Legionella Management - Hot & Cold Water Services
Hot Water Service
The following notes are a guide to good practice with regards to a hot water service system.
- Tight fitting cistern cover to protect from dirt ingress
- Dead legs to be kept to a minimum.
- Thermostat setting to be correct and checked regularly against actual storage temperature.
- Records to kept.
- Regular cleaning, descaling and desludging of calorifiers should be carried out.
There are many other forms of good practice which ABC can provide and ensure that your system is minimised of Legionella risks.
The following tables show the recommended monitoring (M), Inspection (I) and Servicing (S) frequencies for hot and cold water services which can all be provided and managed by ABC.
| System /Service | Task | Frequency | |
|---|---|---|---|
| Hot Water Service | Arrange for samples to be taken from hot water calorifiers, in order to note condition of drain water | Annually | M |
| Check flow and return water temperatures at calorifiers, plus temperature of drain water | Monthly | M | |
| Check water temperature after 1 minute at sentinel outlets - must reach 50 deg c within 1 minute. | Monthly | M | |
| Visual checks of internal surfaces of calorifiers for scale and sludge. | Annually | I | |
| Cold Water Service | Check tank water temperature remote from ball valve and mains temperature at ball valve. | Summer & Winter | M |
| Check that water temperature is below 20 deg at the sentinel taps after running the tap for 2 minutes | Monthly | M | |
| Visually inspect the cold water storage cisterns. | Annually | I | |
| Shower Heads | Dismantle, clean and descale shower heads and hoses. | Quarterly | S |
| Little-Used Outlets | Flush little used outlets | Weekly | S |
 |
 |
 |
 |
 |
|---|
