1 Service Group

For 1 Service Group, reliability, safety, and compliance are the core of every job. We have been serving customers for over a decade, delivering maintenance and installation solutions across the infrastructure, commercial, and industrial sectors. Our team specialises in plumbing, mechanical air systems, and fire protection, providing end-to-end services that keep facilities safe and operational. We work with leading brands and products to ensure durable, long-lasting results, and our licensing and compliance framework underpins every project. As a trusted plumber in Castle Hill, we focus on safe, compliant installations, with a commitment to quality, safety, and measurable outcomes. Servicing Castle Hill, Sydney’s north-west and surrounding suburbs, we bring deep industry knowledge to complex environments and high-stakes operations.

Our services cover Plumbing Maintenance, Water Management, Fire Protection, and Mechanical Air Systems. From system design and installation to preventative maintenance and certification, our offerings are built around reliability and efficiency. We understand the critical nature of infrastructure...