Are there any regs for max temperature on Disabled thermostatically controlled taps, most commercial taps have to be above 50 deg for legionella does that apply to disabled tapa if you follow my drift ?
dunno for sure, if your fitting some, the instruction might help.
legionella would struggle to grow. the hot water should be at about 60c/65c from the cylinder/combi and mix down at the point of use to around 50c, which is considered to be safe.
plus, as i'm sure you know, you have to breath in the bug to get it.
Specifications
Factory temperature setting: 43°C
Temperature setting range: 38-46°C
Temperature, hot supply: 52-65°C
Temperature, cold supply: 5-20°C
Minimum hot to mix differential
temperature: 10°C
Temperature stability: ± 2°C
The following might be of some use - it's a combination of IPHE and NHS estates recomendations regarding water temperature
There are two distinct issues that need to be considered in relation to water temperature;
A) Stored/static water temperature
Stored/static water – must be at a temperature that either removes the risk of legionella or prevents the (naturally occurring) bacteria from multiplying.
The effect of water temperatures on legionella bacteria
70°C to 80°C Disinfecting range
66°C Bacteria die within 2 minutes
60°C Bacteria die within 3 minutes
55°C Bacteria die within 5 to 6 hours
20°C to 45°C Bacteria multiply
20°C & below Bacteria are dormant
B) Outlet water temperature
Water should be delivered to the point of use at a temperature that reduces the possibility of scalding.
The effect of water temperatures on human skin
65°C a partial thickness burn in approx. 2 seconds
60°C a partial thickness burn in approx. 5 seconds
55°C a partial thickness burn in approx. 15 seconds
50°C a partial thickness burn in approx. 90 seconds
The Education (School Premises) Regulations 1981 – regulation 26 specifies that “washbasins shall be provided with warm water at a temperature not exceeding 43.5°C”
The IPHE (Institute of Plumbing & Heating Engineers) makes the following recommendations;
Water must be stored at a temperature high enough to eliminate legionella bacteria or prevent them multiplying and must be delivered at a temperature cool enough to prevent scalding.
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