These are some images from the DIY installation in different setup.
So far the best double DIY filter is the Pensonic coupled with a panasonic. The PPM reading is around 18 compared to standard tap water here of 21.
If you are looking at those tap counter twin filter, get a pensonic. The other two brand i tried has quality problem, pensonic even provides an adapter for inner thread, something which i cant even find in a DELCOL rm 598 unit. Duh...but the Delcol unit remains to be tested, if you remove the "mineral" canister, u can get a discount from Delcol, the ceramic filter as the first filter is very interesting. Also the plastic container of the pensonic is clearly thicker and superior compared to Nishimen.
Let me re-iterate my advise :-
1. Do not use the carbon block that is provided in Pensonic or any other brand that is normally sold in Tesco, Carrefour, Jusco etc. Use BOTH sediment filter . Discard the carbon block.
Depend instead on the Panasonic Filter (refer to my posting on Twin filter + combo) which is purely carbon activated filter. So you join the output of the Pensonic Twin filter to the input of the Panasonic Filter.
Reason : ALL the carbon blocks i have tested and it INCREASES the PPM reading of the water even after days of using. Flushing for 20 seconds or so will bring it down but it wont even reach the level of PPM that you normal pipe water is. That means SOMETHING is diluted to the water from those carbon block and i dont know whether its some bad chemical or sugar from coconut carbon that most of these blocks are made of.
The new alternative that i am interested to look into is the Philips water filter, comes with UV and the double filter. The filter will cost Rm 120 but not so sure about the UV. This is a good buy considering the NSF rating is true unlike diamond/nesh. Basically what you have is Amway water filter equivalent with a fraction of its price.
Twin filter alone increases PPM due to the carbon block.
Pensonic Twin filter comes with inner thread adapter :
Direct the output of the twin filter (using both sediment filter) to the Panasonic as seen here: