Single pipe system question

[Margi]

old one had only a single pipe coming out from floor in the middle of radiator and branching to two ends of radaiator. Handyman just fitted the radiator, nothing more. Obviously he was not cunning enough plan it thoroughly.

 

[Reg Man]

It can't possibly work with just one pipe, It requires a flow pipe and a return pipe.

 

[Margi]

Recently 2 radiators that were rusted replaced by 2 new radiators. Baxi engineer replaced one radiator and wanted to come to do the other a week later. So I got the larger radiator replaced by another engineer as my tenant wanted to have system fixed ASAP. Now only one larger radiator is working not the rest of the radiators. Please advise as Heat team refuse to check the system out blaming the other engineer. The system worked fine other wise.

Thank you all. I wanted a cheaper option so balance the radiators as they say. Wow it works, it works