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Project Planning

There is no Australian Standard that governs the performance of floor gullies. ACO believes that EN 1253, specifically written to regulate these types of products, is the most appropriate International Standard.

EN 1253 – Gullies for buildings 1. Scope
‘This Standard classifies gullies, gives guidance for places of installation and specifies requirements for construction,design, performance and marking of factory gullies, irrespective of material,for use in drainage systems operating under gravity including siphonic systems.’

The table below is created to give designers,installers and users assistance in selecting the correct product.The table is based on loadings outlined in EN 1253 and is cross referenced with AS 3996 – Access Covers and Grates,the most relevant Australian Standard for load classifications. ACO has gained NATA accreditation (No.15193) for its testing laboratory and can provide test reports to EN 1253.

Standards only give an objective means for comparing products. There are a number of key factors affecting a product’s resistance to load and additional consideration must be given to:

  • Type of traffic: Consider the weight of loads being carried, for example forklifts, trolleys and trucks.
  • Wheel type: Solid tyres exert more stress through smaller contact areas than pneumatic tyres, so a heavier duty grate may be required. Note, laden trolleys can intensify the load.
  • Frequency and speed of traffic: More frequent and faster traffic can intensify the load.
  • Position of gully: If the product is positioned where traffic will be turning or braking, or if it is installed at the bottom of a ramp, the gully will be subjected to extreme forces.

1 Draft prEN 1253

Note: For higher load classes contact ACO.

Load Classes

Water flow is restricted by the open area of grate. For the ACO Wexel range, there is no further reduction of flow from the underlying bodies. The head of water creates pressure and is also part of the calculation.

The table below shows the flow rate based on the diagram shown right.

Note that fixed or removable strainers will reduce the flow rates.

Hydraulic Data

Floor Drains - Push-fit
  Part No. Intake area
(mm2)
Based on 20mm
head of water (H)
Based on 30mm
head of water (H)
Based on 40mm
head of water (H)
Based on 50mm
head of water (H)
round grate 141855
141856
141857
141958
141858
2,404
5,503
4,173
N/A
6,901
0.98
2.24
1.70
N/A
2.81
1.20
2.74
2.08
N/A
3.44
1.38
3.17
2.40
N/A
3.97
1.55
3.54
2.69
N/A
4.44
square grate 141859
141860
141861
2,919
7,216
13,734
1.19
2.94
5.59
1.46
3.60
6.85
1.68
4.16
7.91
1.88
4.65
8.84
compact bucket trap 141969
141970
141971
5,503
7,216
13,734
2.24
2.94
5.59
2.74
3.60
6.85
3.17
4.16
7.91
3.54
4.65
8.84
Floor Drains - Full bodied
  Part No. Intake area
(mm2)
Based on 20mm
head of water (H)
Based on 30mm
head of water (H)
Based on 40mm
head of water (H)
Based on 50mm
head of water (H)
utility round 141870
141871
141872
141873
5,503
11,199
4,173
6,901
2.24
4.56
1.70
2.81
2.74
5.58
2.08
3.44
3.17
6.45
2.40
3.97
3.54
7.21
2.69
4.44
utility square 141874
141875
7,216
13,734
2.94
5.59
3.60
6.85
4.16
7.91
4.16
7.91
short round grate 141862
141864
141866
2,404
11,199
4,173
0.98
4.56
1.70
1.20
5.58
2.08
1.38
6.45
2.40
1.55
7.21
2.69
short square grate 141867 2,919 1.19 1.46 1.68 1.88
deep round 141876
141877
141878
141879
5,503
11,199
4,173
6,901
2.24
4.56
1.70
2.81
2.74
5.58
2.08
3.44
3.17
6.45
2.40
3.97
3.54
7.21
2.69
4.44
deep square 141880
141881
141882
7,216
13,734
28,310
2.94
5.59
11.53
3.60
6.85
14.12
4.16
7.91
16.30
4.65
8.84
18.23
puddle flange round 141883
141884
141885
141886
141887
141888
141889
141890
5,503
11,199
4,173
6,901
5,503
11,199
4,173
6,901
2.24
4.56
1.70
2.81
2.24
4.56
1.70
2.81
2.74
5.58
2.08
3.44
2.74
5.58
2.08
3.44
3.17
6.45
2.40
3.97
3.17
6.45
2.40
3.97
3.54
7.21
2.69
4.44
3.54
7.21
2.69
4.44
puddle flange square 141891
141892
141893
141894
141895
141896
7,216
13,734
28,310
7,216
13,734
16,971
2.94
5.59
11.53
2.94
5.59
6.91
3.60
6.85
14.12
3.60
6.85
8.46
4.16
7.91
16.30
4.16
7.91
9.77
4.65
8.84
18.23
4.65
8.84
10.93
horizontal round 141897
141898
141899
141900
141901
2,404
5,503
11,199
4,173
6,901
0.98
2.24
4.56
1.70
2.81
1.20
2.74
5.58
2.08
3.44
1.38
3.17
6.45
2.40
3.97
1.55
3.54
7.21
2.69
4.44
horizontal square 141902
141903
141904
2,123
7,216
13,734
0.86
2.94
5.59
1.06
3.60
6.85
1.22
4.16
7.91
1.37
4.65
8.84
Roof Drains
  Part No. Intake area
(mm2)
Based on 20mm
head of water (H)
Based on 30mm
head of water (H)
Based on 40mm
head of water (H)
Based on 50mm
head of water (H)
flat grate 141905
141906
141907
141908
141909
141910
141911
141912
141913
141914
15,180
15,858
22,255
15,180
15,858
16,971
15,180
15,858
15,180
15,858
6.18
6.46
9.06
6.18
6.46
6.91
6.18
6.46
6.18
6.46
7.57
7.91
11.10
7.57
7.91
8.46
7.57
7.91
7.57
7.91
8.74
9.13
12.82
8.74
9.13
9.77
8.74
9.13
8.74
9.13
9.77
10.21
14.33
9.77
10.21
10.93
9.77
10.21
9.77
10.21

care and maintenanceACO Wexel roof and floor drains require minimum maintenance when they have been correctly installed. Scheduled inspections should be carried out to ensure that they continue to perform efficiently.

Initial inspection
Once drains have been installed they should be inspected to ensure that all parts are accounted for and correctly fitted. Nuts and bolts need to be tight and secure. Care must be taken around sharp objects (screws etc.) left by other trades, as they may be trodden on. This can cause damage to the surface material and/or waterproof membrane.

Roof drain maintenance
Every flat roof must have an inspection plan. Roof inspections should be carried out on a regular basis, especially in locations where there are nearby trees creating leaf blockage.

Blockages must be cleared immediately to ensure the system does not overflow. Plastic bags will quickly block a drain or grate, whilst airborne grit and fines will silt up gradually and restrict the flow.

Floor drain maintenance
Regular drain cleaning is very important where there is the potential of severe flooding.

Floor drains are an entry point into the sanitary or stormwater drainage system. Waste is often washed down from floors as well as leaves and litter from external pavements. If maintenance is neglected, solid debris will inevitably clog the underlying pipework causing backups.

Drains in commercial kitchens need particular attention, because wastewater generally contains fats, oil and grease.

For applications requiring a more hygienic and durable solution, a stainless steel body and grate is recommended – refer to ACO Gully.

The use of strainer baskets are recommended to prevent debris from reaching pipework and resulting in costly maintenance. Strainer baskets must be cleaned regularly to remove debris and cleaning intervals are determined by the amount of debris present after each cleaning session.

ACO Wexel’s stainless steel floor grates are appropriate for general use in and around buildings including most coastal locations. Clean with soap, warm water rinse and wipe dry. Under no circumstances treat with metal scouring pads, metal scrapers or wire wool as these will contaminate surfaces leaving rust spots.

The table below is based on information gained from material suppliers and published information. Chemical resistance of materials may vary according to the concentration of chemicals used, the presence of other chemicals and other factors such as temperature.

The following information is a general guide only. It is the customer’s responsibility to ensure the suitability of the product for the application. ACO can supply material samples for testing chemical resistance.

ANo effect – excellent
BMinor effect – good
CModerate effect – fair
DSevere effect – not recommended
-No data available
ChemicalGrade 304
Stainless Steel
Cast IronNitrile Seal
Acetate solvent BBD
Acetic Acid BDC
AcetoneAAD
Alcohol (Amyl/Butyl) ACA
Alcohol (Methyl) AAB
Aluminium Chloride DDA
Aluminium Fluoride D-A
Aluminium Hydroxide ADA
Ammonia, Liquids AAB
Ammonia, Nitrate A-A
Ammonium Carbonate ACD
Ammonium Hydroxide AAB
Ammonium Nitrate AAA
Ammonium Sulphate DCA
Amyl Alcohol A-B
Antifreeze ABA
Asphalt BCB
Aviation Fuel (JP#, JP4, JP5) AAA
Barium Carbonate ABA
Barium Hydroxide CCA
BeerAAA
Benzene ABD
Benzoic Acid ADD
BenzolA-D
Boric Acid ADA
Butter BDA
Buttermilk ADA
Butyl Acetate --B
Calcium Chloride ACA
Calcium Hydroxide A-A
Cane Juice AAA
Carbon Dioxide (wet) AC-
Carbonated Water ADA
Chlorine (Dry) AA-
Chlorine Water -DD
Chocolate Syrup ADA
CiderADA
Citric Acid ADD
Coffee ACA
Cream ADA
Detergents A-A
Diesel Fuel AAA
Dyes A--
Fatty Acids ADC
Formic Acid ADD
Fruit Juice ADA
Fuel Oils ACA
Grape Juice ADA
Grease AAA
HoneyAAA
Hydraulic Oils (Petroleum) AAA
Hydrofluoric Acid (100%) DDD
Hydrogen Peroxide ADD
Hydrogen Sulfide, Aqueous Solution DDC
Ink ADA
LacquersACD
Lacquer Thinners--D
Lactic AcidADB
LardAAA
LubricantsAAA
MashA-A
MayonnaiseA-A
Methyl AcetoneADA
MilkDAD
MustardACB
Oils: AnalineAAD
CasterAAA
CitricADA
CoconutAAA
CornAAA
Fuel (1, 2, 3, 5A, 5B, 6)A-B
LemonA--
MineralAAA
OliveAAA
Oxalic Acid (Cold)ADB
ParaffinABA
Phosphoric Acid (Crude)DDD
PetroleumAAA
Potassium BromideADA
Potassium CarbonateABB
Potassium ChlorideABA
Potassium NitrateA-A
Rust InhibitorsAAA
Salad DressingADA
Sea WaterA-A
SiliconeB-A
Soap SolutionsABA
Sodium Hydroxide/Caustic Soda (20%)AAA
Sodium Hydroxide/Caustic Soda (50%)ABD
Sodium Hydroxide/Caustic Soda (80%)ACD
Sodium Hypochlorite (to 20%)CDC
Sodium PeroxideADC
Soy SauceADA
StarchACA
StyreneA-D
Sugar (Liquids)ABA
Sulphur DioxideA-D
Sulphuric Acid (to 10%)DDC
Sulphuric Acid (10-75%)DDD
Sulphuric Acid (75-100%)--D
SyrupA-A
Tomato JuiceA-A
Vegetable JuiceACA
VinegarACC
VarnishA-B
Water Distilled, Lab Grade 7ADA
Water (Fresh)ABA
Water (Salt)ADA
Weed KillersA-A
XyleneAAD
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