If I recall correct, the sale personal indicated the filter need to change every 1 year or when you found the air pressure drop...and it damn costly on the filter...somemore didnt have back wash...

actually for cartridge changing, the correct way should be according to the filtered volume or used duration whichever comes earlier

This post has been edited by leeyung: Nov 20 2011, 10:37 AM

Do backwash need to change filter? Or longer duration use?

For backwash one, the sands inside the filter will rearrange and washing themself, after that it will arrange back to its filtration layers accordingly, but the drawback is you are wasting the water to wash it only Nothing to change, this is what the salesman told me

This post has been edited by leeyung: Nov 20 2011, 03:58 PM

Why it waste water if the water can remove/wash the dirt out? So does the sand need to be replace after sometime when it no longer can filter?

Water is still cheaper than replace the filter.

Because you need to let it run for 15-20minutes for washing, so it is wasting the water lor The one I asked is puregen and the sands for outdoor unit no need to replace, I look at their website, they patented their sands for outdoor units, and the salesman also inform me the outdoor unit comes with 10years warranty, NSF standard 42 according to my previous study, now duno ada increased or not

This post has been edited by leeyung: Nov 20 2011, 04:27 PM

Sand filter don't filter very good. My parent house had this problem and we change to membrane type. And is bulky.

FYI, Sand need to change every 2 or 3 years. And is not very clean filter. Try take out the sand after 2 years. Is black / greenish and very slippery.

Want to have good water, change the gov lah. In some country water can drink direct from tap not here.

Haha, then we have to vote for change

Well, if any filter didn't require to change, that you could just think whether it possiable or not lol
If you do installed those Cheap type (Transperent type), after two weeks the filter will be brown colour. Imaging two years down the road what will be happen.
Sand filter does required to changed every 2-3 years time but cost around RM200-300, which believed still cheap compared to other. o keep inmind this also already have back wash function lol...

Any dirt trapped inside need to be remove. Back wash won't clean 100%, and sand is not going to filter it good.

weikee,

The 3M filter system (indoor + outdoor) that you have is not the drinking water filtration system right?

I am also having short experience with Bacfree (sand/stone filter), not sure how is 3M companre to Bacfree

Indoor direct drink. No boiling required.

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Added on November 21, 2011, 12:02 pmPrevention on the roof.



This post has been edited by weikee: Nov 21 2011, 12:02 PM

Cool, which no electricity is require . Do you mind to PM me the model that you are using?

This post has been edited by cvshi515: Nov 21 2011, 09:49 PM

This one.

http://solutions.3m.com.my/wps/portal/3M/e...2D0IMBP0SFB3GO3

You just ask your contract Brush it or how it work? Once apply how long will need re-apply again?

Is already on roof so I buy the pump spray, ask the contractor to spray on all the wood on the roof when it was without plaster ceiling. It absorb like sponge because the wood was very dry. Minimal use 3 can, but i brought extra for him to reapply on the thick trust.

Now since before i move in, I do another time on my own. One can for major/thick trust.

Think maybe 5 years apply once. Or maybe 3 not sure.

If all the wood on the floor just, instruction is soak it.

Thanks again for the info. I will check with the retailer whether there is any promotion currently.

This post has been edited by cvshi515: Nov 21 2011, 09:48 PM

Floor and cabinet is all done.

Floor




Stairs




Dry kitchen with Solid top.




@ Wet kitchen


TV Cabinet, still need polish and finishing.


Room


Between master bedroom & Washroom

All nicely done! Looks great with all the smooth progress, btw I am just curious about the flooring, what made you decide to go for wooden floor? any other reasons?

This post has been edited by leeyung: Nov 24 2011, 08:14 PM

What floor?