 DEAS 1017 -3:2019  
ICS 91.140.70  
 
© EAC 2019                                                                                                                              First Edition 2019   
 EAST AFRICAN STANDARD  
Sanitary appliances (Vitreous china)  — Specification — Part 3: Wash 
basins  
EAST AFRICAN COMMUNITY  DEAS 1017 -3:2019  
ii © EAC 2019  – All rights reserved  
 Copyright notice  
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participants in the EAC st andards development process is permitted without prior permission from EAC, 
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© East African Community  2019  — All rights reserved  
East African Community   
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Tanzania  
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Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.  
Violators may be prosecuted . DEAS 1017 -3:2019  
© EAC 2019  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative refere nces  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 General requirements  ................................ ................................ ................................ ...........................  1 
5 Patterns a nd sizes  ................................ ................................ ................................ ................................ . 1 
6 Dimensions and tolerances  ................................ ................................ ................................ ..................  2 
6.1 Functional dimensions  ................................ ................................ ................................ .........................  2 
6.2 Connecting dimensions  ................................ ................................ ................................ ........................  3 
6.3 Tolerances  ................................ ................................ ................................ ................................ ..............  7 
7 Construction  ................................ ................................ ................................ ................................ ..........  7 
7.1 Soap holders  ................................ ................................ ................................ ................................ ..........  7 
7.2 Tap holes  ................................ ................................ ................................ ................................ ................  8 
7.3 Waste hole  ................................ ................................ ................................ ................................ ..............  8 
7.4 Fixing arrangements  ................................ ................................ ................................ .............................  8 
7.4.1  Bracket stud  ................................ ................................ ................................ ................................ ...........  8 
7.4.2  Screw fixing  ................................ ................................ ................................ ................................ ...........  8 
7.4.5  Rag bolt  ................................ ................................ ................................ ................................ ..................  8 
7.5 Overflow  ................................ ................................ ................................ ................................ .................  8 
7.6 Soap recess(es)  ................................ ................................ ................................ ................................ ..... 8 
7.7 Load bearing test  ................................ ................................ ................................ ................................ ... 8 
7.8 Chain stay hole  ................................ ................................ ................................ ................................ ...... 9 
7.9 Pedestal  ................................ ................................ ................................ ................................ ..................  9 
8 Finish  ................................ ................................ ................................ ................................ ......................  9 
9 Sampling, inspection and methods of test  ................................ ................................ .........................  9 
9.1 Sampling and inspection  ................................ ................................ ................................ ......................  9 
9.2 Methods of test  ................................ ................................ ................................ ................................ ...... 9 
10 Marking  ................................ ................................ ................................ ................................ .................  10 
Bibliography  ................................ ................................ ................................ ................................ ......................  11 
 DEAS 1017 -3:2019  
iv © EAC 2019  – All rights reserved  
 Foreword  
Development of the East African Standards has been necessitated by the need f or harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and services are exchanged 
within the Community wi ll be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the National 
Standards Bodies in Partner States, together w ith the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders including government, academia, consumer groups, priva te sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are discussed and incorporated before finalization of standards, in 
accor dance with the Principles and procedures for development of East African Standards. XXXXXX.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are therefore expected to ensure that th ey always have the latest versions of the standards 
they are implementing .  
The committee responsible  for this document is Technical Committee EASC /TC 037, Utensils, cutlery, 
Sanitary wares and fittings and domestic hardware . 
Attention is drawn to the poss ibility that some of the elements of this document may be subject of patent 
rights. EAC shall not be held responsible for identifying any or all such patent rights.  
 DRAFT EAST AFRICAN STANDARD  DEAS 1017 -3:2019  
 
© EAC 2019  – All rights reserved  1 
 Sanitary appliances  (vitreous china)  — Specifications  — Part 3: Wash 
basins  
1 Scope   
This Draft East African standard covers the requirements, patterns and sizes, dimensions and tolerances, 
construction, finish, sampling and marking provisions for vitreous washbasins . 
2 Normative references   
The following documents are referred to in the text in such a way that some or all of their content constitutes 
requirements of this document.  For dated references, only the edition cited applies. For undated references, 
the latest edition of the referenced document (including any amendments) applies.  
DEAS 1017 -1:2019 , Vitreous sanitary appliances — Part 1: General requirements  
DEAS 1017 -2:2019 , Sanitary appliances  (Vitreous china) — Specifications  — Part 2: Wash down water 
closets  
3 Terms and definitions   
For the purposes of this document, the terms and def initions given in DEAS 1017 -1:2019 . 
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
4 General re quirements  
The general requirements relating to terminology, materials, manufacture, glazing, defects, minimum 
thickness, tolerances, performance and methods of tests shall conform to DEAS 1017 -1:2019 . 
5 Patterns and sizes  
5.1 The patterns and sizes of washbasins  shall conform to Table 1.  
Table 1 — Patterns and corresponding sizes of wash basins  
Pattern  Size 
mm 
Flat back  660 x 460 (Surgeon’s basin)  
630 x 450  
550 x 400  
450x 300  
Angle back  600 x 480  
400 x 400  DEAS 1017 -3:2019  
2 © EAC 2019  – All rights reserved  
 5.2 Wash basins  may be made in other patterns and sizes where so agreed to between the manufacturer 
and the purchaser. However, except for functional dimensions all other requirements as laid down in this 
standard shall be complied with.  
6 Dimensions and tolerances  
6.1 Functional dimensions  
The functional dimensions of washbasins  shall conform to those given in Table 2 read with figures 1A and 1B. 
1B. 
Table 2 — Functional dimensions o f washbasins  
Pattern  Size 
mm Length , 
A 
mm Breadth , 
B 
mm Height , 
C 
mm 
Flat back  660 x 460 
(Surgeon’s basin)  660 460 200, m in 
630 x 450  630 450 290, max 
550 x 400  550 400 290, m ax 
450x 300  450 300 225, max  
Angle back  600 x 480  600 480 290, m ax 
400 x 400  400 400 290, m ax 
 
 
Figure 1 — Functional dimensions of washbasin  — Typical sketches  DEAS 1017 -3:2019  
© EAC 2019  – All rights reserved  3 
 6.2 Connecting d imensions  
6.2.1  The connecting dimensions are critical for plumbing applications and these shall be strictly complied 
with irrespective of the pattern and design.  
6.2.2  Connecting dimensio ns for washbasins  with five, three and two tap hole set shall conform to Table 3 
read with Figures 2 and 3.  
Table 3 — Connecting d imensions for washbasin  with five, three and two tap hole set  
Description  Reference in figures 
2&3 Dimensions  
mm 
Diameter of outer tap holes  d1 
2
030+
− 
Diameter of central tap hole  d2 
2
135+
− 
Distance from vertical planes 
passing through the centre line of 
the central tap hole and the centre 
line of the outer (adjacent) t ap 
holes  e ≤15 
Distance between the centre lines 
of the two outer (distant) tap holes  
a) For size 630x450  
b) For size 550x400  f1 
For size 630x450  480 
f1 
For size 550x400  400 
Distance between the centre lines 
of the two adjacent outer tap holes  f2 200±4 
Horizontal dist ance between 
centre line of the central tap hole 
and the edge of the bowl  g1 80, max.  
Horizontal distance between 
centre line of a distant hole and 
the edge of the bowl  g2, g3 65, max  
a) Distance from wall or inside of 
skirting (where provided) and 
centre l ine of central tap hole  
b) Distance from wall (where 
skirting is not provided) and 
centre of tap hole  g4 32, min.  
g4 40, min  
Radius of a cylinder with the same 
axis as the fitting hole which 
permits the following free space 
below the inside edge of the tap  
fitting hole  
a) Of 0 to 5  mm height  
b) Of 5 mm and more height  r 25, min.  
r1 30, min.  
Wall thickness in the zone of the 
tap fitting hole  s 18, max.  
Horizontal distance between the 
axis of the central tap hole to the 
axis of the waste outlet opening  t 170, m ax. 
1) Dimension’t’  is not applicable for angle backwash  basin and 450 mm x 
300 mm wash basin.  
2) Dimension f 2 is not applicable for 450 mm  x 300 mm washbasin . 
 DEAS 1017 -3:2019  
4 © EAC 2019  – All rights reserved  
 
 
Figure 2 — Details of tap fitting hole (As measured after the holes punc hed)  
 
Figure 3 — Connecting dimensions of washbasins  with five, three and two tap holes  
6.2.3  Connecting dimensions for washbasins  with single tap hole shall conform to Table 4 read with Figures 
2 and 4  DEAS 1017 -3:2019  
© EAC 2019  – All rights reserved  5 
 Table 4 — Connecting dimensions for wash basins with centre tap hole  
Description  Reference in figures 
2&4 Dimensions , 
mm 
Diameter of tap hole  d2 
2
135+
− 
Horizontal distance between 
centre line of tap hole and edge of 
bowl g1 80, max.  
Distan ce from wall or inside of 
skirting (where provided)and 
centre line of tap hole  g4 32, min.  
Distance from wall (where skirting 
is not provided) and centre of tap 
hole g4 40, min.  
Radius of a cylinder with the same 
axis as the fitting hole which 
permits th e following free space 
below the inside edge of the tap 
fitting hole:  
Of 0 to 5 mm height  
Of 5 mm and more height  r 25, min.  
r1 30, min.  
Wall thickness in the zone of the 
tap fitting hole  s 18, max.  
Horizontal distance between the 
axis of the tap hole  to the axis of 
waste outlet opening  t 170, max.  
Note  Dimension 't' is not applicable for angle back wash basin and 450 mm 
x 300 mm wash basin  
 
 
Figure 4 — Connecting dimensions for  single tap hole  wash basins  
6.2.4  Dimensions  of waste outlet hole shall conform to those given in Table 5 read with Fig ure 5 . DEAS 1017 -3:2019  
6 © EAC 2019  – All rights reserved  
 
 
Figure 5 — Dimensions of waste outlet hole  DEAS 1017 -3:2019  
© EAC 2019  – All rights reserved  7 
 Table 5 — Dimensions of waste outlet hole  
Description  Reference in Figure  
5 Dimen sions  
mm 
Diameter of waste outlet opening  d3 
2
346+
− 
Maximum diameter at the bevelled 
portion of the waste outlet opening  d5 75, max.  
Outside diameter of the seating 
face of the waste outlet opening  d6 60, min.  
Depth of outlet for wash basin with 
integral overflow  h 45 — 50. 
Vertical distance between the  tap 
platform and  the lower plane of the 
waste outlet hole  p 250, max  
6.2.5  Fixing (mounting)  dimensions for wall-hung  basin shall conform to Table 6, read with Fig ure 6. 
 
Figure 6 — Fixing dimensions for wall hung wash basins  
Table 6 — Fixing dimensions for wall hung washbasins  
Description  Reference in figure 
6 Size of wash 
basin  
mm Dimensions  
mm 
Horizontal distance between the axis of  two fixing 
holes  n Up to and 
including 550x400  
Above 550x400  240±10 
280±10 
Vertical distance between the centre lines of the 
fixing holes and the tap platform  p2 All sizes of flat 
back wash basins 
(except 450x300) 
and angle back 
wash basin  40—72 
6.3 Tolerances  
Where tolerances are not given for specific dimensions, these shall be in accordance with CD/UG/01:2019. 
7 Construction  
7.1 Soap holders  
The wash basin shall be of one -piece construction with/without a combined overflow and soap holder(s). All 
internal angles shall be such as to facilitate easy cleaning.   Enlarged hole  DEAS 1017 -3:2019  
8 © EAC 2019  – All rights reserved  
 Wash basin for use in surgeon's room and operation theatre shall not be provided with soap holder recess 
and combined overflow.  
7.2 Tap holes  
Wash basins shall be provided with five, three, two or s ingle tap hole, round in shape and symmetrical about 
the centre line of the basin and either fully punched or semi -punched. The tap holes shall be suitable for fixing 
pillar taps. The level of the top of the platform which accommodates the taps shall not b e below the spill over 
level of the basin irrespective of the overflow arrangement. For angle back basin, provision shall be made for 
one or two tap holes in any suitable position in accordance with the design of the manufacturer . 
7.3 Waste hole  
Each basin  shall have a circular waste hole of dimension as per the details given in 6.2.4. The waste hole 
shall accommodate a waste fitting having a flange diameter of 64 mm.  
7.4 Fixing arrangements  
7.4.1  Bracket stud 
Any provision to receive the brackets on the un derside of the wash basin shall be capable for receiving a 
bracket stud not exceeding 13 mm in diameter,  8 mm high and 305 mm from the back of the basin to the 
centre of the stud. Horizontal distance between two stud provisions shall be A -50 mm, where A is  length in 
mm of wash basin.  
7.4.2  Screw fixing  
For flat back wash basins of size up to 450 mm x 300 mm and for angle back wash basins of size up to 400 
mm x 400 mm, screw -fixing holes (minimum two) shall be provided at a suitable distance and location. Th e 
screwing hole diameter shall be 6.5 mm minimum.  
7.4.5  Rag bolt  
Additional/alternate provision for fixing the wash basin on rag bolts may be provided at the back of the basin 
and shall not be visible from outside when installed in its normal position. The  rag bolt holes shall be of 
dimensions given in Table 6, suitable for a minimum M8 size bolt.  
7.5 Overflow  
An overflow slot  shall have a horizontal dimension not larger than 64 mm and an area not less than 500 mm2. 
A round overflow of the same area can be an alternate design.  
7.6 Soap recess(es)  
The soap recess(es) shall have adequate provision for draining into the bowl.  
7.7 Load bearing test  
The wall hung wash basins of 500 mm and above length shall be installed on rag bolts or brackets. A load of 
5
0110+
−
 kg or a force of 
0.05
01.1+
−  kN shall be applied for a period of 1 h by placing it on a wooden beam with a 
cross -section of 100 mm x 100 mm positioned across the centre of the opening of the top surface of the wash 
basin. No da mage or defect shall occur to the wash basin and the fastenings.  DEAS 1017 -3:2019  
© EAC 2019  – All rights reserved  9 
 7.8 Chain stay hole  
The chain stay hole, where provided shall be 10mm diameter and shall be completely above the level of the 
top of the overflow hole/slot.  
7.9 Pedestal  
The quality and thick ness of the ware and the quality of the glaze of the pedestals shall not be less than that 
of the basins with which it is to be installed. They shall be recessed at the back for the reception of supply and 
waste pipe and fittings. They shall be so construc ted as to support the basins rigidly and adequately and shall 
be so designed as to make the height from the floor to top of the rim of basin between 750 mm to 850 mm. 
(see figure 7)  
 
Figure 7 — Pedestal for wash basin  
8 Finish  
Inside surface of washbasins  shall be glazed uniform and smooth in order to ensure efficient draining.  
9 Sampling, inspection and methods of test  
9.1 Sampling and inspection  
The recommended method of sampling, process inspection and lot inspection of washbasi ns shall be given in 
DEAS 1017 -2:2019 . 
9.2 Methods of test  
9.2.1  Applicable tests as given in DEAS 1017 -1:2019  except shall be conducted.  DEAS 1017 -3:2019  
10 © EAC 2019  – All rights reserved  
 9.2.2 Overflow tes t. The wash basins shall be installed in a stand with a pop up waste fitting. The rate of 
water supp ly shall be adjusted to 9.5 l/min. The waste outlet shall be closed. The elapsed time from the onset 
of water flowing into the overflow opening until the water begins to overflow the flood level shall be measured. 
The wash basin  shall drain for 5 min witho ut overflowing.  
10 Marking  
Wash basins shall be legibly and indelibly marked at a suitable place with the following:  
a) name or trade -mark of the manufacturer, and  
b) batch/lot number or date of manufacture  DEAS 1017 -3:2019  
© EAC 2019  – All rights reserved  11 
 Bibliography  
IS 2556 -4:2004, Vitreous sanitary applianc es (vitreous china) — Specification — Part 4 specific requirements 
of wash basins  
 DEAS 1017 -3:2019    
 
© EAC 2019 – All rights reserved  
  
  