Membrane degradation? Normal use is 3-5 years. This filter can only withstand 4 bar max. Add a sediment pre-filter such as the Secure water filter which is back washable by a twist of the filter body. Bro weikee uses that for his mother's house. Search this thread for aeiuo228's post. You can still have the membrane optionally after the Secure water filter. This way it doesn't have to deal with sediments which should reduce biofouling and should lasts 7 years. The other way is to move the membrane after tangki and water pump but have to ensure pressure cannot exceed 3.5bar and if it bursts measure, must be in place such the it had a safe place to leak to without causing a flood on the roof.
Thanks a lot for the info. I think i should change the membrane or change to new unit. How shall i know water pressure bar like 3.5 bar or 4 bar? I attached the outdoor water filter. I don't even know what brand is it.
Thanks a lot for the info. I think i should change the membrane or change to new unit. How shall i know water pressure bar like 3.5 bar or 4 bar? I attached the outdoor water filter. I don't even know what brand is it.
Water pressure gauge affixed to the piping before or after or both sides will indicate the pressure on those side installed. Most pasang after but there are those who insist will pasang 2 sides but rare.
The gauges will measure in Bar, Psi, k/MPa depending but just memorize the rates will do: 1bar = 100kPa = 0.1MPa or approximately 14.503775psi.
Most likely the membrane is worn out. Normally it's recommended to change after reaching 5 years. To protect its service life, the filter like I mentioned earlier would be used as it's pre filter. But because others find the water clean enough at 1 micron, they find it that it's good enough. If you prefer it cleaner (I would) 0.01 micron is still ok for what it protects e.g. shower heads, tap aerator, washing machine, water pump, solar heater, drinking water filter, etc.
To ensure that the pressure do not exceed say a predefined threshold say 4 bar, you can pasang what's called a pressure reducer valve. Some pressure limiter /reducing valves can set between 2.0-4.5bar depending upon application. Solar water heaters or centralised water heaters in their manual will say not to exceed a certain limit and that's where they are installed usually at their inlet side. Some models also come with water pressure gauge affixed.
Also, if your home is near the water utility pump house, like just downstream of it, expect stronger pressure.
Match gauges and valves according to inlet piping diameter which usually is about 3/4" (DIN 20) nominal plumbing thread (NPT) size. Your plumber can advise what's to be used for your installation's case.
Also, I would advise that the piping (from meter to filter and filter to indoor after meter) to use HDPE rather than PVC. HDPE has higher thermal stability. PVC softens in excess of 45°C. If you can shade the filter area, all the better.
This post has been edited by halcyon27: Sep 27 2018, 02:46 PM
Water pressure gauge affixed to the piping before or after or both sides will indicate the pressure on those side installed. Most pasang after but there are those who insist will pasang 2 sides but rare.
The gauges will measure in Bar, Psi, k/MPa depending but just memorize the rates will do: 1bar = 100kPa = 0.1MPa or approximately 14.503775psi.
Most likely the membrane is worn out. Normally it's recommended to change after reaching 5 years. To protect its service life, the filter like I mentioned earlier would be used as it's pre filter. But because others find the water clean enough at 1 micron, they find it that it's good enough. If you prefer it cleaner (I would) 0.01 micron is still ok for what it protects e.g. shower heads, tap aerator, washing machine, water pump, solar heater, drinking water filter, etc.
To ensure that the pressure do not exceed say a predefined threshold say 4 bar, you can pasang what's called a pressure reducer valve. Some pressure limiter /reducing valves can set between 2.0-4.5bar depending upon application. Solar water heaters or centralised water heaters in their manual will say not to exceed a certain limit and that's where they are installed usually at their inlet side. Some models also come with water pressure gauge affixed.
Also, if your home is near the water utility pump house, like just downstream of it, expect stronger pressure.
Match gauges and valves according to inlet piping diameter which usually is about 3/4" (DIN 20) nominal plumbing thread (NPT) size. Your plumber can advise what's to be used for your installation's case.
Also, I would advise that the piping (from meter to filter and filter to indoor after meter) to use HDPE rather than PVC. HDPE has higher thermal stability. PVC softens in excess of 45°C. If you can shade the filter area, all the better.
Appreciate for your knowledge sharing! it really helped me alot. Thanks & cheers sifu....
Appreciate for your knowledge sharing! it really helped me alot. Thanks & cheers sifu....
No worries. You have to go back to membrane water filter seller and verify if the max pressure for the inside filter is 3.5 or 4 bar. Most membrane made of PAN should be 3.5bar. Rarely can it withstand 4 or 4.5 bar except the pressure vessel which can take more. There is another type of membrane media called PVDF which withstands fouling better but it's pricier. Last time a company called Euroflex(?) used to sell and they have their own booth outside Ace hardware but they are no longer around.
This post has been edited by halcyon27: Sep 27 2018, 04:03 PM
'si'm using 3M Outdoor Water Filter AP902 + 3M Indoor Water Filter AP Easy Complete for 4 years already. Change the filter every year. The sign of time to change is that the water coming out from the indoor water filter's tap will become slower and slower. Normally, after a year this will start but somehow since early this year, it become slower ( worse than before ) at around 6 month after changing the filter. Anyone know what is the problem.. Now it's like the only way is to change the filter but this is become a costly way to do.
Since my outdoor water filter installed, the water flow at kitchen become unsteady. Sometimes will get small, reopen the water tap few times only back to normal flow.
Since my outdoor water filter installed, the water flow at kitchen become unsteady. Sometimes will get small, reopen the water tap few times only back to normal flow.
Since my outdoor water filter installed, the water flow at kitchen become unsteady. Sometimes will get small, reopen the water tap few times only back to normal flow.
Anyone know what happened? Thank you.
Air block? Turn on another tap along the same plumbing line like washing machine or floor washing tap in the backyard.
Joined: Jan 2008
From: Builders Hardware Enterprise 0362572412
QUOTE(jagjag @ Nov 6 2018, 04:31 PM)
'si'm using 3M Outdoor Water Filter AP902 + 3M Indoor Water Filter AP Easy Complete for 4 years already. Change the filter every year. The sign of time to change is that the water coming out from the indoor water filter's tap will become slower and slower. Normally, after a year this will start but somehow since early this year, it become slower ( worse than before ) at around 6 month after changing the filter. Anyone know what is the problem.. Now it's like the only way is to change the filter but this is become a costly way to do.
Ap easy complete recommended to change ever 6 months as labelled on the cartridge.
U change both filters yearly? most ppl dont change AP902 yearly, hence water is getting dirtier and AP EASY getting clogged faster.
If u r not staying in a condo, i suggest u change AP902 to an outdoor filter with backwash, also change AP EASY if u wanna save on maintenance cost.
AP902 replacement is RM 600 AP EASY REPLACEMENT is RM 300
cost per year is RM 600 + (RM 300 x2) = RM 1200, isnt that too costly?
ie :
Get A sand filter + Aquaphor eco indoor filter = RM 2299 + Free replacement x 1 set
First year : RM 2299 (Before trade in Promo) Second year : FREE Third Year : RM 420 Forth year : RM 420 Fifth Year : RM 420 + RM 380 (sand replacement) Total RM 3939 for 5 years
If continue with your current filter is RM 1200 x 5 = RM 6000 almost 50% saving. Save more with trade in promo
Sand Vs AP902 Filtration wise AP902 is better and quite consistent if u change it every year but sand can backwash hence you dont need to change every year. If u wan better filtration get MEMBRANE FILTER, they are the cleanest but not recommended if ur incoming pressure is weak. Recommended 2bar to 2.5bar is sufficient which most housing area do have.
AP Easy Vs Aquaphor AP easy consist of a small carbon block with filtration of 0.5 micron, hence recommend to change 6 months compared to other 3M model (1 year). Aquaphor consist of 3 cartridges (2 bigger size carbon block + 1 hallow fibre memrane) with filtration 0.1 micron. So changing it = an upgrade in water quality and reduction in maintenance cost
If u are staying in a condo, unable to install those big filters with backwash, then add this (as per video for RM 150) before your AP902 to pro-long the lifespan and change AP EASY to upgrade the filtration and lower maintenance cost.
This post has been edited by zheilwane: Dec 7 2018, 07:51 AM
Joined: Jan 2008
From: Builders Hardware Enterprise 0362572412
QUOTE(aspartame @ Dec 7 2018, 04:32 PM)
oh ok...meaning you back wash 10 -15 min, then rinse 10 min..then back wash maybe 5 min....then lastly do you rinse again?????
Thanks!
I backwash 10-15min until water clear, switch to rinse 1 min, then switch back to backwash, sometimes water turn yellowish, then i let it backwash awhile may b 2 min til clear again. then rinse. Rinsing usually few minutes only, then water is clear nt as dirty as backwash
Sep 27 2018, 01:41 PM
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