The symbol, which looks like the letters HR or HA, is probably a stylized combination of the letters UJ, which symbolize the manufacturer Ulefos Jernværk, which now belongs to Ulefos NV.
Odense Vandselskab is the oldest water company in Denmark (founded in 1853), now called VandCenter Syd.
The letter V stands for water (VAND in Danish or Vatten in Swedish)