The event is organised by Scottish and Northern Ireland Plumbing Employers’ Federation and is widely regarded as a flagship fixture in Scotland’s apprenticeship calendar.
According to data from the Plumbing and Heating Federation only 6% of businesses expressed optimism about the economic outlook.
The apprenticeship combines on-site work and training across plumbing and heating including water, gas and low-carbon technology.
Stephanie Lowe said: “It is clear that a more coordinated, cross-sector approach is essential to building the skilled workforce Scotland needs.”
While trading conditions held steady overall, fewer businesses noted being busier than expected, and a growing number reported experiencing quieter periods.