Which is better? "Membrane Water Filter" or "Sand Filter"type? And why?

Membrane you mean RO system? RO water is pure water. Pure as in empty. Theres no natural minerals.There is no difference between RO water and distilled water(used in car batteries). If you take time to search online, you can find many long-term disadvantages in drinking distilled water.

I would suggest Sand Filter type. If you want more details, PM me.

membrane type is not advisible... after sometimes, the membrane will get choke from the dirt partical and required regular maintenance or replacement...

Like this....
http://nesh.com.my/en/online-store.html?pa...7&category_id=2
or
http://www.youtube.com/watch?v=27bi3Y06m1M

Exactly what i told Jo_da48 and also it will reduce ur direct water pressure a lot.

FYI, this is what i found from the web



http://www.usj.com.my/bulletin/upload/arch...php/t-7636.html

This post has been edited by zheilwane: May 9 2011, 12:11 AM

But are they refer to same product? As the Hydro one is not from Cosway

http://www.hydro1.com.my/p_o_e_h2o.htm

according to him, hydro1 used to b distributed by cosway but that was 2005. May b got some improvement now



This post has been edited by zheilwane: May 10 2011, 02:34 AM

any opinions on Nesh & Coway water filter ?

anyone know where to get activated charcoal, fine sand, etc that is used in normal filters. thinking to diy refill my filter

just get a professional person to do it, RM 280 only

ya..using sand filter with back wash....
quite good...
rm 280 only...didn't include installation...
buy two unit for more secure...
will post the picture for references...
installation cost max is rm 150
mostly rm 100 to rm 120..

hi

just want to know..
does the filter effect water pressure ??

tq

Im using Alken water filter

i'm using Hitachi 1HP pump....
cost around RM 560 include installation
don't need water heather pump...
this pump enough for the whole house
but mine is single story...
with two bathroom

i remember reading an article from the water authority in malaysia..that there is no need to install external water filter...
cause is not good to filter out the chlorine ...which kills the bacteria in our water...
he advise just use a small filter beside your water tap... any comments on this ?

bro, rm280 only? mind to share more info on that? thx ya

lol, y suddenly talk about water pump?

Hmmm...Really no one know what the Pro / Con between this two? Which able to help to make decision which type should be considered?

Sand filter

Pros : Usually cheaper. Can contain activated carbon to remove some of the chlorine, if you want to. Some companies allow you to customise the content. They may have the option of adding zeolite that helps soften water, which in turn increases the efficiency of your washing detergent. Usually you would need to replace media in about 5 years. Periodic backflush helps prolong lifespan. Relatively cheap to replace the media.

Cons : Water is not as clean as membrane, can only filter up to maybe 20 microns. Larger vessel, takes up more space. Typical design of sand filters has a plastic mesh at the bottom of the intake tube that prevents sand media from flowing into water supply. If that plastic mesh breaks over time, sand will contaminate your internal water supply, possibly damaging your appliances etc. Some sand filter vessels are of poor quality, allowing sun light to penetrate. This would make the sand filter a breeding ground for algae, etc. Check the vessel, make sure light cannot penetrate( you can use a torch light and shine from the outside while you look inside).


Membrane filter

Pros : Much cleaner, filters up to around 0.02 microns. Usually takes up less space. Usually has automatic flush ( but it is not a full backwash ). Almost all vessel is made of stainless steel, light cannot penetrate making it less likely for algae growth.

Cons : Generally more expensive. Automatic flush is not a full backwash. You will need to engage the water filter company to do a powered backwash every 1-2 years to clean the dirt accumulated in the membrane (You will be amazed at the amount of dirt they can backwash out ). Automatic flush is not enough, as the accumulated dirt may increase pressure on the membrane causing it to fail. If your membrane is damaged, replacement is quite pricey. Does not filter chlorine, for those who may want to reduce our heavily chlorinated water for health purposes.

Wrong section. Lol. Haha

another cons of membrane it may reduce the water pressure...right?

Hmm yes, slightly. More than sand filter. If your water pressure is at least 2 bar, it is fine.

zelbrite is consider sand filter category? is it safe for drinking directly?

Zelbrite is an alternative to sand in the water filter. They are mostly used in swimming pool filters. Not sure if there are any health effect if used in drinking water filter.

I am using sand filter filter from Filter First. Been using for almost 5 years. So far so good. I bought it as it's cheap, not mistaken RM1k+, budget constrain. However if there's water cut, usually when water supply resumes, incoming water is dirty with whitish particles. Then sand filter cannot filter this. So I usually let water run for some time till it's clear again.

Just close the water inlet to your pump and install a bib tap before the filter. After water rationing, just open the bib tap and let the water flow out.

So sand is better than membrane? In term of mineral wise?

membrane is very fine and gets clog up easily.

Yet to decide which bsand type / brand to go for, where $ a concern too

i think mostly people use sand for external and small membrane filter inside right? double filter

Using Nesh membrane filter for 3yrs now. Following instruction to backwash monthly, it is still running well. IMO, it is compact and got the job done. Malaysia water quality sucks, sadly.

what the different between this pump???
automatic constant pressure with automatic pumps


Attached image(s)

What is the recommendations for the compact outdoor water filter. So many brands. Hydro 1, intact, Neah etc.. any comment on quality and price.