Le Grande Plumbing is an established Esperance plumbing and gasfitting business servicing residential, commercial and construction clients throughout Esperance and surrounding areas. Operating since 2007, the team provides plumbing maintenance, new homes and renovations, gasfitting, hot water systems, drainage, stormwater and commercial plumbing services. As a member of The Master Plumbers and Gasfitters Association of WA, Le Grande Plumbing combines strong regional experience with professional, compliant workmanship suited to the needs of local homes, businesses and regional properties.
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Koormal Contracting is Western Australia's largest Indigenous-owned plumbing contractor based in Bunbury, delivering specialist plumbing, gas fitting, civil drainage and asset maintenance services throughout regional and remote Western Australia. The company services the commercial, utilities, mining and government sectors, combining technical expertise with a strong commitment to Indigenous engagement, culture and community outcomes. Owned and operated by Gavin "Possum" McGuire and Michael Jones, Koormal Contracting brings together more than 50 years of combined experience in remote and regional project delivery. The business has built a reputation for quality workmanship, safety, reliability and successfully delivering complex infrastructure and maintenance projects across Western Australia.
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Six Star Projects is a proudly Indigenous-owned, Supply Nation-registered plumbing and renovation company servicing Perth, Peel and the Wheatbelt. With more than 50 years of combined industry experience, the team specialises in plumbing maintenance, gas fitting, hot water systems, commercial plumbing and complete bathroom renovations. Known for exceptional customer service, quality workmanship and strong community values, Six Star Projects delivers professional solutions for residential, commercial and industrial clients. Their commitment to communication, reliability and attention to detail has earned them a strong reputation as a trusted provider of plumbing and renovation services across Western Australia.
Family-owned plumbing and gas fitting business in Carlisle, looking after homes, strata and commercial properties across Perth and Peel since 2002. Winner of Outstanding Service & Trade at the 2026 Perth & Regions Local Business Awards, and the 2026 Australian Small Business Champion for plumbing.
World of Plumbing and Gas Pty Ltd (WOPAG) is a family-owned and operated business formed in 2012. We are a team of fully qualified and professionally trained plumbers and gas fitters servicing residential and commercial customers in Landsdale and surrounding areas in Perth. With over 20 years’ experience, our business grew from servicing our family, friends, and neighbours to partnering with trusted builders for large commercial plumbing and gas installation, maintenance and renovations projects. We work closely with other contractors and suppliers to complete projects on time and deliver excellent results. World of Plumbing & Gas is fully insured and a member of the Master Plumbing Association of Western Australia, ensuring that all our plumbers and gas fitters are OH&S trained and compliant with safety regulations. Our commitment to our clients is to provide exceptional plumbing and gas services through quality workmanship, affordability, and reliability. Our approach to emergencies makes us a good choice in handling plumbing and gas services.
GXR Plumbing & Gas is a Western Australian family-owned and operated plumbing and gas fitting company providing high-quality residential and commercial plumbing services throughout the Perth metropolitan area. Established in 2013 and backed by more than 20 years of industry experience, the company has earned a reputation for reliable workmanship, honest pricing and exceptional customer service. GXR Plumbing & Gas specialises in plumbing maintenance, blocked drains, leak detection, gas fitting, hot water systems and emergency plumbing services, delivering prompt, professional and long-lasting solutions for homes and businesses.
Wacomm Plumbing is a Western Australian plumbing contractor providing reliable plumbing and gas services across residential, commercial, and industrial sectors. The company specialises in maintenance, repairs, installations, drainage, hot water systems, and general plumbing solutions, with a strong focus on quality workmanship, safety, and customer service.
Gas Tap Plumbing is a Bibra Lake-based plumbing and gas fitting business servicing residential, commercial, construction and local property clients across Perth’s southern suburbs and surrounding metropolitan areas. The business provides practical plumbing and gas support across domestic maintenance, drainage, gas fitting, backflow, housing construction and renovation-related plumbing work. As a Master Plumbers member, Gas Tap Plumbing is positioned within the Western Australian plumbing industry as a professional provider supporting homeowners, builders, businesses and property owners with reliable plumbing, gas fitting, maintenance and installation services.
Lupica Plumbing & Drainage Specialists is a trusted family-owned plumbing and gas fitting business servicing residential, commercial and development clients throughout the Perth metropolitan area. Established in 1978, the company is recognised for its quality workmanship, reliable service and extensive experience in new housing, commercial developments, subdivisions, strata projects and plumbing maintenance. With more than 45 years of industry experience, Lupica Plumbing & Drainage Specialists delivers practical, cost-effective plumbing solutions backed by experienced licensed tradespeople, modern equipment and a long-standing commitment to customer satisfaction.
ASA Plumbing & Gas is a local, family-run plumbing and gas fitting business based in the Geraldton region of Western Australia. The company provides plumbing and gas fitting services across residential, commercial, maintenance, construction and renovation work, backed by more than 20 years of plumbing and gas fitting experience. With a focus on “service you can trust,” ASA Plumbing & Gas supports clients with general plumbing, gas fitting, hot water systems, drainage, roof plumbing, domestic maintenance, commercial maintenance and after-hours emergency support. The business is also listed as a Master Plumbers member, with service categories including commercial construction, commercial maintenance, domestic maintenance, drainage, gas, gas servicing, hot water systems, housing construction, renovations and roof plumbing.
Plumbing installation where more than one business is affected
A commercial plumbing installation can be more complex when a building or site has multiple tenancies, businesses or occupancies. What appears to be a contained job may connect to infrastructure shared by neighbouring occupants, a building manager or a wider commercial complex.
Multi Commercial Installation sits within commercial and industrial general plumbing. It relates to installation work across multi-tenanted settings, where planning for access, approvals, service interruptions and ongoing maintenance is as important as understanding the proposed plumbing work itself.
Depending on the site and project, the work may relate to plumbing, drainage, gas, hot water, pumps, backflow, roof plumbing, trade waste, fire hydraulic services or shared plant. A plumbing business can consider the proposed location, surrounding services and the practical conditions that may shape the installation.
Shared infrastructure changes the conversation
At a multi-commercial property, a pipe, valve, pump, drain, meter, hot water unit, grease arrestor, backflow device or gas service may have implications beyond the tenancy where it is located. The service may be in a plant room, riser, ceiling space, meter room, roof area, loading dock, car park or another shared area.
Before work proceeds, it is useful to establish who owns or controls the affected service and whether installation activity could interrupt water, gas, drainage, hot water, trade waste, fire services or normal business operations. This early clarity helps the relevant people coordinate access and decisions.
Sites where multi-commercial work may arise
Multi-commercial work may be relevant in shopping centres, office buildings, mixed-use developments, commercial complexes, warehouses, medical centres, hospitality precincts, industrial units and multi-tenanted business parks. The important consideration is not the building label alone; it is whether the proposed work involves shared infrastructure, multiple occupancies or site-wide operating arrangements.
For a commercial plumbing fit out or commercial plumbing fitout, customers can help a plumbing business understand whether the installation is confined to one tenancy or connects to common services, plant or other occupied areas.
Information that helps a plumbing business assess the installation
Good site information allows a productive first discussion and helps identify the people, access arrangements and documentation that may need to be considered. Gather what is readily available rather than trying to diagnose the work yourself.
- site address, tenancy or unit number, and the best site contact;
- drawings, specifications or photos of the proposed location;
- the preferred product or fixture service, if one has already been chosen;
- plant room, riser, meter room or other asset location details;
- asset register details, equipment labels, make, model and serial numbers where available;
- previous service records and any available maintenance history;
- access dimensions, nearby existing services and isolation points;
- loading dock, parking, induction and access instructions;
- permitted working hours, tenant notification needs and project timing constraints; and
- the person authorised to approve additional work, if required.
Planning around access and business continuity
Multi commercial installation often involves access control, trading hours, shutdown restrictions and approval processes. Customers should identify whether the area is occupied, what access is available and whether the proposed work could affect another business or shared service.
Where installation is part of a broader project, drawings, specifications, program constraints and nearby services can provide important context. Construction-related installation also requires attention to sequencing and documentation before work is covered or handed over. Drawing revisions, access constraints, material lead times, quality hold points, testing, roof drainage coordination and incomplete as-built information can all influence the practical planning of a project.
Questions to raise before a commercial plumbing installation
- What is being installed? Describe the proposed fixture, service or system and share any available product details.
- Where will the work occur? Identify the tenancy, common area or service location, including any plant room, riser or roof access.
- What else could be affected? Consider connected water, gas, drainage, hot water, trade waste, fire services or operations.
- Who needs to be involved? Nominate the building manager, site contact and person authorised to approve work.
- What site conditions apply? Provide access instructions, inductions, parking or loading details, permitted work hours and any known project constraints.
For industrial plumbing installation, additional site information may be relevant, including permits, process impacts, isolation requirements, environmental controls, shutdown windows, confined-space risks, hot works requirements and critical production impacts.
Products and supply names customers may encounter
Product and supply conversations can involve many different names. Examples customers may encounter include Reece, Galvins, Galvin Engineering, Tradelink, Parkwood Plumbing Centre, Caroma, Rinnai, Rheem, Geberit and Kembla. These names are associated with brands, product systems and supply channels relevant to this area of plumbing.
A plumbing business can discuss how the selected product or system, site access and existing services relate to the proposed installation. The presence of a brand name does not by itself determine what is suitable for a particular site.
Choose a plumbing business with the right site conversation
Find a Master Plumber connects customers with Master Plumbers and plumbing businesses associated with the Master Plumbers and Gasfitters Association of Western Australia. It is backed by the Association, which has represented Western Australia’s plumbing and gasfitting industry since 1901.
Choosing a Master Plumber helps consumers make a more informed choice of plumbing business for their property or project. When comparing options for multi commercial installation, ask whether the plumbing business can consider the information you have gathered about the asset, location, access and operating constraints.
If the need is ongoing rather than installation-focused, Multi Commercial Repairs and Maintenance may be the more relevant next step. Other general plumbing work may also require a different service pathway where the setting is medical, strata, multi-residential, engineering or remote work.
Frequently asked questions
What does Multi Commercial Installation mean?
It refers to installation work in commercial settings with more than one tenancy, business or occupancy, particularly where services, access arrangements or operational impacts may be shared.
What information should I provide for a multi-commercial plumbing enquiry?
Provide the address, tenancy or unit number, site contact, access instructions and available drawings, photos, asset details, service records and timing requirements. It is also useful to identify the person authorised to approve extra work.
Why do shared services need to be identified?
A service located within one tenancy may affect other businesses or common areas. Identifying ownership, control and potential interruption before work starts supports clearer coordination.
Can access restrictions affect installation planning?
Yes. Site access, inductions, loading and parking arrangements, permitted working hours, tenant notification requirements and shutdown restrictions can all be relevant practical considerations.
Is a commercial plumbing fit out the same as Multi Commercial Installation?
A commercial plumbing fit out may be part of installation work at a commercial property. Multi Commercial Installation is particularly relevant where the work involves multiple occupancies, shared services or coordinated site arrangements.
How can Find a Master Plumber help?
Customers can use Find a Master Plumber to choose a plumbing business for their service needs.