Cold Water Meters (Threaded, DN15–DN50)

A cold water meter measures drinking and domestic water from the mains in cubic meters; it is used as the utility meter for apartments and businesses or as a submeter inside a building. This category includes Klepsan’s dry-dial multi-jet KVS-K series (DN15–DN50), 110 mm short type, Aqua Plus and İSKİ models, as well as the single-jet CEM KT13 and Zenner ETKD DN20 meters. For the hot water line of a central heating system, see the hot water meters category.

What to Look for When Choosing a Cold Water Meter

• Water temperature: Klepsan cold water meters are made for water up to 50 °C, and the Zenner ETKD for the 0.1–50 °C range. The CEM KT13 is produced in different temperature classes (T30–T90), so check the T class on its label.
• Size and body length: DN20 meters come in three lengths: 110 mm (Klepsan KVS-12K, CEM KT13), 130 mm (Zenner ETKD) and 190 mm (Klepsan KVS-2K). When replacing an old meter, measure the space between the couplings.
• Installation position: The Klepsan catalog specifies horizontal installation. The Zenner ETKD can be installed horizontally or vertically (R80 horizontal, R40 vertical); the CEM KT13 works in any position, with an R value of R80/R100/R160 horizontally and R40/R50/R63 in other positions.
• Remote meter reading: On our website, the Zenner ETKD can be selected with a 1 L pulse, M-Bus or wM-Bus module. For Klepsan, a pulse output is optional on the KVS-2K and the DN25–DN50 models; for the CEM KT13, the manufacturer offers pulse, M-Bus, wM-Bus/LoRaWAN and NB-IoT modules as accessories.

Models: Size, Q3 and Body Length

Each model and size is listed as a separate product. By size: DN15 · DN20 · DN25 · DN32 · DN40 · DN50.

Values are taken from the manufacturers’ catalogs and data sheets. Klepsan threaded meters have a maximum operating pressure of 16 bar and an IP68 protection rating; the catalog lists R80, R100 and R160 options.

Meters for Water Utility Connections

For a meter installed on a utility (mains) connection, the required flow rate, temperature and pressure ratings are set by the water utility that installs it (MID, MI-001). If you are buying a meter for a new connection or to split a shared supply into individual meters, check your local water utility’s current requirements in advance. As an example, we describe this process for Istanbul on our Water Meter Separation and Individual Subscription page.

Periodic Re-verification

Re-verification intervals for cold water meters are set by national regulations and differ from country to country. Check your local regulations for periodic re-verification requirements. The meaning of the Q3, R and M markings on the meter and a size table can be found on our Water Meters page.

Frequently Asked Questions

Can a cold water meter be used for hot water?

No. Klepsan cold water meters are made for water up to 50 °C, and the Zenner ETKD for water in the 0.1–50 °C range. On the hot water line of a central heating system, use a hot water meter rated for up to 90 °C.

What is the difference between a 110 mm short-type and a 190 mm cold water meter?

The Klepsan KVS-12K (110 mm) and KVS-2K (190 mm) have the same size (DN20) and the same permanent flow rate (Q3 2.5 m³/h); the main difference is the body length. The choice is determined by the length of the installation space, excluding the couplings. Of the two, the catalog lists a pulse output option only for the KVS-2K.

What is the difference between single-jet and multi-jet water meters?

In a single-jet meter, the water strikes the impeller through a single channel; in a multi-jet meter, it strikes through several channels around the impeller. In this category, the Klepsan models are multi-jet, while the CEM KT13 and Zenner ETKD are single-jet.

How often does a cold water meter need to be replaced?

It depends on the country: periodic re-verification and replacement intervals for water meters are set by national regulations. Check your local regulations for periodic re-verification requirements.