Allan Colquhoun & Sons P/L is a family owned business, established in 1956 and currently managed by 3rd generation plumber Iain Colquhoun. The business offers a wide range of services to Industrial, Commercial and Domestic Clients.
They are compliant with current WHS legislation, hold Dept of Fair Trading Builder's and Plumber's licences, fully insured and accustomed to collaborating on all categories of projects with Builders, Facility Managers, Engineers and Designers.

The business has vast experience to perform the following:

• Water Plumbing
• Hot water replacement
• Drainage
• Gasfitting
• LP Gasfitting
• Metal deck roofing, gutters and downpipes
• H/P water jetting to clear blocked drains
• CCTV drain inspections
• TMV installation, certification and maintenance

For our Commercial Clients:

• Trade waste installations including grease traps, arrestors & dilution pits
• Chemical resistant electro fusion welded waste systems
• Laboratories to all PC standards
• Medical practice suites

And for our Industrial Clients:

• Flow and return cooling systems
• H/P gas installations to boilers, furnaces and process ovens
• Pumped delivery design
• Pneumatic systems
• Ducted extraction systems to AS1668
• Backflow prevention device installation, testing, certification and maintenance.

Allan Colquhoun & Sons P/L are centrally based in Oatley, NSW, and are ideally placed to service clients in St George area, Sutherland Shire, Inner West, Eastern Suburbs and the CBD.