Question 20: Element 3f – Measures to improve water efficiency and alleviating water poverty must be installed when replacing fittings and fixed appliances.
Cwestiwn 20: Elfen 3f – Rhaid gosod mesurau i wella effeithlonrwydd dŵr a lleihau tlodi dŵr wrth adnewyddu ffitiadau a chyfarpar gosod.