"With SlimDrain™ we simply install the pipe using conventional processes and place the grate in later. "
Glenn Dunstone- Drainage Team Leader
SlimDrain™Pipe & Grate
SlimDrain™Installation
Finished ProductInstallation Overview
SlimDrain™ Drainage System is installed quickly and easily. Typical daily installation is 40-60 metres of pipe and grate, ready for surface finishing.
As the underlying structure of the SlimDrain™ Drainage System is the SlimDrain™ concrete pipe, there are no special techniques required to install SlimDrain™. Achieving consistent line and level is simple with the 4m pipe lengths, and if there is a requirement for a curved installation then 2m pipes can be supplied to achieve tighter radius curves.
The quick alignment design of the SlimDrain™ grate allows tool free adjustment of finished surface level, simply by inserting a steel pin in the appropriate adjustment position.
If further stability of the grate alignment is desired, the locating tabs can be screwed together to lock the entire grate structure as one. This is recommended if automated slip forming equipment is used to create the finished surface.
Installation Steps
1. Excavate trench to line and level as set out by surveyor. The trench should allow a minimum 100mm below the pipe invert for bedding, plus a minimum width of Pipe OD plus 300mm.
NOTE: When larger diameter pipes are used, a wider trench may be required in order to compact the backfill material.
2. Place and screed bedding to level.
3. Bed the SlimDrain™ pipes to line and level, ensuring the slots for the grate section are aligned. Pipes should be joined using the standard rubber ring.
4. Place and compact aggregate (5-10mm size) around the pipe haunch up to the spring line.
5. Cut the rubber rings to allow the grate to be installed.
6. Place the metal SlimDrain™ grates in position and adjust using the supplied pins so the top of the grate is at the correct alignment.
7. If the finished surface is to be slipformed, use a Teks® screw (12-24x20mm) to lock the grates together at the alignment tabs.
NOTE: Ensure the grates are aligned accurately and do not have a step that could cause the slipforming mould to catch.
8. Seal the top of the SlimDrain™ grate with duct tape to prevent ingress of concrete.
9. Place 20MPa or no-fines concrete around the top of the pipe and bring to within 100mm of finished surface level (or as specified). Care is required to bring the concrete evenly up on both sides of the pipe.
10. Once cured, place and finish a 100mm 32MPa concrete layer, or kerbing as specified on project drawings to finished surface levels.
11. The finished concrete layer should be at least 250mm wide on each side of the SlimDrain™ grate.
About Us.
James Hardie is a world leader in fibre cement, developing quality, engineered solutions for building and drainage applications.
With our ongoing commitment to the development and integration of our fibre cement technology, James Hardie has emerged as one of the most progressive, innovative companies across the globe. The James Hardie product range combines high quality, cost effective building systems for residential and commercial buildings, and high performance pipeline products for above and below ground stormwater drainage applications. The benefits inherent in fibre cement continue to deliver real value to clients throughout design, installation, and operation.Drainage Solutions
James Hardie Pipes recognise that drainage design benefits from the integration of quality componentry to provide a versatile and cost effective solution. This has been the driving force behind the intensive development of James Hardie's range of pipes, fittings, pit systems, stormwater treatment devices, and product innovations such as the SlimDrainT pavement system, slotted pipe system and median barrier. This comprehensive range enables designers to employ the cost benefits and performance levels of fibre reinforced concrete throughout stormwater drainage projects.