Depend on your budget and quality of the water you want for, also long term maintenance for the replacement part. 3M outdoor where need to 2k? I saw previously quotation is just few hundred only. which model you refering to?

zheilwane selling the AP902 are cheaper discount price. The RRP for the AP902 like above said should be RM1099.

Any promotion currently?

Just went to tupperware outlet and check out the price, join member RM70, then the filter will discount 25% slightly below 2K. filter cost RM360 (member price) whie crap alkaline is RM100.
How much is espring filter cost about? including the UV lamp? change duration?

Check for certificates like NSF

can send me your 3m indoor filter info?
replacement filter cost, roughly how frequent to change and cost/L.
thanks.

Talking about water...

http://www.thestar.com.my/News/Nation/2013...y-response.aspx

Anything added over the limit will danger to human. Even things we eat like yellow noodle, "Lou shu fun" over the limit will also kill human. Remember the "Lou shu fun" that kill many children many years back?

Anything expose to sun, better use brass or ss. UV will dergrade the plastic.

Have money, change now. No money, change after it burst.
As long as you everyday use water, nothing will happen. Like my area, the developer using low quality PVC piping, about 75% of them already have pipe burst but mine still ok. I always let the water drip, this is reduce the pressure on the pipes.

Don't worry too much then, use it until it fails.
Want it to last long, don't shut any valves when not in use.

That 1 original from developer? Or you want save cost?  But those PVC valve, better use brass.

How is your renovation?

You got the bypass filter valve also that need to check.