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Popular science post | Why does the TDS value of the first glass of water in the morning appear to be too high? Is it normal?

RO membrane can be said to be the soul of the water purifier.

Its existence is the key to filtering water quality

But many careful friends discovered that

The first glass of water in the morning always has a high TDS value

This is especially the case with large-flux water purifiers.

Could it be that the RO membrane has entered the [burnout period]?

Or is there something wrong with the water purifier?

Don’t panic! Don’t panic!

Today we will discuss this issue!

Because the working principle of the RO membrane filter element is to pressurize the raw water through a booster pump, so that the pure water passes through the RO membrane, and the impurities are blocked by the membrane.

Therefore, when the machine stops operating, the booster pump stops boosting, causing mutual penetration on both sides of the membrane, and some ions penetrate into the pure water pipe.

Therefore, the longer the machine stops working, the higher the TDS value of the pure water in the membrane will be, and the TDS value of the first glass of water released in the morning will increase!

1

Large flow bucketless RO water purifier

The increased TDS value of the first cup of water generally occurs in high-flow barrelless water purifiers.

2

RO water purifier with bucket

RO water purifiers with barrels generally do not experience an increase in the TDS of the first cup of water, because the water filtered by RO water purifiers with barrels is stored in the pressure barrel.

After the cup of water with the highest TDS value in the morning is filtered out into the water storage bucket, it will be automatically diluted by the original pure water, so the TDS value of the first cup of water in the morning with a bucket RO machine will not be high.

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Can I drink the first cup?

Although the TDS value of the first glass of water will increase, this water is filtered. The substances that penetrate and diffuse into the pure water are mainly some inorganic salts, such as calcium, magnesium, potassium, sodium, etc., which are harmless to the human body. of mineral ions.

This kind of water has reached the standard for direct drinking and can be drank directly. If you feel uneasy, you can open the faucet and let the water run for 30 seconds to 1 minute. You can drink it after the TDS value returns to normal!

01

Can be consumed directly

TDS value: 0-50

02

good water quality

TDS value: 51-100

03

Water quality is average

TDS value: 101-300

04

poor water quality

TDS value: 301-600

05

Poor water quality

TDS value: 601-1000

06

Water quality not suitable for drinking

TDS value: above 1000

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How to judge whether an elevated TDS value is normal

So how do we judge whether the increased TDS value is normal or there is a problem with the machine?

1Release the water for 30 seconds to 1 minute and then return to normal

After the water is released for 30 seconds to 1 minute, the TDS value returns to normal, which means the machine is operating normally.

2The TDS value is still high after 30 seconds to 1 minute of draining the water.

After draining the water for 30 seconds to 1 minute, the TDS value is still very high, which means that it is time to replace the filter element of the machine.

Flanne will also be launched in the near future

A high-flow terminal direct drinking machine with zero stale water

Let everyone say goodbye to the problem of increased TDS value in the first glass of water

Stay tuned!

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