Not that cannot drink, but it's taking more risk basically. Sometimes it happens when bacteria make it to water, like recent case in Oregon, where they use chloramine, much stronger than usual chlorine

Guys, story/question about Panasonic filters...

I have a friend who has this cheap, counter top Panasonic attached to his faucet. Last time I was at his place, tried his water and it had bad, medicine taste.

So I asked him if he changed cartridge ever, and he told me he did just recently. Ok, nevermind.

Then a customer writes to me, asking if our FD will be able to get rid of taste. We pinpoint the problem not to his water, but to... Panasonic filter.

Then I recall that few weeks ago we installed a filter to replace Panasonic. I did not pay attention back then, but now texted the customer. Reply was "the water did not taste well even with new cartridge".

At the same time, not everyone can taste it, but some people definitely can. Conclusion is, most probably the cartridge leaches something into water that gives that taste.... I did not expect this from Jap company, when filter does more harm than good...

Anyone else experienced that with their Panasonic?

Cuckoo/Coway is a bit different, they have a dispenser where water is stored. Yes, made of 304 stainless steel, but still may rust under certain condition, especially hot water dispenser. I experience it drinking hot water from local restaurant's Cuckoo.

Solution is probably to have tankless dispenser, we are trying it now.

But Panasonic has no dispenser, so there must be something wrong with cartridge itself. It is quite difficult to get taste from carbon cartridge though... Not sure how they managed

anyone familiar with this Simbi S1 filter? thankless hot and cold water. thing is , although its easy to change their filter , i prefer under sink solution. can bypass their internal filter and user undersink solution?

Most probably yes, but will require some modifications.

How much is the price for it?


Edit: I checked their price, 4500RM... And looking from the design, probably cannot bypass. Definitely not worth it

This post has been edited by hestati: Jul 6 2018, 01:26 PM

i using the instant 3 sec water heater (25 45 70 80 100 degree Celsius) with bypass, no cold water thou... brought from taobao at rm 250 last year... so far so good...

I think it's 50.

Bro, mind educate us the how to read the model no for Dow Filmtec RO membrane?
Example:-
Filmtec TW30-1812-100
Filmtec BW60-1812-75

I know the last figure is GPD but what's the difference between Tw30 and Bw60? And what's 1812 stands for ?

https://www.amazon.com/Filmtec/s?ie=UTF8&pa...s%2Ck%3AFilmtec

Yes, very simple, yet complicated . TW is tap water, BW is brackish water. Number 60 or 30, it doesn't mean anything as far as I know. I think they had an idea for it before, calling it "new chemistry" but most of their membranes are 30 with exception of this BW60.

18-12 is the size, 1.75" by 11.75 (1.8 by 12 nominal).

At some point I believe they wanted to discontinue TW consumer, but then reintroduced it. People ordering TW30 were getting BW60, was a real mess. I think now everything is back to normal, I would probably recommend sticking to TW, not sure why they messed with BW consumer at first place.

Thank you for the clarification.
Few more questions:-

1) Can I replace my Elken 50GPD membrane cartridge with a 100GPD cartridge ?
2) Since 100 GPD is double the flow rate of 50 GPD, will the filtering efficiency remain the same ?
3) what's the min GPD for a tankless RO system?

Is it okay to use water pump for any water filtration RO system like aquaphor? Which one is recommended? I'm travelling a lot so I hope I can using it anywhere I go

This post has been edited by badminto: Jul 9 2018, 09:29 PM

1. Yes, you can. Will you have real double output? Depends on your pressure.

2. 50GPD is 99% rejection rate, 100GPD is 98% rejection rate, so in theory it will be just slightly less efficient.

3. It depends, some people do it with 100GPD, depends what flow you need. For myself, I would not go tankless with less than 400GPD, 600 even better (this is what I am trying to get for Fresca RO).


One thing though, these inline filters Elken has, even the ones that are from Omnipure are not so great. Ideally, you need better filters to protect RO membrane. It's not an issue for 50GPD membrane since it is relatively cheap, but say 400GPD would be too expensive to change once every 1-2 years because of inefficient pre-filters. In theory, if pre-filters are efficient and changed regularly, your membrane can last forever.

I am a bit confused... Aquaphor is non-RO system, at least the one that is sold in Malaysia. Are you planning to travel with Aquaphor or just with the pump?

Ah, sorry..I thought Aquaphor is RO system. So yeah, I'm planning to bring Aquaphor + pump so I can pump it from water bottle

You can get pretty much any pump, example is the link below (NOT MY LISTING) but that would be a hell of a monster to carry around, plus Aquaphor cartridges are not really meant to go through many cycles like that. Do you already own Aquaphor? I'd think having faucet connector for it is a better idea than pump and I would choose different system if you haven't yet bought Aquaphor. Can make it really compact and efficient if you're interested.

https://www.lelong.com.my/24v-high-psi-ro-w...7-01-Sale-I.htm

Excellent answers !! You are indeed a pro.
Found this graph and it explains exactly what you just said above.


Is it possible for an undersink tankless RO system rely on pressure solely from the main water supply without an electric powered pump?

This post has been edited by aeiou228: Jul 9 2018, 10:00 PM

I'm not buying Aquaphor system yet as I'm still surveying about this. So what's your suggestion for my case?

I believe this only works if there's slight water pressure. It doesnt work on 0 water pressure like pumping from bottle.

This post has been edited by badminto: Jul 9 2018, 10:05 PM

this 1 got already?
the new 3m poe water filter for condo ok?

Thanks for your kind words

Yes, tankless RO can work without a pump, but you better have good pressure for it. If pressure is over 60 psi consistently, then it should work, given your pre filters are high quality with little pressure drop.

Our next system will be Fresca tankless RO. Dow Filmtec now offers residential high flow membrane (450GPD as far as I remember), but cost is quite high. Gotta get it and compare to Taiwanese membranes to decide which one to fit in Fresca.


We got it, though after careful consideration we chose Taiwan made housing and cartridge, since Pentek quality went downhill after they moved production of these big blue housings to China.

I will send you a PM.

https://www.amazon.com/Filmtec-BW60-1812-75...eywords=filmtec
I'm planning to buy the above Dow Filmtec 75GPD RO membrane (US$27.18, Sold and fulfilled by Amazon) to replace my Elken Bio Pure S-250 50GPD RO membrane (RM321 by Elken Malaysia). Do I need to replace the flow resistor to 75GPD as well ? If I don't replace the flow resistor, will it affect the efficiency of the filtration ?

What are the pre and post cartridges that you are planning to fit into Fresca tankless RO ?

Yes, in theory you need new flow resistor. If you do not change that, you are absolutely correct, your efficiency will drop and useful life of new membrane will be decreased. Though it is less critical in our Malaysian water with low TDS. For 75GPD you need, in theory 790mlm, so choose either 750mlm or 850mlm.

Pre filter for Freaca RO will be 1 micron pleated polyester and 2 carbon blocks of 1 micron nominal each. Tankless system does not require any post filter, but we may install Quantum Disinfection as post filter, this would be useful for people who do not use their system a lot, go outstation for 2-3 weeks etc.