Actually less than 90 USD if one has lower budget and don't mind TB. The basic materials used are safe lah.....Polypropylene, Polyethylene. No BPA, BPS, BFS and all that. Not a painted pdt also. Same thing goes to the MIC air purifiers.
For those who are interested, can use this. They sell the accessories too, like hoses, PP 1 or 5 micron sediment filters to pre-filter so that the life of the main filter is extended if you are aiming for a 2-housing filter. You can get from other sellers as well coz there are other variations of PP sediment filters like variable pore size filters that changes from 10 microns to 1 microns as the water flows through the filter.
Actually if you are aiming to boil the water to 100 deg before drinking so that any bacteria is killed, it is very safe to "push" the KDF/GACC/AA filter to 12 months (manufacturer's capacity is 500 gallons 6mths).
TIP
Amazon has CITISG promo code till 30 June, 15 USD disc.
If the item is for PRIME members, just sign up for PRIME foc for 30 days, after buying it remember to cancel your membership so that it's zero charge
It cannot be checked out directly via the official Taobao forwarders due to keywords restriction. However just go to the official Taobao thread here and ask how to buy stuff via 3rd party forwarders like Ezbuy/Camilize.com etc.
They have buyforme services, very easy to checkout.
http://forums.hardwarezone.com.sg/e...taobao-buying-guide-part-8-a-5536932-143.html
https://item.taobao.com/item.htm?spm=a1z0d.6639537.1997196601.491.1bBMEe&id=19174164993
I'm not really into RO hence i can't offer any in-depth advices. There probably are others here with in-depth knowledge on RO but they are not seeing this thread, yet.
I'll see if i can dig out anything regarding the water pressure needed for RO systems.