Maze?

Looks a bit like a maze with lots of dead ends, but its actually the supply end of our underfloor heating system, which feeds almost a mile of pipework. Problem is like most heatpump/underfloor heating systems it is quite complicated and suppliers/fitters don't seem to fully understand how they work or should be installed. In our case they were unsure where a second circulation pump should be fitted. After a visit and advice from an 'expert' the plumbers moved the pump (the red thing bottom right) to its fourth position since last October. Here's hoping it works properly this time!