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Inspection Services


ROV Inspection

Technical Bulletin 203: September 2022:1

TB203.3.5 two-yearly routine; states that sprinkler water storage tanks are to be inspected by a specialist company. As a specialist contractor, Liquitech were involved in writing these standards with the FPA and RISCAuthority.

An ROV (Remotely Operated Vehicle) is the most effective way to internally inspect a tank. Key benefits include:

  • Elimination of confined space working.

  • Elimination of risks such as structural failure or liner failure associated with draining or refilling the tank. 

  • The sprinkler system can remain live at all times.

  • Minimal environmental impact, so no water is wasted.

  • Management input is minimal.

  • It's quicker, safer and far more cost effective than entering a tank to inspect it.

Along with collecting internal footage of the tank, we also collect details of all external components including the tank shell and connections. In accordance with TB203 we also carry out ultrasonic thickness testing on the tank panels to an accuracy of +/- 0.01mm.


Following the ROV inspection, a detailed report highlighting the condition of the tank, connections, and ancillary items, with photographs to illustrate all aspects will be submitted. An itemised list of recommended tank remedial works will be detailed in the report. 

Click here to view a sample ROV Report


Internal Inspections with tank entry

We understand that some tanks will need to be drained and entered in order to carry out a tank inspection. All Liquitech engineers are trained and certified in confined space working enabling us to complete inspections where tank entry is required. 

Following a tank entry inspection a condition report to the same standards as the ROV tank inspection will be submitted. 


Ultrasonic Pipework Testing

Ultrasound is an invaluable technology, enabling us to build up a very accurate picture of the overall health of your pipework in-situ. We can identify areas of corrosion and weakness in the pipe wall without disrupting service or supply.

NDT inspection eliminates the need to cut out sections of pipe for off-site analysis. Because the pipework remains live throughout the inspection, there is no loss of service/sprinkler cover. This minimises disruption, inconvenience and cost to our customers.

By eliminating the off-site analysis, we also reduce the project timescales, enabling customers to have detailed information about the condition of their pipework quickly.

Our equipment allows us to measure material thicknesses of 0.080mm through to 635.00mm with an accuracy of +/- 0.01mm.

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