Areas of specialty
Water storage tanks for fire safety systems
Water storage tanks for fire safety systems
Water storage tanks for fire safety systems
We have a fully qualified commercial dive team to enter water storage tanks and complete any mandatory inspections, refurbishments, cleanings and leak detection's.
reservoirs
Water storage tanks for fire safety systems
Water storage tanks for fire safety systems
Potable water reservoirs are susceptible to contamination of varying degrees, which negatively impacts the environment and water quality. Our team of commercial divers are specialists in inspecting, cleaning, refurbishing and detecting leaks in reservoirs.
Water storage tanks for fire safety systems
Water storage tanks for fire safety systems
With licenced plumbers, a fire certifier and a fully qualified commercial dive team, we offer a full range of services for water storage tanks including:
1. Inspections;
2. Cleaning;
3. Maintenance (includes repairs, replacing faulty valves, replacing ladders and removing old / installing new liners);
4. Refurbishments; and
5. Leak detection.
While we use a range of methods (including ROVs and / or draining the tank), we believe the best way to perform these services is to use our dive team, who actually enter the tank to complete the mandatory inspections and carry out the cleaning and required maintenance.
ROVs can be useful for some inspections but are quite limited once any cleaning and / or maintenance is required. It is also difficult for an ROV to perform many of the tasks required in an inspection like accurately determining the depth of sediment, testing the tightness of nuts and bolts and / or feeling the liner to see if there is water caught behind it.
We therefore believe that using divers is paramount to inspect, clean and maintain tanks in accordance with the relevant legislation and standards. Using divers is also more cost effective and sustainable in that hundreds of thousands of litres of water are not waisted by draining the tank for each inspection and / or clean.
Inspections cover mandatory items such as water level, float valves, registered air-gaps, overflow sizing, flow testing, leakage, damage, corrosion, ladders, sediment, vents, signs, gaskets and seals and so on (Section 5.4, AS1851-2012). As discussed above, these things can be more thoroughly inspected using our dive team than with an ROV.
Maintenance / refurbishments are required when defects are discovered in the inspection process. For example, if an inspection reveals that an existing ladder has corroded, our divers can enter the tank to remove it and replace it with a new ladder.
Cleaning – top end equipment allows our divers to vacuum up any sediment while inside the tank. We also work with our clients to determine appropriate disposal of water removed from their tanks to meet their environmental management policies and EPA requirements.
Leak detection – our divers inject a food grade dye into problem areas in the tank to detect leaching. Once a leak is found, we use an appropriate solution, which may include applying food grade sealant to repair the leak, patching the liner or replacing the liner.
A member of our dive team performing a AS1851 10 yearly inspection & clean.
reservoirs
Potable water reservoirs
Our team also have extensive experience working in reservoirs.
Inspections are performed by our commercial dive team. We have ROV capabilities with high definition photo and video footage for reservoirs that require an inspection only. Alternatively, inspections are done during the cleaning of the reservoir – high definition photos and videos are provided to show the key elements of the inspection and to show the condition of the reservoir before and after the clean.
Cleaning is also done by our commercial dive team using state of the art diving and cleaning equipment. Reservoirs are thoroughly inspected and cleaned with minimal water loss. Our reservoir cleaning equipment is designated for use in potable water only and it is subject to a thorough sterilisation process prior to use on each job.
Leak detection – as with leak detection in tanks, our dive team injects a food grade dye into problem areas in the reservoir to detect leaching. Once a leak is found, the diver uses food grade sealants to repair the leak (where possible).
Maintenance / refurbishment in reservoirs can involve a range of tasks. For example, steel ladders, ladder cages and platforms can corrode and contaminate the water supply. FTA can remove and replace ladders with custom-built FRP ladders. State of the art underwater power tools are used for the removal and installation. Non-corrosive HDPE directional cones can be installed to direct the water flow from the inlet to circulate water and eliminate dead zones on the reservoir. Non-corrosive HDPE outlet covers can be fitted to ensure sediment is not taken up in the water supply and act as a protective barrier to divers working while the reservoir is online.
