Why not use a check valve bundled with the meter. Opinion

Recently, there have water meters with a built-in check valve fitting that come in a set of metering devices. By itself, the valve is a good thing, and even necessary, that's why its installation vodopostavlyayuschie companies consider a prerequisite for installing the meter.

Brief valve

The valve will not allow the power flows from the hot water pipe in the cold, and vice versa, will not zavozdushitsya the system will play the role of additional protection of the boiler from dehydration at fault regular subversive valve.
And also it can be used to assemble a system in which the water will only move in one direction, e.g., a backup water supply structure.

A mechanism in the fitting

But the fact that manufacturers put in the meter socket, can hardly be called a full-fledged mechanism, which for a long time is ready to perform its function.

This structure consists of three plastic parts flimsy one spring and two rubber O-rings.

Not only that, all of thin plastic, so this mechanism more and zauzhivaet internal diameter of the union. Therefore, the installation of metering devices, always disassemble this toy and install a separate valve in a brass body.
This here is an opinion, and you have had experience of operating this mechanism, I canI am exaggerating the problem?

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