5-Year Fire Hydrant Overhaul: Planning, Access Requirements, and Common Pitfalls

If you're managing a commercial building, industrial facility, or residential complex, you've likely heard about the "5-year fire hydrant overhaul". It's more than just another line item on your maintenance calendar—it's one of the most intensive, technical, and often misunderstood components of AS1851 fire compliance.

At Apex Pumps, we've worked with clients across sectors who assumed the overhaul was simply "another test." But in truth, it involves full strip-downs, system isolation, and more access than most facilities expect. Planning poorly—or not at all—can lead to delays, cost overruns, or failed compliance.

This blog lays out what the 5-year overhaul actually involves, what access you'll need, and the most common pitfalls we've seen.

What Is a 5-Year Hydrant Overhaul?

Under AS1851:2012, your fire hydrant system is required to undergo a comprehensive overhaul every five years. Unlike annual inspections or functional flow tests, this is a deep dive into the physical condition of your system. It involves dismantling, inspecting, overhauling or replacing all landing valves on site as well as Hydrostatic testing and booster flow testing—these are much more thorough tests than routine maintenance.

Here's what it typically includes:

• Booster Assemblies

These are the connection points used by the fire brigade to supply additional water pressure to the system. The overhaul requires us to overhaul the valve with new washers and rubbers or replace the booster point entirely.

• Hydrant Landing Valves

Located on each floor, these are the valves firefighters connect to during an incident. They are either replaced or overhauled which involves disassembly, lubrication, gasket and rubber replacements, resealing, and then tested for smooth operation, leaks, and full pressure delivery. Learn more about our fire hydrant repair services.

• Isolation Valves and Stop Valves

These valves are there to allow different zones to be isolated. Where applicable we replace the gland packing and lubricate spindles. We will exercise and operate the valves. They are tested for ease of operation, leaks at the spindle or body, and their ability to fully open or close without obstruction.

• Non-Return Valves

Non return valves prevent backflow of water, ensuring that pressure doesn't move in the wrong direction. These are inspected and overhauled, replacing the valve seatings and gaskets or replacing the unit entirely if they are unable to be overhauled.

• Pumps and Pump Controls (if applicable)

In systems with dedicated fire pumps, the fire pump will also require a five yearly overhaul which can be discussed at the same time. Learn more about our fire pump testing services.

The purpose of this overhaul is straightforward but critical: to ensure your hydrant system will function properly in a high-pressure emergency scenario, without hidden faults. It identifies:

• Internal corrosion
• Seized or degraded components
• Faulty seals or gaskets
• Mechanical fatigue

The process is not optional. It's a mandatory part of AS1851 compliance, and all findings and works must be formally documented in your building's fire maintenance records.

Key Planning Steps Before the Overhaul Begins

To avoid disruption and ensure smooth execution, here are the steps we help clients plan for in advance:

1. System Mapping and Component Identification

Before anything is shut down or dismantled, your contractor needs an accurate picture of:

• Where every valve, booster, and hydrant point is located
• Whether any system components were relocated or modified over the life of the system
• Accurate number of landing valves on site and access to all areas they are located in

2. Stakeholder Coordination

Overhauls require complete system isolation and downtime. That affects:

• Building occupants
• Facility managers
• Fire wardens

Give advance notice. For hospitals, schools, or high-risk industrial facilities, this may involve scheduling work during nights, weekends, or holiday periods. Our maintenance services team can help coordinate these complex scheduling requirements.

3. Permit and Isolation Planning

You may need:

• Fire isolation permits to be submitted to your insurance
• To notify your residents and possibly the local fire brigade
• Isolation sequences that maintain compliance without exposing the building to fire risk

Coordination with fire services or backup suppression systems may be necessary if the hydrant system is the primary response tool.

Access Requirements That Are Often Overlooked

Even seasoned building managers are surprised by the level of physical access required for a full 5-year hydrant overhaul. Here's what's commonly missed:

Common Pitfalls (and How to Avoid Them)

These are the top mistakes we see on overhaul projects—and how you can steer clear of them:

1. Assuming "5-year test" means the same as the annual checks

This is the biggest misconception. The 5-year overhaul is a strip-down and rebuild, not just a function test. Treating it lightly leads to missed prep, rushed jobs, and non-compliant documentation.

2. Failing to discuss system isolations and permits required

Without correct isolation sequencing, you risk:

• Insurance issues
• The works not being able to be carried out

3. Skipping detailed reporting

AS1851 requires that you document every component overhauled or replaced. If this is missed, your system may still be non-compliant, even if the work was technically done.

4. Not budgeting for the works

Overhauls are costly, these need to be budgeted for before it is due:

• If you know your system is due for an overhaul this year or next year, start to get pricing so you can budget

Apex Pumps: Your Overhaul Partner, Not Just a Tester

At Apex Pumps, we treat the 5-year overhaul as an engineering-grade process, not a basic service call. We:

• Provide you with a detailed scope and plan of the works
• Assist with stakeholder briefing and scheduling
• Coordinate with plumbers and fire technicians
• Keep downtime to a minimum

Whether you manage a multi-storey building or a large-scale industrial facility, our team ensures you meet the spirit and letter of compliance—with no loose ends. We serve clients across Sydney, Central Coast, Wollongong, Newcastle, and the Hunter Valley.

Final Word: Don't Wait for the Deadline

The 5-year fire hydrant overhaul is not a routine test. It's a critical safety requirement that protects lives, property, and your liability. With the right planning, access preparation, and partners in place, you can complete it with confidence—and without disruption.