correctness of the Metron water meter water meter indications

Friends,
home breakdown. I have to replace the sub-meter immediately. It is an internal device that does not belong to MPWiK. It is only used to settle consumption between household members.

SO IT DOESN'T NEED TO LEGALIZE IT FOR ANY INSTITUTIONS AND THE SAME SEALS. I CARE ONLY ON CORRECT INDICATIONS
he writes large because as you can see below there are already problems with the correct understanding of the post.

As I have an old Metron model as below a few years ago, but never used, I wanted to ask:
1 is it worth to mount it? Apparently, this series distorted in favor of people collecting water and water companies enumerated them en masse. is it true ?
2 whether after a few years aging should be "legalized" if only in the sense of checking the correctness of indications?

by the way I used the same in another building and I liked the possibility of accurate reading because of additional tips.

All devices are subject to verification for correct indications and possible repair every 5 years, each water meter must undergo periodic inspection - verification of the water meter.
Sometimes it is cheaper to buy a used water meter with legalization.
You will pay about PLN 30 for a 1/2 water meter used with legalization until 2022.

thanks for the speed!

that is, even if it lay unconnected e.g. 5 years should it be checked? the air itself causes any changes?

It is not necessary that he has been damaged from lying down but must have valid legalization
designation for which year its use is legal.
Mark on the seal.

Paweł, but did you read my first post with understanding ??

cramp I wrote that this is to be a sub-meter and no one is required legality for any office etc.!

I have read and if the owner of the connection asks you to legalize what you will do then.
You pay as much as he requests. It is only possible to use in a family without legalization.

I am the sole owner of the above sub-meter and the entire installation behind the MPWiK meter. I have such a layout with other roommates that no one requires seals. just.

I return to the question regarding the "defectiveness of the Metron series". I will be very much obliged for help and answers from people who have experience in this matter and understand the situation.

cynamonik wrote:

I am the sole owner of the above sub-meter and the entire installation behind the MPWiK meter

It changes the approach to the topic, I use Metron water meters
for cold and hot water for 20 years I have never had problems or repairs during verification
it seems to be good proof of the company.
However, there are a lot of negative reviews not only about this company.