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Leach Drain Kit - Two Leach Drains

  • Image 1
  • Standard Installation
  • Residential Installation
  • Residential Installation
Price:
$917.50
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Product Description

The Drainwell module system is very versitile and can be utilised for leech drains from a septic tank.

Features and Benefits

  • Strong structural design - can be installed under driveways, carparks and other trafficable areas therefore increasing the use of valuable land.
  • Infiltration - large permeable area including sides and ends.
  • Larger volumes with fewer modules - projects require fewer modules resulting in less assembly time.
  • Chemically inert - the units will not be affected by harmful chemicals, therefore increasing the product life.
  • 90mm and 150mm Cut Out Guides for DWV - Allows for simple pipe connection therefore less time is taken for installation.
  • UV Stabalised - for increased product life.
  • 100% Recycled Polypropolene - Environmentally freindly.
  • Modular - The units interlock vertically and position horizontally to create any size and shape required.
  • Lightweight - easy to handle. No crane required.
  • Flat Pack Form - Easy to transport and save on bulky transport expenses.
  • Manufactured in Australia.

Measurements

Each Drainwell Module is made up of a number of large and small plates. Each large plate measures 755mm long x 400mm wide x 20mm high. Each small plate measures 400mm long x 440mm high x 20mm wide. One complete Drainwell module measures 755mm long x 400mm wide x 440mm high.

Capacity

Each module will hold a capacity of 132 litres.

Tanks per m3

7.5 tanks fit into one cubic metre of space.

Types

There are three main types of Drainwell:

  • Normal Duty - maximum load of 23.66 t/m2
    These modules feature three small panels (with one internal panel)
     
  • Heavy Duty - maximum load of 29.76 t/m2
    These modules feature four small panels (with four internal panel)
     
  • Extra Heavy Duty - maximum load of 32.42 t/m2
    These modules feature five small panels (with three internal panel) 
 
LEACH DRAIN KITS
 
Each kit consists of:
  • Plates to build the Drainwell Modules
  • Geotextile - to wrap around the Drainwell Modules

 

LEACH DRAIN OPTIONS

The size of the leach drains required depend upon the number of bedrooms in the home and the type of soil they will be buried in.

Following are the number of Drainwell units contained in the kit dependent upon the number of bedrooms and soil type:

Soil Type: Sandy Soil

Number of Bedrooms   Trenches Required   Units Required
2 Bedrooms or Less   2 x 7.55 metres   20
3 Bedrooms   2 x 9.82 metres   26
4 Bedrooms or More   2 x 10.57 metres   28

 

Soil Type: Gravel or Loam Soil

Number of Bedrooms   Trenches Required   Units Required
2 Bedrooms or Less   2 x 7.55 metres   30
3 Bedrooms   2 x 9.82 metres   40
4 Bedrooms or More   2 x 10.57 metres   44

The numbers above represent the requirements stipulated from the Western Australian Health Department.

 

COMPONETS OF A MODULE

 

large-plate.jpg

LARGE PANEL (WITHOUT PINS)

small-plate.jpg

SMALL PANEL (WITH PINS)

 
MODULE ASSEMBLY INSTRUCTIONS
 
installation-instructions-1.jpg  

STEP 1
Place 1 x Large Panel onto a firm flat surface.
Then insert the required number of Small Panels with the 400mm side into the Large Panel.

installation-instructions-2.jpg  

STEP 2
Insert 1 x Large Panel onto the top of the Small Panels.

installation-instructions-3.jpg  

STEP 3
Turn module over and insert 1 x Large Panel onto the top.

installation-instructions-4.jpg  

STEP 4
Turn module over and insert another Large Panel onto the top.

 
TYPICAL INSTALLATION INSTRUCTIONS
 
INFILTRATION SYSTEM
  1. Form a pit by excavation, according to specified dimensions.
  2. Level base of pit and compact.
  3. Backfill pit with a minimum 100mm of coarse sand, and compact.
  4. Line base and walls of pit with Geotextile ensuring that seams have a minimum 200mm overlap. Seal joints with adhesive PVC tape. Allow sufficient Geotextile length to cover the surface of the Drainwell modules once positioned in pit.
  5. Place assembled Drainwell modules into position, on top of Geotextile, inside pit. Ensure modules are placed with 440mm side in the upright position.
  6. If required, secure Drainwell modules together with clips or heavy duty cable ties.
  7. Cut holes in the correct position for inlet and outlet pipes. Outlet must be positioned lower than inlet.
  8. Tightly cover the sides and top of modules with Geotextile. Ensure overlaps and inlet/outlet areas are sealed with adhesive PVC tape.
  9. Backfill around sides and top of modules with minimum 100mm clean coarse sand and compact according to engineers specifications.
  10. Backfill a minimum 600mm of clean fill on top of modules and compact according to engineers specifications.

ADDITIONAL INSTALLATION NOTES

  1. It is important that every Drainwell installation is fitted with an overflow or vent.
  2. Any connection of inlet or outlet piping through liner should be made with a good seal around penetration point.
  3. Pre-filtration of stormwater is an essential component of every Drainwell system.
  4. If the Drainwell installation is to be under a carpark or trafficable area, it is recommended to use a layer of woven Geotextile on top of the Drainwell modules. It should extend a minimum 500mm beyond the perimeter of the excavation.

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