About Us

Hi, we are WSG Group!

WSG Group Pty Ltd is Sydney’s and the Central Coast’s most reputable emergency and preventative maintenance plumbing, electrical, and roofing company, offering unrivalled experience and expertise.


Three generations of expertise!

WSG Group Pty Ltd is a family-owned and family-operated plumbing, electrical, and roofing business spanning three generations since 1947. It began as Merrylands Plumbing Service, then as Drain Master Plumbing & Hot Water in 2006, and finally became WSG Group Pty Ltd to better promote its specialist service and allow greater geographical penetration.


Mission Statement

Providing people with service they can trust


Vision Statement

To be the premier service company for all plumbing, electrical, and roofing needs


We value



Our team of professional plumbers, electricians, and roofers are trained to respond to emergency situations. Before you know it, our team will have arrived at your doorstep, ready to solve your problem.



We equally give importance to the safety of our customers as well as our plumbers, electricians, and roofers. Our actions and services are guided by the occupational health and safety (OHS) regulations and recommendations, because safety is our priority.



We don’t just do it quick; we also do it accurately. From assessment to installation or repair process, we get the job done efficiently and for a lifetime guarantee of workmanship — leaving you with a big smile!