equipement and clean up every day lol

3M auto backwash?

This is the part I find most funny. If you have a household of 2 people, you change it once a year. But if you have a household of 20 people, you also change once a year? Where is the logic for that? Surely 20 people consume more water than 2 people. No?

+1
same concept with car service, 3months or 5000km which even come 1st...

I using amway indoor water filter, the machine have the timer counter to "force" me change the filter cartridge every 12 months even though it serving 2 adults in my house... but it also have the water usage calculation by litre as the lifespan will shorter if filter more water within 12 months...

Change is per average household usage, hence is it say 12 months once. There is an instruction and recommend change interval. You don't have to change every 12 months if your water pressure is still good. Once is slow down is time to chance.

I know cause I am using indoor and outdoor 3m, and the 3m promoter have advice me on this.

This post has been edited by weikee: Jan 22 2012, 10:02 AM

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?