Backflow Prevention in Singapore

Updated on Tuesday 12th December 2017

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Backflow represents an unwanted reversal of the water flow or water mixtures and other residues coming from any source, like used water, industrial fluids, gasses or any substances which do not represent potable water, inside the distribution lines of the potable water system. 

In this article, our plumber in Singapore explains how to effectuate a backflow prevention in Singapore.
 

What is a backflow prevention device in Singapore?


A backflow prevention device in Singapore usually consists of a couple of mechanical check valves which do not allow the dirty water to flow back into the potable water supply in case the water pressure unexpectedly or suddenly changes.

If it is appropriately maintained and set up, this type of device will maintain the potable water clean and without contaminants.

Another type of backflow prevention device which can be used by our plumbers in Singapore is to provide an air gap.

An air gap is an open vertical space which is located between the device which connects the plumbing system, such as a valve or a faucet, and any location where the dirty water could gather or reside.
 
A simple air gap does not have any moving pieces, other than the flowing water. A lot of plumbing codes require a minimum air gap distance needed for different situations, like a drain connection for a dishwasher.
 

Why use backflow prevention in Singapore?


Our plumber in Singapore strongly recommends you to use a backflow prevention in Singapore because, in many situations, there can be cross-connection hazards.

For instance, one end of the garden hose can be attached to the water system in a home and the other can be put into a bucket of herbicide.

Then, a sudden loss of water occurs in the main water pipe which is providing the water for the home, like a water main break or large water volumes coming from a fire hydrant.

This pressure drop causes a reverse flow in the water pipe and, in a Singapore plumbing system without a backflow prevention, the insecticide from the bucket is pumped into the drinking water of the home and, possibly, into the main water pipe which is serving the entire community.

However, with a backflow prevention device set in place in Singapore, this can be avoided and the herbicide would not contaminate the main water pipe.

In case you would like to know more about what backflow in Singapore is, or for any plumbing services in Singapore you might request, please contact us.

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