Hydro Max Siphonic Drainage Leaders in Siphonic Drainage

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Hydro. Max™ Siphonic Drainage Leaders in Siphonic Drainage

Hydro. Max™ Siphonic Drainage Leaders in Siphonic Drainage

Topics Covered n Brief History of Siphonic Drainage n General Principles of Gravity Rainwater

Topics Covered n Brief History of Siphonic Drainage n General Principles of Gravity Rainwater Drainage n Principles of Siphonic Drainage n Benefits and applications of Siphonic Drainage n Installation and Maintenance

Introduction to Siphonic Drainage • Prior to March 2007, there were no comprehensive product

Introduction to Siphonic Drainage • Prior to March 2007, there were no comprehensive product and design standards for siphonic drainage. • As such siphonic drainage was promoted by suppliers in different formats with various slants aimed at their own offerings • The Hydro. Max focus is on offering high quality, sustainable products with highly accurate and user friendly design software • Our approach is to dispel the “smoke and mirrors” educate how they work in accordance with the current British and/or American Standards • Technical Support to Design Engineers and Registered Installers 3

Siphonic Drainage – Brief History • • Concept invented in Finland by Olavi Ebling

Siphonic Drainage – Brief History • • Concept invented in Finland by Olavi Ebling in late 1960’s First major installation in Sweden in 1972. Unregulated Industry Grew through 1980’s UK Government Commissioned Research during the 1990’s (Refer HR Wallingford SR 463 & SR 473) European Standard BS EN 12056 -3 introduced in 2000 (1 st Standard to include a section for Siphonic drains) 2005 – ASME A 112. 6. 9 Siphonic Drain Test issued in USA 2006 – Singapore Standard SS 525 includes siphonic drainage 2007 – Comprehensive Siphonic Drainage Standards published in UK and USA (BS 8490 and APSE 45) 4

What is Hydro. Max™ Siphonic Roof Drainage? Hydro. Max™ is an innovative solution which

What is Hydro. Max™ Siphonic Roof Drainage? Hydro. Max™ is an innovative solution which utilises the power of a natural siphon to create a high-performance roof drainage solution.

Why use Hydro. Max™ Siphonic Roof Drainage? Hydro. Max™ is an Engineered Solution which

Why use Hydro. Max™ Siphonic Roof Drainage? Hydro. Max™ is an Engineered Solution which provides many Technical Benefits Hydro. Max™ offers cost savings normally ranging from 25% to 45%!

What is wrong with Traditional Gravity Drainage Systems? Traditional Gravity drainage systems work but

What is wrong with Traditional Gravity Drainage Systems? Traditional Gravity drainage systems work but they are inefficient and have a number of factors restricting performance. 7

Restrictive Factors of Gravity Drainage 1. The water flow-rate is dictated by the gradient

Restrictive Factors of Gravity Drainage 1. The water flow-rate is dictated by the gradient available (this gradient also restricts the distance a pipe can travel). 2. Multiple rainwater pipes in locations largely dictated by the gravity hydraulics rather than design team choice. 3. Gravity drains require ⅔ air to transport ⅓ water. 4. Vortex formation within vertical gravity pipes results in the water being transported in an inefficient spiral motion rather than straight through the pipe. 5. The driving force is only the depth of ponding or ‘head’ of water above the roof drain. 8

“High Performance” Gravity Drain (from Manufacturers web-site) Gravity 10” Drain – Depth = 7.

“High Performance” Gravity Drain (from Manufacturers web-site) Gravity 10” Drain – Depth = 7. 3” to Discharge 1500 GPM (250 mm Drain – Depth = 185 mm to Discharge 95 l/s)

Hydro. Max 125 mm (5”) Drain Equivalent Flow (95 l/s – 1500 GPM) Half

Hydro. Max 125 mm (5”) Drain Equivalent Flow (95 l/s – 1500 GPM) Half the Diameter Half the ponding depth of the Gravity drain 125 mm Drain – Depth = 95 mm to Discharge 95 l/s

Vertical Gravity pipes run ‘full’ at only 1/3 water ⅓ water in annular flow

Vertical Gravity pipes run ‘full’ at only 1/3 water ⅓ water in annular flow ⅔ air core

Horizontal (Sloping) Gravity pipes run ‘full’ at only 2/3 water

Horizontal (Sloping) Gravity pipes run ‘full’ at only 2/3 water

Typical Traditional Gravity Drainage System Multiple Downpipes Drainage under Building Floor Extensive Underground Drainage

Typical Traditional Gravity Drainage System Multiple Downpipes Drainage under Building Floor Extensive Underground Drainage Sloping Underground Drainage makes for difficult routing to attenuation/harvesting

Principles of Gravity Drainage Vortex motion A large amount of Air is required to

Principles of Gravity Drainage Vortex motion A large amount of Air is required to move a small amount of water. Extremely Inefficient 14 Annular Flow Water adheres to pipe wall Central Air Core

Siphonic Drainage Why is Hydro. Max™ different from gravity drainage? No Air! Pipes run

Siphonic Drainage Why is Hydro. Max™ different from gravity drainage? No Air! Pipes run 100% full bore

Principles of Hydro. Max™ Siphonic Drainage • The Siphonic Roof Drain eliminates air entering

Principles of Hydro. Max™ Siphonic Drainage • The Siphonic Roof Drain eliminates air entering the pipe promoting water filled pipework • The full bore of the pipe work carries the rainwater • Water, without air, accelerates down the vertical downpipe, creating negative pressure and naturally generating a high performance siphonic flow • The full height of the building provides the energy for this highly efficient Rainwater Drainage Solution 16

Siphonic Drainage - How it works - gh The inducer on the roof drain

Siphonic Drainage - How it works - gh The inducer on the roof drain prevents air ingress and so PAtmos Rainwater falling down the vertical pipe accelerates, creating negative pressure

Siphonic Drainage - How it works - gh PAtmos More Height = Greater Negative

Siphonic Drainage - How it works - gh PAtmos More Height = Greater Negative pressure

Siphonic Drainage - How it works - gh PAtmos Greater Negative Pressure = Higher

Siphonic Drainage - How it works - gh PAtmos Greater Negative Pressure = Higher Flow Rates The full height of the building provides the energy for this highly efficient Rainwater Drainage Solution

Siphonic Drainage - How it works Hydro. Max Siphonic Systems are self-draining therefore the

Siphonic Drainage - How it works Hydro. Max Siphonic Systems are self-draining therefore the pipes are empty before a rainfall event Roof or Gutter Hydro. Max Roof Drain Tail-pipes Horizontal collector pipe Downpipe Discharge

Hydro. Max System with Tailpipes primed Roof Pressure Hydro. Max Roof Drain Tail-pipes Horizontal

Hydro. Max System with Tailpipes primed Roof Pressure Hydro. Max Roof Drain Tail-pipes Horizontal Collector Pipe Drop pipe Discharge

Priming of Main Pipe Work Stage 1 - Wavy or Gravity flow Air above

Priming of Main Pipe Work Stage 1 - Wavy or Gravity flow Air above water Gravity flow in pipework

Priming of Main Pipe Work Stage 2 - Plug flow Plug of water filling

Priming of Main Pipe Work Stage 2 - Plug flow Plug of water filling whole pipe at high velocities which achieves self-cleansing. Air pockets driven down pipework Tests have shown that self-cleansing can be achieved at as low as 10% to 15% of the design rainfall rate.

Priming of Main Pipe Work Stage 3 - Bubble flow Water filling whole pipe

Priming of Main Pipe Work Stage 3 - Bubble flow Water filling whole pipe Air bubbles in suspension carried at high velocity

Priming of Main Pipe Work Stage 4 - Full-bore flow No more air entry

Priming of Main Pipe Work Stage 4 - Full-bore flow No more air entry – Air within Pipe now Fully Purged Water filling whole pipe

Fully Primed Hydro. Max System Negative Pressure Roof or Gutter Hydro. Max Roof Drain

Fully Primed Hydro. Max System Negative Pressure Roof or Gutter Hydro. Max Roof Drain Tail-pipes Horizontal Carrier Pipe Downpipe Discharge The full height of the building provides the energy for this highly efficient Rainwater Drainage Solution

Principles of Hydro. Max™ Siphonic Eliminate Air Ingress Pipes run Full-Bore with Water Building

Principles of Hydro. Max™ Siphonic Eliminate Air Ingress Pipes run Full-Bore with Water Building Height provides energy for High Self. Cleansing Velocities Extremely Efficient 27

Hydro. Max™ Siphonic Roof Drainage Video Click Here 28

Hydro. Max™ Siphonic Roof Drainage Video Click Here 28

Hydro. Max™ Simulation of Non-Maintained Roof Click Here 29

Hydro. Max™ Simulation of Non-Maintained Roof Click Here 29

Siphonic Roof Drainage System High Performance Roof Drains Flexible, Downpipe Positioning Significant Reduction in

Siphonic Roof Drainage System High Performance Roof Drains Flexible, Downpipe Positioning Significant Reduction in Underground Drainage No Drainage Under Building Route to Harvesting or Attenuation

System Comparison Traditional Gravity Hydro. Max Siphonic water in annular flow 31 water air

System Comparison Traditional Gravity Hydro. Max Siphonic water in annular flow 31 water air core No Air

Traditional Gravity Solution 530 metres Pipework Diameters 160 mm to 450 mm 60 m

Traditional Gravity Solution 530 metres Pipework Diameters 160 mm to 450 mm 60 m Hydro. Max Siphonic Scheme 360 metres HDPE Pipework Diameters 56 mm to 200 mm 32 100 m

Hydro. Max System Termination Manhole or Catch Pit to have Grate Cover Note: British

Hydro. Max System Termination Manhole or Catch Pit to have Grate Cover Note: British Standard BS 8490 states the size of free area for the Grate should be twice cross sectional area of siphonic pipe. American ASPE Technical Design Standard 45 does not dictate the size of vented area. 33 Siphonic pipework should enter manhole chamber above the drain invert and be clear of any standing water to ensure free discharge

Hydro. Max Siphonic System Termination Important: Below Grade Drain must be vented and sized

Hydro. Max Siphonic System Termination Important: Below Grade Drain must be vented and sized to take the volume of discharge under Gravity flow conditions. Do not size to match siphonic Pipe diameter. Vertical Siphonic Pipe Offset (if required) to line up with below grade pipe Flex-Seal flexible, expansion coupling

Hydro. Max Siphonic System Termination Important: If siphonic drainage is utilised to drain part

Hydro. Max Siphonic System Termination Important: If siphonic drainage is utilised to drain part way down a high rise building – A siphon break point must be adequately vented to atmosphere at the point of transition to gravity flow.

Hydro. Max Siphonic System Termination Ventilated to Atmosphere Recommended Vent size being Two-Thirds Gravity

Hydro. Max Siphonic System Termination Ventilated to Atmosphere Recommended Vent size being Two-Thirds Gravity Pipe size (two-thirds air to one third water in the gravity pipe) Siphonic flow Break to Gravity flow

Suitable Projects for Siphonic Drainage Retail Chains 37

Suitable Projects for Siphonic Drainage Retail Chains 37

Suitable Projects for Siphonic Drainage Stadia Royal Ascot Racecourse Ricoh Stadium and Arena, Coventry

Suitable Projects for Siphonic Drainage Stadia Royal Ascot Racecourse Ricoh Stadium and Arena, Coventry Stadium of Light, Sunderland

Suitable Projects for Siphonic Drainage Dundrum Retail 313 Shopping Orchard. Malls Road, with Singapore

Suitable Projects for Siphonic Drainage Dundrum Retail 313 Shopping Orchard. Malls Road, with Singapore multi-level Car Parks

Suitable Projects for Siphonic Drainage Commercial Office Buildings E-Tek Flagship Trinidad Accident Fund, Lansing

Suitable Projects for Siphonic Drainage Commercial Office Buildings E-Tek Flagship Trinidad Accident Fund, Lansing Stryker HQ, Newbury

Suitable Projects for Siphonic Drainage Accommodation/Hotels/Prisons Student Accommodation, Wembley Johnstone County Detention Center Ibis

Suitable Projects for Siphonic Drainage Accommodation/Hotels/Prisons Student Accommodation, Wembley Johnstone County Detention Center Ibis Hotel, Singapore

Suitable Projects for Siphonic Drainage Hospitals Forest Park Medical Center, Dallas Mercy Hospital, Des

Suitable Projects for Siphonic Drainage Hospitals Forest Park Medical Center, Dallas Mercy Hospital, Des Moines, IA

Suitable Projects for Siphonic Drainage Apartment Blocks Podium Decks

Suitable Projects for Siphonic Drainage Apartment Blocks Podium Decks

Suitable Projects for Siphonic Drainage Green Roofs

Suitable Projects for Siphonic Drainage Green Roofs

Suitable Projects for Siphonic Drainage Siphonic Drains installed at waterproofing membrane level Green Roofs

Suitable Projects for Siphonic Drainage Siphonic Drains installed at waterproofing membrane level Green Roofs 45

Suitable Projects for Siphonic Drainage Airports Gimhae South Korea

Suitable Projects for Siphonic Drainage Airports Gimhae South Korea

Suitable Projects for Siphonic Drainage Warehousing & Distribution Centres 47 110, 000 m² for

Suitable Projects for Siphonic Drainage Warehousing & Distribution Centres 47 110, 000 m² for Tesco

Suitable Projects for Siphonic Drainage Manufacturing Plants 48

Suitable Projects for Siphonic Drainage Manufacturing Plants 48

Suitable Projects for Siphonic Drainage Flagship Projects Scottish Parliament 49

Suitable Projects for Siphonic Drainage Flagship Projects Scottish Parliament 49

Suitable Projects for Siphonic Drainage Flagship Projects Masdar City MIST 1 B, Abu Dhabi

Suitable Projects for Siphonic Drainage Flagship Projects Masdar City MIST 1 B, Abu Dhabi 50

Hydro. Max Siphonic Products 50 mm Balcony Siphonic Roof Drain This is a special

Hydro. Max Siphonic Products 50 mm Balcony Siphonic Roof Drain This is a special drain for multi floor balcony drainage. The drain has a built in Anti-Backflow device. Flow Rate Max. = 1. 5 l/s (Litres per Second) 51

Hydro. Max Siphonic Products 50 mm Terrace Siphonic Roof Drain Flow Rate Min. =

Hydro. Max Siphonic Products 50 mm Terrace Siphonic Roof Drain Flow Rate Min. = 1. 5 l/s (Litres per Second) up to Max. = 25 l/s 52

Hydro. Max Siphonic Products 75 mm Siphonic Roof Drain Our Metric series of drains

Hydro. Max Siphonic Products 75 mm Siphonic Roof Drain Our Metric series of drains come in a range of models for compatibility with all roof types Flow Rate Min. = 1. 5 l/s (Litres per Second) up to Max. = 25 l/s 53

Hydro. Max Siphonic Products 75 mm Siphonic Overflow Roof Drain Our Metric series of

Hydro. Max Siphonic Products 75 mm Siphonic Overflow Roof Drain Our Metric series of Overflow drains come in a range of models for compatibility with all roof types Flow Rate Min. = 1. 5 l/s (Litres per Second) up to Max. = 25 l/s 54

Hydro. Max Siphonic Products 125 mm Siphonic Roof Drain Our Metric series of drains

Hydro. Max Siphonic Products 125 mm Siphonic Roof Drain Our Metric series of drains come in a range of models for compatibility with all roof types Flow Rate Min. = 10 l/s (Litres per Second) up to Max. = 100 l/s 55

Hydro. Max Siphonic Products Range of Accessories for Our Metric Series of Drains •

Hydro. Max Siphonic Products Range of Accessories for Our Metric Series of Drains • Leafguards • Gravel Guards • Car Park Drains • Bespoke Accessories 56

Wade-Hydro. Max Siphonic Products 3” Siphonic Roof Drain Our North American series of drains

Wade-Hydro. Max Siphonic Products 3” Siphonic Roof Drain Our North American series of drains have all been tested to ASME 112. 6. 9: 2005 – IAPMO certified (file number 5305) Flow Rate Min. = 23 GPM (Gallons per Minute ) up to Max. = 415 GPM 57

Wade-Hydro. Max Siphonic Products 4” Siphonic Roof Drain Our North American series of drains

Wade-Hydro. Max Siphonic Products 4” Siphonic Roof Drain Our North American series of drains have all been tested to ASME 112. 6. 9: 2005 – IAPMO certified (file number 5305) Flow Rate Min. = 75 GPM (Gallons per Minute ) up to Max. = 750 GPM 58

Wade-Hydro. Max Siphonic Products 5” Siphonic Roof Drain Our North American series of drains

Wade-Hydro. Max Siphonic Products 5” Siphonic Roof Drain Our North American series of drains have all been tested to ASME 112. 6. 9: 2005 – IAPMO certified (file number 5305) Flow Rate Min. = 120 GPM (Gallons per Minute ) up to Max. = 1300 GPM 59

Wade-Hydro. Max Siphonic Products 6” Siphonic Roof Drain Our North American series of drains

Wade-Hydro. Max Siphonic Products 6” Siphonic Roof Drain Our North American series of drains have all been tested to ASME 112. 6. 9: 2005 – IAPMO certified (file number 5305) Flow Rate Min. = 160 GPM (Gallons per Minute ) up to Max. = 1800 GPM 60

Wade-Hydro. Max Siphonic Products 3”, 4”, 5” and 6” Siphonic Roof Overflow Drain Our

Wade-Hydro. Max Siphonic Products 3”, 4”, 5” and 6” Siphonic Roof Overflow Drain Our North American series of drains have all been tested to ASME 112. 6. 9: 2005 – IAPMO certified (file number 5305) 61 C. I. No-Hub Outlet 3” 4” 5” 6” K factor 0. 12 0. 08 0. 04 Minimum GPM Inflow 23 75 120 160 Maximum GPM Inflow 415 750 1300 1800

Wade-Hydro. Max Siphonic Products 3”, 4”, 5” and 6” Drain Accessories Leafguards, Debris Guards,

Wade-Hydro. Max Siphonic Products 3”, 4”, 5” and 6” Drain Accessories Leafguards, Debris Guards, Underdeck Clamps and Bearing Pans are available for all drains. Our 3” and 4” Drains are available as Podium Deck Drains Drain shown with Debris Guard 62

Hydro. Max Siphonic Drain Benefits • High Performance • Versatile and Compatible with any

Hydro. Max Siphonic Drain Benefits • High Performance • Versatile and Compatible with any Roof • Compact for installation in gutters/scuppers • Anti Tamper Fastening of one-piece Inducer • Proven track record of Low Maintenance 63

Hydro. Max™ HDPE Siphonic System Pre-Fabricated in Factory Controlled Conditions with Engineered Rail Fastening

Hydro. Max™ HDPE Siphonic System Pre-Fabricated in Factory Controlled Conditions with Engineered Rail Fastening System 64

Hydro. Max™ Siphonic System 60, 000 m² Roof Only 4 Rainwater Downpipes draining the

Hydro. Max™ Siphonic System 60, 000 m² Roof Only 4 Rainwater Downpipes draining the Main Roof 65

Hydro. Max™ Siphonic System Hydro. Max™ Collector Pipe at High Level 66

Hydro. Max™ Siphonic System Hydro. Max™ Collector Pipe at High Level 66

Hydro. Max™ Siphonic System Level, Small Diameter, Pipes Makes for Easy Co-ordination with structure

Hydro. Max™ Siphonic System Level, Small Diameter, Pipes Makes for Easy Co-ordination with structure and services 67

Hydro. Max™ Siphonic System Hydro. Max™ Pipework Installed Absolutely Flat Level at High level

Hydro. Max™ Siphonic System Hydro. Max™ Pipework Installed Absolutely Flat Level at High level 68

Development of Key Standards & Codes • BS EN 12056 -3: 2000 (includes Siphonic

Development of Key Standards & Codes • BS EN 12056 -3: 2000 (includes Siphonic Drain Test) • ASME 112. 6. 9: 2005 (Siphonic Drain Test) • ASPE Technical Design Standard 45: 2007 (Design, Installation & Product Standard) • BS 8490: 2007 (Design, Installation & Product Test Standard)

Development of Hydro. Max™ • Consultation with HR Wallingford (previously commissioned by UK Government

Development of Hydro. Max™ • Consultation with HR Wallingford (previously commissioned by UK Government to study siphonic drainage) ensured our offering progressed the technology above competitors systems • Hydro. Technic™ hydraulic calculations report extreme conditions giving high accuracy (other systems report average hydraulic conditions) • Independently tested by Hydraulic Research Centre Wallingford (HRW) for compliance with BS EN 12056 -3: 2000 • Independently tested to ASME 112. 6. 9 (IAPMO File #5305) • Full Compliance with current SS 525, BS 8490: 2007 & ASPE 45 • 100% Success Rate

Development of Hydro. Max™ • Full Compliance with SS 525: 2006 • Full Compliance

Development of Hydro. Max™ • Full Compliance with SS 525: 2006 • Full Compliance with BS 8490: 2007 • Full Compliance with ASPE Design & Engineering Standard 45 • 100% Success Rate

Primary and Overflow Systems Using Hydro. Max Overflow System can offer the same technical

Primary and Overflow Systems Using Hydro. Max Overflow System can offer the same technical and commercial benefits obtained using the Hydro. Max™ Primary Drains • • Primary Roof Drains installed at roof level or at gutter sole level Drains direct to underground drainage Raised Inlet to Drain 50 mm • • • 72 Overflow Roof Drain Inlet raised to 50 mm above gutter sole. Drains to Atmosphere often at high level or to walkways or car parks Must not connect to Primary System (as this would normally be a vent)

Maintenance by Design Primary Drain Overflow Drain Raised Inducer Level Roof Level Regional Options:

Maintenance by Design Primary Drain Overflow Drain Raised Inducer Level Roof Level Regional Options: Dry Season Covers for Gulf Region 73

Siphonic Drainage Analytical Design Program Hydro. Max™ provides the following: • Web based Hydro.

Siphonic Drainage Analytical Design Program Hydro. Max™ provides the following: • Web based Hydro. Technic™ program for easy Technical Support • Fast Accurate Calculations in full compliance with SS 525, BS 8490 & ASPE 45 • Advanced Edit Functions to accommodate on-site changes • Program Generation of Pre-Fabrication Drawings (Eliminates risk of human interface errors) • Exports data in electronic format for O & M files 74

Siphonic Drainage Analytical Design Program Metric Version Following calculation of. USA rainfall inflows of

Siphonic Drainage Analytical Design Program Metric Version Following calculation of. USA rainfall inflows of required pipe routing, Version ft/inand anddetermination GPM the Design Engineer ‘Draws’ the piping system into the calculation program

Pipe diameters are edited to find the USA Version optimum solution 76 Metric Version

Pipe diameters are edited to find the USA Version optimum solution 76 Metric Version

Key Advantages with Hydro. Max™ • Drains independently tested to: – BS 8490: 2007

Key Advantages with Hydro. Max™ • Drains independently tested to: – BS 8490: 2007 – ASME 112. 6. 9: 2005 • Designs to BS 8490 or ASPE 45 • Independently tested Hydro. Technic™ design software (confirmed to have “unsurpassed accuracy”) • Range of High Performance Roof Drains (Outlets) • HDPE Pipes to EN 1519 (not for North American Market) 77

Key Advantages for Building Owners • High Performance, Self-Cleansing Roof Drainage System • Fewer

Key Advantages for Building Owners • High Performance, Self-Cleansing Roof Drainage System • Fewer Rainwater Downpipes routed to convenient positions providing an increased and flexible use of floor space • Proven Record of Low Maintenance • Elimination of underground drainage, manholes, etc. within the building footprint 78

Key Advantages for the Design Team • Smaller diameter horizontal pipework installed level •

Key Advantages for the Design Team • Smaller diameter horizontal pipework installed level • An Engineered Solution allowing choice of discharge locations • Flexible Pipe routing with easy co-ordination of services • Rainwater Management - Hydro. Max™ can route pipework to attenuation/rainwater harvesting. 79

Key Advantages for the Main Contractor • Improved Construction Build Program • Significant Cost

Key Advantages for the Main Contractor • Improved Construction Build Program • Significant Cost Savings • A dry building envelope is attained at an early stage of construction allowing fit-out works to proceed earlier • Less Trench work for below ground drainage saving excavation, soil treatment, pipe laying, back fill compaction, etc. 80

Engineers Training Day – Topics Covered • • • Key Aspects of BS 8490:

Engineers Training Day – Topics Covered • • • Key Aspects of BS 8490: 2007/ASPE 45/SS 525 Hydraulic Parameters Piping Layout Design (do’s and don'ts) Hands-on Hydro. Technic training Understanding how to Edit Systems within Hydro. Technic™ to cater for design or onsite changes • Specification Writing 81

Information Requirements For Hydro. Max to Provide Concept Designs • • 82 Design Rainfall

Information Requirements For Hydro. Max to Provide Concept Designs • • 82 Design Rainfall Rate Roof Plan Drawings (Auto. CAD) Floor Plan Drawings (Auto. CAD) Sections/Elevation Drawings (Auto. CAD) Underground drainage Connections Attenuation or Rainwater Harvesting Requirements Gutter Profile (to allow compatibility checks) Specification (we can provide CSI or R 10 type spec. )

Hydro. Max™ Siphonic Drainage Leaders in Siphonic Drainage www. hydromax. com

Hydro. Max™ Siphonic Drainage Leaders in Siphonic Drainage www. hydromax. com