1      
No. S 000  
PUBLIC UTILITIES ACT  
(CHAPTER 261)  
PUBLIC UTILITIES (WA TER SUPPLY)  
(AMENDMENT) REGULATI ONS 2019  
In exercise of t he powers conferred by section 72  of the Public 
Utilities Act , the Public Utilities Board, with the approval of the 
Minister for the Environment and Water Resources, makes the 
following Regulations : 
Citation and commencement  
1.  These  Regulations  are the Public Utilities (Water Supply) 
(Amendment) Regulations 2019  and come into operation on  1 April 
2019 . 
Amendment of First Schedule  
2.  Paragraph 18 of the  First Schedule to the Public Utilities (Water 
Supply) Regulations (Rg 5) (called in these Regulations the 
principal Regulations) is deleted and the followi ng paragraph 
substituted therefor : 
“18.—(1)  Every flushing cistern serving a water -closet pan must be of 
such a design, and be arranged , so as t o give a dual flush of 2 different 
volumes such that — 
 (a) the volume of the full flush does not exceed 4 litres; and  
 (b) the volume of the reduced flush does not exceed 3 litres.  
(2)  Every flush valve serving a water -closet pan must be of such a 
design, and be arranged , so as to give a single flush of not more than 4.5 
litres.  
(3)  Every flush valve serving a urinal must be of such a design, and be 
arranged , so as to give a single flush of not m ore than 1 litre.”.    2     
Amendment of Part 2 of Second Schedule  
3.  Paragraph 2 of P art 2 of the Second Schedule  to the principal 
Regulations is amended by deleting sub -paragraphs ( a) to ( e) and 
substituting the following sub -paragraphs:  
 “(a) basin tap and mixer — 
Number of ticks  Flow rate  (litres per minute)  
2 2 < flow rate ≤  4  
3 flow rate ≤  2  
 (b) sink tap and mixer or bib tap and mixer — 
Number of ticks  Flow rate (litres per minute)  
2 4 < flow rate ≤  6 
3 flow rate ≤  4 
 (c) shower tap and mixer — 
Number of ticks  Flow rate  (litres per minute)  
2 5 < flow rate ≤  7 
3 flow rate ≤  5 
 (d) flushing cisterns — 
Number of ticks  Flush volume (litres per flush)  
2 (a)  3.5 <  flush volume for full flush 
≤  4; and  
(b)  2.5 <  flush volume for reduced 
flush ≤  3 
3 (a)  flush volume for full flush ≤   3.5; 
and 
(b)  flush volume for reduced flush 
≤  2.5 
 (e) urinal flush valves and waterless urinals — 
Number of ticks  Flush volume (litres per flush)  
2 0.5 <  flush volume ≤  1 
3 flush volume ≤  0.5”.  3      
Amendment of Part 3 of Second Schedule  
4.  Part 3 of the Second Schedule to the principal Regulations is 
amended — 
 (a) by deleting sub-paragraph ( c) of paragraph 1 and 
substituting the following sub -paragraph:  
 “(c) the lowest flow rate of the tap and mixer — 
 (i) for a basin tap and mixer with a flow rate falling 
within the range of flow rates specified for 2 ticks 
and 3 ticks — must not be lower than 1.5 litres per 
minute;  
 (ii) for a sink tap and mixer with a flow rate falling  
within the range of flow rates specified for 3 ticks 
— must not be lower than 2.5 litres per minute;  
 (iii) for a sink tap and mixer with a flow rate falling 
within the range of flow rates specified for 2 ticks 
— must not be lower than 3.5 litres per minute;  
 (iv) for a bib tap and mixer with a flow rate falling 
within the range of flow ra tes specified for 2 ticks 
and 3  ticks  — must not be lower than 3.5 litres per 
minute ; and  
 (v) for a shower tap and mixer with a flow rate falling 
within the range of flow rates specified for 2 ticks 
and 3 ticks — must not be lower than 4.5 litres per 
minute ;”; 
 (b) by deleting the words “6 litres” in paragraph 1( d)(i) and 
substituting the words “4 litres”;  
 (c) by deleting the words “8 litres” in paragraph 1( d)(ii) and 
substituting the words “6 litres”;  
 (d) by deleting the words “9 litres” in paragraph 1( d)(iii) and 
substi tuting the words “7 litres”;  
 (e) by inserting, immediately after the words “flush valve”  in 
paragraph 2 , the words “serving a urinal”; and  
    4     
 (f) by deleting the words “,  (2) or (5)” in paragraph 2 a nd 
substituting the words “or (3 )”. 
[G.N. Nos. S 97/ 2005; S 703/2008; S 832/2010; 
S 161/2011; S 616/2 013; S 721/2014; S 826/2014; 
S 55/2015; S 133/2017; S 336/2017 ; S 164/2018; 
S xxx/2018 ] 
Made  on                             2018. 
CHIANG CHIE FOO  
Chairman,  
Public Utilities Board,  
Singapore.  
[MEWR S030/01/124; AG/LEGIS/SL/261/2015/3 Vol. 1]  
(To be presented to Parliament under section 72(4) of the Public 
Utilities Act).  
Note 1: EY/PU (WS) (Amd) Regs 2019 (v0 8) (25.05.18)