Decontamination in primary care dental practices - Gov.uk

19 Hot and cold water systems and dental unit water linesa. A power failure:– This may result in a failure to maintaintemperature in the hot water system.– If the dental practice produces its owndistilled water, this will restrict the amountof distilled water that can be produced in aset time period.b. A mains-water failure that could last beyondthe period for which storage capacity has beendesigned. This:– may result in the temporary cessation of theproduction of RO water;– may require the temporary cessation ofsterile supply activities;– may result in hygiene issues for patient andstaff WCs/washrooms.The emergency action to be taken during anoutbreak of healthcare-associated legionellosisis covered in Health Technical Memorandum04-01 Part B Appendix 1.Documentation19.21 It is essential to have comprehensive operationalmanuals for all items of plant; they should includerequirements for servicing, maintenance tasks andfrequencies of inspection.19.22 This information should be kept together with allcommissioning data.As-fitted drawings19.23 The availability of accurate as-fitted drawings isessential for the safe operation of hot and coldwater service systems. The drawings are necessaryto perform the temperature control checks on thesystems and will assist in identifying any potentialproblems with poor hot water circulation and coldwater dead-legs where flow to sporadically-usedoutlets can be low. Such information shouldidentify all key components in the installations,for example water meters, storage tanks (filtrationequipment, where fitted), calorifiers and thelocation of isolating valves in the systems. As-fitteddrawings can be obtained from third parties suchas architects.19.24 In addition to drawings, there should becomprehensive schedules of outlets, lists of sentinelNotetaps (outlets), other outlets to be tested annuallyand other components in the system.The information required above could be compiledby the Competent Person employed to produce thewritten scheme, since much of the information is anintegral part of the written scheme itself.Record-keeping19.25 The User should ensure that an accurate recordof all assets relating to the hot and cold waterdistribution systems is set up and regularlymaintained.19.26 The User should also ensure that records of allmaintenance, inspection and testing activities arekept up-to-date and properly stored. Recordsshould be kept for at least five years. As aminimum, the following items should be recorded:• the names and positions of those responsiblefor performing the various tasks under thewritten scheme;• a Legionella risk assessment and a writtenscheme of actions and control measures;• details of precautionary measures that havebeen carried out, including sufficient detail toidentify that the work was completed correctlyand when the work was carried out.19.27 Planned preventive maintenance will help toensure that systems perform correctly, and anessential element of this process is the maintenanceof accurate records.19.28 Maintenance records should include the following:• details of remedial work required and workcarried out;• details of cleaning and disinfection procedures;• results of any chemical or microbiologicalanalyses of water.19.29 When alterations to equipment or systems areimplemented, any drawings kept with the recordsshould be updated to reflect the modificationscarried out.19.30 The asset register should be designed to providethe following information:• an inventory of equipment;• a basis for identifying equipment details;69