What is rocker pipe?
A ‘rocker pipe’ is a short length of pipe used when installing drainage at connection points with a structure or a manhole. The rocker pipe adds some flex into a drainage system and thereby allows for settlement of the ground at different rates.
What is a stub and rocker?
Stub and rocker pipes The manhole stub pipe must terminate within 150 mm from the external face of the manhole. The length of the rocker pipe used must correspond to the sewer diameter. For sewers up to 600 mm diameter, the rocker length must be 500-750 mm long.
What is pipe benching?
Benching as it relates to trenchless operations is defined as the smoothed infill concrete placed between the channel pipes and the chamber walls of a manhole. The shape and elevation of the benching prevent rodents from leaving the system and avoid the buildup of waste in the manhole that results in blockages.
What is a backdrop in drainage?
A backdrop is a drop shaft situated prior to a manhole or chamber, the main difference from a standard drop shaft being the telescopic arm that continues through into the chamber wall so as to allow access back into the incoming pipe work as shown in the drawing to the right.
What is IC chamber?
An inspection chamber is smaller than a manhole and is necessary to maintain the sewer system (e.g. cleaning, flushing the system). Inspection chambers also function to attenuate peak discharges into the system. …
What is Haunching?
The portion of the material placed in an excavation on either side of and under a pipe from the top of the bedding up to the springline or horizontal centerline of the pipe. This is the most critical area in providing support for a pipe. …
What is pipe soffit?
(pipe technology) The top point of the inside open section of a pipe or box conduit. The soffit is the highest point of the internal surface of a pipe or culvert at any cross-section. The soffit is also referred to as the pipe obvert.
What is an interceptor drain?
Drain interceptors or drain separators are seen as the final line of drainage defence. They are designed to stop contaminants from commercial and industrial sites (such as production facilities, storage areas and even car parks) from creating a pollution hazard.
Are internal backdrops allowed?
Internal backdrop connections are generally not permitted. Channels should be used to turn the discharge to the direction with the main flow. Channels and high level pipes must not conflict with existing openings, step irons and must maintain a clear 600 x 600mm clear landing area.
What fall is required for drainage?
A 110mm foul drain taking the discharge of less than 1 l/s should be laid at a 1:40 (25mm per metre) fall. A foul drain taking the discharge from a minimum of one WC can be laid at 1:80 (12.5mm per metre).
What is IC in plumbing?
Inspection chambers are access points to underground pipework which allow maintenance and the removal of blockages.
What is a rocker pipe?
(Rocker pipes are short lengths of pipe which will permit differential settlement between the pipe and chamber). In recent years this practise has spread to DI (ductile iron) water pipes and may consultants are now detailing rocker pipes on ductile iron pressure pipes.
Should rocker pipes be detailed on ductile iron pressure pipes?
In recent years this practise has spread to DI (ductile iron) water pipes and may consultants are now detailing rocker pipes on ductile iron pressure pipes. My personal view is that this is an unnecessary expense and the introduction of additional joints is a potential source of future leaks.
Does vinidex offer ductile iron pipe?
Vinidex now offers a range of ductile iron pipe that boasts superior strength, high performance and a long lifespan. The range of Vinidex ZAP ® Ductile Iron Cement Lined Pipes is supplied with 400g/m² zinc aluminium hot metal sprayed onto the external surface of the pipe, plus a 100 micron blue epoxy finishing coat to inhibit corrosion.
What is the thickness of ductile iron pipe?
The pipe is manufactured in 18- or 20-foot nominal laying lengths and 3- to 64-inch diameters in a range of standard pressure classes and nominal wall thicknesses. Ductile Iron is furnished with several different types of joints, and a wide variety of standardfittings are available without special order.