If your length of drainage is below five meters it would be a case of using common sense to assess whether the leakage is acceptable or not. A good rule of thumb to go by is if there is damage to the place where you are undertaking the test then it is not a good sign and there is probably more water than there should be. On the whole it is common knowledge that an amount less than 25mm in ten minutes is not deemed enough to be a concern. How to Undertake a parasitic Current Drain Test? Necessary Conditions to perform Parasitic Drain Test

All about drain testing - Read our guide here at EasyMerchant All about drain testing - Read our guide here at EasyMerchant

During this shutdown wait period the fuse switch can be switched to IN and the multimeter can be removed to carry out other tasks. Remember to reconnect the multimeter before switching the fuse to OUT to prevent waking the car up when reconnecting. Diameter Pipe, 0.5l per 5-10m, 0.9l per 10-20m, 1.4l per 20-30m What happens with drains less than five meters long?

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Before attempting to fit the bungs for pressure testing ensure there are no issues or dirt that could prevent the installation and function of the bung, as any grit or dirt within the seal could allow leaking and thus fail a test.

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Next, the manometer must be monitored for five minutes and within this time it must not drop below 75mm. This will be considered a pass, however if it does reduce to below the 75mm line on the manometer there should be an examination for leaks and other signs of failure. If anything needs rectifying this must be complete before conducting another test and if this fails move to a water test. So, you have a problem with your drains and call an expert to out to test them. How exactly does the drain testing process work?Parasitic Current Drain is a vehicle diagnostic term that describes the situation when an on-board electrical device draws electric current from the vehicle’s battery when the vehicle ignition key is turned off. Drain testing bags are used in a variety of industries such as Sewerage, Petrochemicals, Food Processing, Mining etc. The reason for this is due to their adaptability and ideal use in places with a smaller area than the test diameter. The smaller sizes tend to be fitted with Schrader valves, or brass air traps and bigger ones are fitted with ball valves for inflating using a compressor. If necessary it can also be fitted with a pressure gauge to prevent over inflation. By filling a chamber to the top with water, no additional pressure should be imposed during this drop test. For this reason, the head of water should be minimal and, where practical, should be limited to 1.5 metres, measured from the lowest invert level of the drain being tested.

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Furthermore, before the drain test begins there will have to be a drain testing procedure building control officer there at the time. However it must be noted that it is best to ensure that the drainage has no immediate errors while flowing through the pipes, by running the system prior to having the officer observe the test. What is smoke testing?

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Mandrel testing is used to gauge the quality of an installation. It is a small object that is sent through the interior of the pipe to assess that the consistency of diameter throughout the pipe is adequate. They have a smaller diameter in comparison to the pipe itself, so for example if the pipe was 150mm you would look to use a 135mm mandrel. They can be identified as a cylinder like object. Once the vehicle has fully shut down the drain current reading can be gained from the multimeter. If the multimeter has been removed during the wait period, connect the multimeter to the WCDT then switch the fuse switch to OUT. Air Test – for single pipes or individual drain runs. The air pressure test is effective, but it can only be used to test a length of a drain that can be capped at both ends. A specific Parasitic Current Drain value is therefore expected to ensure the vehicle shuts down and prepares successfully. An issue only arises when the Parasitic Current Drain exceeds the manufacturers stated value (refer to vehicle technical data for specific test conditions and results.) If the excess current drain proceeds whilst the vehicle is standing inactive the battery becomes insufficiently charged and unable to perform an engine start. You may be wondering what happens with drains less than 5 metres long. In this case, it is a matter of judgement whether the leakage is significant. Generally, a drop of less than 25mm in 10 minutes is acceptable; however, if there is damage to the property as a result of the leak, there is a problem!