GMDM-RFM is a multi-jet water meter that can be installed directly to a wired M-Bus.

  • DN25–50
  • For cold and hot water

Certified mounting positions

Certified mounting positions
Installation guide




Cold water meters max +30 °C

SizeInchModelLenght L (mm)Permanent flow rate Q3Product code
DN251"cold water26010 m³GMDM-MB-25KV
DN321 1/4"cold water26010 m³GMDM-MB-32KV
DN401 1/2"cold water30016 m³GMDM-MB-40KV
DN502"cold water30025 m³GMDM-MB-50KV
DN50 with flange2"cold water270/30025 m³GMDM-MB-50KVF-300

Hot water meters max +90 °C

SizeInchModelLenght L (mm)Lenght L (mm)Product code
DN251"warm water2606,3 m³GMDM-MB-25VV
DN321 1/4"warm water26010 m³GMDM-MB-32VV
DN401 1/2"warm water30016 m³GMDM-MB-40VV
DN502"warm water30025 m³GMDM-MB-50VV


SizeInchModelProduct code
DN251" x 1 1/4"connectorRAC25
DN321 1/4" x 1 1/2"connectorRAC32
DN401 1/2" x 2"connectorRAC40
DN502" x 2 1/2"connectorRAC50