its depend on your usage. you are requiring durable machine and according to my experience you should use Amway or Philips. you will pay little more but it will be very durable and long lasting.

Here is how 3M filter looks like

In term of size 3m win :-)

zhilwane, how do 3M filter backwash?

Chance, no back wash.

Filter that are able to remove dissolved chemical can not be back washed. Filter that remove solid like dirt/sand can be back washed.

Nothing is perfect

What is the lifetime or life cycle of the 3M filter?

Today ordered Alphamax POE A840 at RM1799 (Promo Price) + RM89 Indoor Water filter A08T (Cost RM899) + Stainless Steel Valve for free.. How is the deal? Also free installation and 12 month interest free instalment

http://www.alphamaxind.com/wt1.html
http://www.alphamaxind.com/wt2.html

by Capacity. Outdoor Capacity: 100,000 gallons (378,541 liters) Give or take 10%, you know Malaysia water is so clean.

Indoor Capacity: 625 gallons (2,365 liters)

So every month I m using 10m3 water or 10000liter. Put it at 378,000liter / 10000liter = 37.8month. Or about 3 year before I need to change the filter. That is quite longtime.

For indoor, 2person drink about 4liter/day. That is 2365liter/4liter = 591day. Or about 1.5year before need to change the filter.

Wow, you sure know how to safe water. According to Start sometime back, we use 226L per day per person.

But for me, weekday seldom at home, my monthly usage is 13m3 base on the free water bill

I haven't pay a bill since 2008. Syabas still own me rm3.

haha.. But than again, keeping the cartridge filter for too long also not to good. I will change when pressure get drop, that usually happen at 70% to 80% blocked.

Well, got to stress my money long. Pay maintenance for all this is not cheap.

That is why I go for an indoor drinking water filter that has a built in flow meter. Take the guess work out of the equation.

why calculate so much on this? Just take alphamax with backwash will do... low maintenance compare to 3M. Cost wise cheaper as well.

The content of the filter don't need to change? What is the cycle time? How much water do you need to backwash?

nvr think of it.. just told that need to backwash after 7 to 10days..and the size of tank bigger than 3M. And I do not believe the smaller size like 3M, can wait until full year only change filter. Sure the water flow or pressure will compromise.

You are comparing apple and orange. Low maintenance does not mean good filtration. 3m comparison can be with membrane type, sand is just don't match the league.

This post has been edited by weikee: Jun 26 2012, 09:10 AM