Specifying Drainage Systems in Corrosive Environments

Drainage systems are designed primarily for function. They must perform to design and demand for the area, be it a roof, a patio or driveway. The function of the base system, once confirmed, will be the basis of the hydraulic design. Finishes will be determined by the environment they will be installed into. Such as exposure to the weather and if the location is sheltered or in a coastal environment. Additionally the project could be located in a thermal exposure zone that will challenge the best of corrosion resistant materials.

At present there are several high-profile projects that are being delivered in various exposure zones, and Allproof has been involved in aligning hydraulic design with durability requirements.

For example, a couple of prominent projects are underway in Rotorua, in the heart of the thermal zones. Work is being undertaken to remedy installed roofing products that, due to the thermal activity, have failed well within their design life. Components for the renovation are now being specified in ABS plastic to ensure the best corrosion resistance.

There are localised fumaroles (thermal steam vents) under a project for a secure health unit being completed that will subject the boundary to the highest level of thermal exposure. All stainless steel components have been detailed as grade 316 and grating as recycled GFP (glass filled recycled polypropylene) to ensure slip ratings and durability requirements align with acceptable solutions in regard to durability and accessibility.

Channel drainage around thresholds and surface water drains are often either subjected to high exposure, or situated in high exposure zones, but protected from the weather. In a sheltered corner, under a soffit for example. In these situations, cast iron can oxidise heavily, and without traffic running over it to keep the patina, can detract from the overall appearance of the project. The oxidisation does not affect the long-term durability of the product but does have an aesthetic affect on the building finish. For this reason, all of Allproof’s channel drain systems have the option of stainless steel, in SS304 or SS316 and plastic gratings (often made from 100% recycled material) that will be resilient to exposure in corrosive environments, such as sea spray or thermal activity. It is becoming apparent that traditional black plastic grates are now a high level selection with its linear design, and durable black finish to match modern colour palettes.

Interaction between designer and manufacturer is crucial to ensure that the specified product will meet design and finish aesthetic requirements. Allproof work with architects and installers to ensure that selections are correct, and then the installed product will match the selections to ensure a durable and pleasing result for the project.

Sureflow Roof Outlets & Overflows

Allproof Industries

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The SUREFLOW series of roof outlets is one of the best means of connecting a roof system to an outlet drain and is ideal for use on flat roof applications for either commercial or residential buildings.

NZ Made

NZ-Owned Business

Connection for a roof system to an outlet drain
Ideal for use on flat roof applications
Commercial or residential buildings
Compatible with other AS/NZS and NZBC compliant DWV systems, waterproofing membrane systems and flooring systems
All products are applicable to external applications

G1/AS1 Personal hygiene 1.1, 1.3.2 and clause 2.5: Allproof floor wastes are designed to provide an appropriate drainage solution for showers and various other sanitary fixtures required for personal hygiene. Floor wastes are designed to safely remove wastewater removing risk of contamination, when cleaned and correctly maintained floor wastes shall not harbour dirt and germs and prevent unpleasant odours from being emitted from the DWV system. Floor wastes for showers with a tray or a level threshold satisfy provisions of E3/AS1 internal moisture. Refer to install guides and specifications for further information.
NZBC G13/AS1 Foul water clause 1(b), 3.1(c) & (d) and clause 3.4 Floor Outlets: Allproof floor waste systems (water traps and grates) have been designed and manufactured to be compliant to all requirements set out in G13/AS1.
- The water seal in the gully prevents foul air and gases entering buildings,
- Grates are removable to access the system for maintenance and cleaning,
- Grates finish flush with the floor,
- Outlets exceed the minimum diameter.

The water seal in the gully prevents foul air and gases entering buildings,
Grates are removable to access the system for maintenance and cleaning,
Grates finish flush with the floor,
Outlets exceed the minimum diameter.

Refer to install guides and specifications for further information.

NZBC G13/AS3 Foul water and AS/NZS 3500.2 clauses 4.6: Allproof floor waste systems have been designed to comply with all criteria outlined in AS/NZS 3500.2 and modifications covered in NZBC
G13/AS3. Outlet connections designed to specifications in Appendix A of 3500.2. Gullies designed in accordance with requirements in clause 4.6.AAS 3740 clause 3.14: Allproof floor waste systems have been designed to specifications and requirements set out in AS 3740 clause 3.14 for the membrane to drainage connection following figures 3.8 and 3.9.
B2/AS1 Durability: B2.3.1 — Allproof floor waste systems meet the requirements of B2.3.1 (a) not less than 50 years, (b) not less than 15 years and (c) not less than 5 years.
NZBC E1 Surface Water. When selected and installed correctly Allproof roof drain and rainwater systems provide the appropriate solution for rainwater removal. The system includes overflows (E1.5.5) and downpipes (E1.4.0) compliant with all requirements in NZBC E1.
NZBC E2 External Moisture. Allproof roof drains are fully compatible with roofing membranes providing a sealed outlet for rainwater. Allproof roof drain outlets are designed and fully compliant with all specifications outlined in NZBC E2, specifically Figure 63 and Figure 64.

WaterMark Certificate of Conformity has been obtained on all relevant floor wate components for-

AS1260 (WMKA 21800),
WMTS-040 (WMKT 21223),
and AS2887 (WM 74706).

Storm Series

Allproof Industries

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The commercial floor drain Storm series features durable cast construction and a spigot which fits inside a pipe riser with an O-ring seal.

NZ-Owned Business

For use in commercial and public settings -such as commercial kitchens, public restrooms, food processing areas, hospitals, leisure facilities and any public space
Suit pipe size: 80mm, 100mm and 150mm
Grate sizes: 100mm, 150mm, 200mm and 300mm

NZBC E1 Surface Water:

E1.1/E1.2: Allproof Surface water drainage systems have been designed to safeguard people from injury or illness, and other property from damage caused by surface water.
E1.3.1/E1.3.2: When correctly selected for the scenario and installed in line with Allproof literature these systems will protect property from surface water in an event having a 10% probability of occurring annually or entering a property in an event having a 2% probability of occurring annually.
E1.3.3: When selected and installed correctly Allproof surface water systems with convey water to an appropriate outfall using gravity, avoid the likelihood of blockages, provide access for maintenance and clearing blockages, and avoid the likelihood of damage from superimposed loads or normal ground movements.

B2/AS1 Durability:

B2.3.1 — Allproof surface water drainage systems meet the requirements of B2.3.1 (b) not less than 15 years and (c) not less than 5 years.

AS 3996 Access covers and grates:

Allproof surface water drainage systems have been designed to comply to the specifications and testing set out in AS 3996. By complying to this standard Allproof products are made to improve the performance of trafficable covers and grates in vehicular and pedestrian areas, thus reducing risk of injury or loss through damage

NZBC G13/AS1 Foul water G13.1(b), G13.3.1(c) & (d) and clause 3.4 Floor Outlets:

Allproof floor waste systems (water traps and grates) have been designed and manufactured to be compliant to all requirements set out in G13/AS1:
- The water seal in the gully prevents foul air and gases entering buildings.
- Grates are removable to access the system for maintenance and cleaning.
- Grates finish flush with the floor.
- Outlets exceed the minimum diameter.

The water seal in the gully prevents foul air and gases entering buildings.
Grates are removable to access the system for maintenance and cleaning.
Grates finish flush with the floor.
Outlets exceed the minimum diameter.

Refer to install guides and specifications for further information.

NZBC G13/AS3 Foul water and AS/NZS 3500.2 clauses 4.6:

Allproof floor waste systems have been designed to comply with all criteria outlined in AS/NZS 3500.2 and modifications covered in NZBC G13/AS3. Outlet connections designed to specifications in Appendix A of 3500.2. Gullies designed in accordance to requirements in clause 4.6.

Other Independent Assessment

Test Results

Storm Series Double Strainer Basket

Allproof Industries

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With fixed and removable strainer baskets, the Storm series Double Strainer Basket features durable cast construction and a spigot which fits inside a pipe riser with an O-ring seal.

NZ-Owned Business

For use in commercial and public settings
Catches debris is surface water drainage preventing potential blockages in DWV systems
Easy to maintain and clean

NZBC E1 Surface Water:

E1.1/E1.2: Allproof Surface water drainage systems have been designed to safeguard people from injury or illness, and other property from damage caused by surface water.
E1.3.1/E1.3.2: When correctly selected for the scenario and installed in line with Allproof literature these systems will protect property from surface water in an event having a 10% probability of occurring annually or entering a property in an event having a 2% probability of occurring annually.
E1.3.3: When selected and installed correctly Allproof surface water systems with convey water to an appropriate outfall using gravity, avoid the likelihood of blockages, provide access for maintenance and clearing blockages, and avoid the likelihood of damage from superimposed loads or normal ground movements.

NZBC G13/AS1 Foul water G13.1(b), G13.3.1(c) & (d) and clause 3.4 Floor Outlets: Allproof floor waste systems (water traps and grates) have been designed and manufactured to be compliant to all requirements set out in G13/AS1-

The water seal in the gully prevents foul air and gases entering buildings.
Grates are removable to access the system for maintenance and cleaning.
Grates finish flush with the floor.
Outlets exceed the minimum diameter.
Refer to install guides and specifications for further information.

NZBC G13/AS3 Foul water and AS/NZS 3500.2 clauses 4.6: Allproof floor waste systems have been designed to comply with all criteria outlined in AS/NZS 3500.2 and modifications covered in NZBC G13/AS3. Outlet connections designed to specifications in Appendix A of 3500.2. Gullies designed in accordance to requirements in clause 4.6.

B2/AS1 Durability:

B2.3.1 — Allproof surface water drainage systems meet the requirements of B2.3.1 (b) not less than 15 years and (c) not less than 5 years.

AS 3996 Access covers and grates:

Allproof surface water drainage systems have been designed to comply to the specifications and testing set out in AS 3996. By complying to this standard Allproof products are made to improve the performance of trafficable covers and grates in vehicular and pedestrian areas, thus reducing risk of injury or loss through damage.

Other Independent Assessment

Commercial Channel — 200mm Clear Opening

Allproof Industries

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The Allproof Commercial Channel is a New Zealand made linear channel drain with a 200mm clear opening.

NZ Made

NZ-Owned Business

Pre-Consumer Recycled Content

The Allproof CC200 commercial linear channel drain is a medium duty high-capacity solution for external stormwater and surface water drainage. It has been designed for installation in concrete, pavers or epoxy finished floors. The trench drain gains its strength from the surrounding concrete, the 100% recycled polypropene creates an easy to handle and install system. The grates include black plastic, heelproof cast iron and 316 stainless steel wedge wire.
This system is ideal for urban pedestrianised areas, all the grates are heelproof and the 316 SS wedge wire has an R11 slip resistance rating. These features also make it an excellent option for educational facilities.
The cast iron grate is load class rated up to a classification of D allowing this versatile strip drain to also be used in loading bays, car parks and other commercial applications requiring a durable drainage solution.

NZBC E1 Surface Water:

E1.1/E1.2: Allproof Surface water drainage systems have been designed to safeguard people from injury or illness, and other property from damage caused by surface water.
E1.3.1/E1.3.2: When correctly selected for the scenario and installed in line with Allproof literature these systems will protect property from surface water in an event having a 10% probability of occurring annually or entering a property in an event having a 2% probability of occurring annually.
E1.3.3: When selected and installed correctly Allproof surface water systems with convey water to an appropriate outfall using gravity, avoid the likelihood of blockages, provide access for maintenance and clearing blockages, and avoid the likelihood of damage from superimposed loads or normal ground movements.

B2/AS1 Durability:

B2.3.1: Allproof surface water drainage systems meet the requirements of B2.3.1 (b) not less than 15 years and (c) not less than 5 years.

AS 3996 Access covers and grates:

Allproof surface water drainage systems have been designed to comply to the specifications and testing set out in AS 3996. By complying to this standard Allproof products are made to improve the performance of trafficable covers and grates in vehicular and pedestrian areas, thus reducing risk of injury or loss through damage.

Perimeter Drain

Allproof Industries

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The Perimeter Drain presents an innovative and premium solution for simplifying level threshold drainage.

NZ Made

NZ-Owned Business

Pre-Consumer Recycled Content

Allproof Level threshold solutions are designed to allow level entry to the building and be fully compliant with New Zealand standards set out in Building Code E2, External Moisture
Allproof supplies a range of E1-compliant pits and sumps that the Perimeter Drain can be connected to in order to complete the system

Design:

The grate system takes up the varying reveal between joinery overhang and slab
The grates come in a selection of materials including Glass Filed Polymer (GFP), Cast Iron and Stainless Steel that can be used to create consistency with other surface drainage in the same project (Allproof Polymer Concrete)
The grate selection accommodates for a variety of requirements including economy, performance (grate open area), safety (heelproof and slip rating) and customisation (aesthetics).

NZBC E1 Surface water:

E1.1/E1.2: Allproof level threshold drainage systems have been designed to safeguard people from injury or illness and other property from damage caused by surface water.
E1.3.1/E1.3.2: When correctly selected for the scenario and installed in line with Allproof literature, these systems will protect property from surface water.
E1.3.3: When selected and installed correctly, Allproof level threshold systems will convey water to an appropriate outfall using gravity, avoid the likelihood of blockages, provide access for maintenance and clearing blockages, and avoid the likelihood of damage from superimposed loads or normal ground movements.

NZBC E2 External moisture:

E2.7.3/Fig.17B: Allproof level threshold systems provide level entry as per Figure 17B.
E2.7.2.1: Allproof level threshold systems comply to all clause requirements regarding-
- Channel size,
- Ability to install fall in the base of the channel,
- Outlet locations and details available for sump,
- Grate independently supported of door frame,
- Removable grate,
- Designed for appropriate load class requirements,
- Grate perforations that prevent wheelchairs and mobility aids becoming trapped,
- 12mm continuous gap.

Channel size,
Ability to install fall in the base of the channel,
Outlet locations and details available for sump,
Grate independently supported of door frame,
Removable grate,
Designed for appropriate load class requirements,
Grate perforations that prevent wheelchairs and mobility aids becoming trapped,
12mm continuous gap.

B2/AS1 Durability:

B2.3.1 — Allproof level threshold systems meet the requirements of B2.3. (b) not less than 15 years and (c) not less than 5 years.

AS 3996 Access covers and grates:

Allproof surface water drainage systems have been designed to comply to the specifications and testing set out in AS 3996. By complying to this standard, Allproof products are made to improve the performance of trafficable covers and grates in vehicular and pedestrian areas, thus reducing the risk of injury or loss through damage.

Test Results

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