Lincolnshire Police have named 41-year-old Polish national Marcin Stolarek as the victim in an ongoing murder investigation in Boston.
The probe relates to the discovery of a body at the pumping station on Chain Bridge Road on the evening of January 12.
Officials at the Lincolnshire force have said significant resources have been dedicated to the investigation.
It is believed the victim died as a result of a sustained assault and his body was then disposed of in the waterway.
They are now appealing for anyone who has seen Marcin in the last four months, or who has information that could help the investigation, to come forward.
Detective Chief Inspector Karl Whiffen, from the East Midlands Special Operations Unit said: “I am appealing for anyone with information about Marcin to get in touch.
“Marcin lived in Boston but also had links to Spalding, and people in those communities may have details that could prove crucial to our investigation.
“Please come forward with information so that we can bring his killer, or killers, to justice.”
Anyone with information can call Lincolnshire Police on 101 quoting incident 313 of January 12.