How to choose a water filter : Part 3 Indoor (POU) or Outdoor (POE) Filters?

By now you should be able to identify your water source and the quality of your water. TO learn how to identify your water source and water quality, kindly read our part 1 and part 2 series, How to choose a water filter? Part 1 : Malaysia water source ?  Part 2 : Malaysia's tap water safe to drink?

So, What is a POU and POE Filter?

POU stands for Point-Of-Use. A point-of-use water filter is a type of water filtration system that treats the water at a single tap. POU water filters normally covers fron kitchen top filter, under sink filters, bath filters, shower filters, faucet mount filters and of course water dispensers. POE stands for Point of Entry is where the main pipeline that supplies the water of your house. Normally POE filters would be the ones you see installed outside a premise outdoor water filters or in other words whole house filtration system.

If i have an outdoor water filter (POE), Why should I nedd to invest in a indoor water filter (POU)?

There of two types of POE filters, one is Sand media water filters and another one is membrane filters, both serves the same purpose but it a different package. Performance wise, sand media water filters in the market normally will filter water from 1 to 5 micron, which is good enough for our daily water usage like cleaning, bathing and so on. While membrane filters filter up to 0.1 to 0.01 microns depending on model and brand. However, do note that if you are purchasing a membrane filter do remember to add on a carbon block filter to filter off the bad smell and chlorine by-products. In general, stainless steel outdoor water filters will last you a lifetime, some brands even offer 10 years manufacturing defect warranty on the vessels. For those greyish yellowish outdoor water filters you see by the side of the premise is what we call fibre reinforce plastic (FRP) vessels, these kind of filters do come at a lower cost however be mindful where you choose to install as these tanks are not as weather resistant as their stainless counterpart.

Benefits of installing POE Water Filter Systems:

  • Protect Appliances and Plumbing: Extend the life of household appliances such as washing machines, dishwasher, water heaters, and fixtures.
  • Experience cleaner, ‘better tasting’ water from every tap in the whole house or business.
  • Easy to install: No drain line or electrical connections needed
  • Low Operating Costs: Just perform backwash one a week. Simply replace the filter cartridges/ media when their useful life has been exhausted.
  • Sediment Filters remove dirt, rust, sand, grit, and other suspended solids from water.
  • Carbon Filter Media, Significantly Reduce the Following Contaminants in the entire home or office: Chlorine, Chlorine By-Products - Trihalomethanes (THMs)
  • Removes Bad Tastes & Odours
  • Removes Turbidity (Cloudy Water)
  • Removes Herbicides, Pesticides, & Insecticides
  • Removes Volatile Organic Chemicals (VOCs): Organic Chemicals that turn into vapour

One might ask, since POE filters out all the unwanted minerals and chemicals already, it is safe to drink, why do i need a indoor filter? There is a lot of reasons to why people spend so much on a indoor water filter. Some just want finely polished water up to 0.0001 micron for daily drinking and cooking purposes. Some claim that RO membrane filters can help flush all the toxic waste out of your body. Some buy indoor water filter because they know their water pipe is old and rusty and some water tanks have been hiding somewhere dark on their attic where moulds and algae grows. This is where indoor water filters (POU) comes in.

POU water filters comes in different shape and sizes, most common indoor water would be membrane filters or cartridge filters. For those whom have a little bit of extra money laying around they will go for all in one water filter & dispensers or a Reverse osmosis (RO) membrane filters. Let’s talk about general filter performance of indoor POU water filters. Generally, cartridge or polypropylene (PP) filters can last up to 6 – 12 months with occasional washing of the cartridge. For membrane filters like Hollow fibre filters or RO filters there would be some maintenance required, replacement of cartridge & membrane must be done frequently to ensure filter performance and maintain water quality.

Benefits of installing a POU Water Filter System:

  • Further polishes your water for daily drinking
  • Produces high quality water
  • Small, easy and convenient to install at every tap point
  • Cost effective to install
  • Wide variety of POU water filter choices to fit every need
  • Removes Bad Tastes & Odours
  • Removes Turbidity (Cloudy Water)
  • Removes Herbicides, Pesticides, & Insecticides

You might be overloaded with all the types of water filter that we have mentioned in this blog article. Worry not as our next blog article we explore and discuss in depth on all the common water filter systems there is in the market.

Part 4: Water Filter Types And Their Performance.

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