To maintain proper function of toilets, drains and pips by perform below 3 procedures frequently:
1) Pour water into drain outlets regularly to prevent foul air and insects in the sewage pipe from entering the premises.
2) Make sure drains and pipes do not leak or are not blocked. Do not alter them without prior authorisation.
3) Clean toilets daily with a dilutes household bleach solution (1 in 99). At home, make sure there is liguid soap and a clean towel in the toilets, liquid soap and disposable towels or hand dryers should be made available.