I was using Diamond POE filter but after a while the water pressure gets lower which I think is because of the cloth/membrane so I had a stainless steel outdoor sand filter installed 4 years ago. Under my kitchen sink I have a double housing 1 micron PP filter connected to my drinking water dispenser (0.001 micron) and kitchen faucet. Another PP filter is installed for my washing machine.
I paid about RM2100 for the outdoor filter, the PP filters for the kitchen and washing machine and the RO water dispenser. The water dispenser uses Omnipure filters and Filmtec membrane. I think there are USA made.

Maintenance wise, I change/service the outdoor filter every 3 years and it cost me about RM350.00 each time. The PP filter is RM9.00 each, which I change every 3 to 4 months. There are many PP filters in the market some as cheap as RM10.00 for 4 pcs. to RM20.00 per pc. The PP filters that I am using is 140g which is harder. The water dispenser has 3 filters and 1 membrane. the 3 filters need to be changed every year and it cost me RM250 for 3 omnipure filters whereas the membrane is changed every two years at RM240.00. S it works out to be RM 540 per year..

-Please comment if the maintenance cost is acceptable. Should I change the filtration system?

Thank you platinum for your comment. Wont pp filter at the main reduce your water pressure?

I got this for RM890.00 with standard installation. Better than the Diamond POE filter

we installed 3 units between my relatives & friends. That is why cheap la

This new POEfilter made the PP filters redundant and my water dispenser internal filters last longer. The cost to replace the UF membrane for this new POE filter is RM385.00 every 2 years. I would think that my overall maintenance would very much reduced compared to using the sand type filter.