You should start by looking at the capacity. You should know that most of the purifiers always come with tanks to store the purified water. One thing that will greatly influence the capacity of the tank is the size of your family. For example, if you have a small family you can choose a tank of 4-7 litres in capacity and 10 litres for big families. Another thing is that we have some automated water purifiers which can detect when the volume of water goes down and refill it. With this you will be free from purchasing the wrong purifier.
Not only that but you should also check if it is electric or non-electric. This is necessary due to the fact that there are some environments that does not need a particular type of purifier like places with power interruption will be better with the ones that can operate without electricity. Such places can be well served with gravity based water purifiers since they don’t need electrify to operate. Not only that but their maintenance cost is also not that high. Another thing is that electric purifies tend to be more efficient in purifying water than the non-electric purifiers.
Apart from that, you should also consider maintenance and after sales service. You should know that maintenance is something necessary for all the equipment. Without maintenance the water purifier will not work as required. Normally, the supplies of the water purifiers always provide you with free or affordable after sales service. You should also know that the cost of maintaining an electric water purifier is much higher than non-electric.
In addition, you should also consider installation and a warrant. You find that there are some companies that will provide you with free installation services. This is because there are other companies that will bill you a lot of money on the installation. It is better to buy water purifier with a warranty as you will be able to return it when it is not working properly.
Apart from that, you should also check warranty and the ratings. One thing that you should know is that when you want the best water purifier you should choose the one that is highly rated. In addition, you should also consider online reviews as they will give you chance to go through some of the customers comments about different types of water purifiers. With many positive reviews you will be in a position to know that the customers are comfortable with that particular equipment.