
The GMDM series is a hot water multi-jet meter available from 20mm to 50mm. It features a dry dial and magnetic transmission with 360° rotating lid. An optional pulse output is available with programmable pulse weight.
The meters are supplied with meter couplings and a non-return valve as standard, except the 32 and 50mm size which does not come with a non-return valve.
Note that these hot water meters are not Watermark approved.


| Code | connection | Other details |
|---|---|---|
| GMDM-I 3/4 AC | 20mm | multi jet meter (optional pulse device) |
| GMDM-I 1 AC | 25mm | multi jet meter (optional pulse device) |
| GMDM-I 1-1/4 AC | 32mm | multi jet meter (optional pulse device). Not supplied with non-return valve. |
| GMDM-I 1-1/2 AC | 40mm | multi jet meter (optional pulse device) |
| GMDM-I 2 AC | 50mm | multi jet meter (optional pulse device) Not supplied with non-return valve. |
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