> For the complete documentation index, see [llms.txt](https://help.immodio.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.immodio.app/en/anleitung/einnahmen-und-ausgaben/buchhaltung-erweiterung/10006110-miete-eichung-wartung-fuer-wasserzaehler-umgelegt-auf-mieter.md).

# Rent, calibration and maintenance of water meters (recoverable from tenant)

Help on the Immodio entry item Rental, calibration and maintenance for water meters (recoverable from tenant).

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Use this category for costs incurred in connection with **water meters** which are to be recovered from the tenants according to the statement.

These include, for example:

* the rental or leasing of water meters
* the costs of using water meters or of making them available for use
* calibration costs, or the costs of replacement where this takes place instead of a necessary calibration
* running service or maintenance costs for water meters

The costs of water meters are part of the costs of the water supply under Section 2 no. 2 BetrKV.

#### When to use this category

Choose this category where you have an invoice or a statement showing costs for **cold water meters** or general water meters.

This category belongs to the water and waste water area. It is **not** intended for heating meters, hot water meters within the heating and hot water statement or other types of meter.

{% hint style="info" %}
Under the German Measurement and Calibration Ordinance the calibration period for cold and hot water meters is currently **6 years** as a rule.
{% endhint %}