Pipe material and CCTV survey findings
Pipe material tells you what the system is made from; CCTV shows the visible condition inside it. A repair assessment also needs the affected length, connections and available access.
CCTV survey: recording, defect description and measured distance from the access point.
Pipe: material, diameter, shape and any recorded change of size.
Connections: branch positions, bends and the length of the affected section.
Access: chamber locations, pipe route and restrictions around buildings or occupied areas.
Reference sources for this library
These references are used across the library for the products, systems and technical points they cover. Manufacturer information applies to the named product or system; whether a repair is suitable still depends on the installed pipe, its condition and how the drain is used.
Detailed drain repair guides
Pipe materials
How deposits, corrosion, joints and access influence cleaning, coating, patch repair and structural lining in cast iron drainage.
Read the guide Technical notes Material Cast iron Possible locations Soil stacks and drainage runs Separate assessments Deposits inside the pipe and remaining structural condition Useful records Route, joints, supports and access Buried drain or above-ground stack Leaks, restriction and survey records Branches and available access Known corrosion or previous repairs Approved Document H: drainage and waste disposal
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How cracks, joints, movement, access and hydraulic constraints influence internal repair and rehabilitation in concrete drains.
Read the guide Technical notes Material Concrete Typical application Gravity drainage and sewer infrastructure Important distinctions Pipe surface, cracks, joints and movement Repair evidence Survey, dimensions and service conditions Survey with defect locations Pipe diameter and route Industrial discharge information Access and capacity constraints Approved Document H: drainage and waste disposal
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How deformation, limited access and host-pipe condition influence specialist preparation, lining or replacement in pitch fibre drains.
Read the guide Technical notes Material identification Confirm from records and competent inspection Inspect closely Deformation, internal condition and remaining passage Possible decisions Specialist preparation, lining or replacement Key limitation A liner does not automatically correct the pipe route Full survey and inaccessible lengths Extent of deformation Pipe route and branch locations Previous cleaning or repair attempts About us - Renoline
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How pipe shape, joints, support and CCTV findings influence lining, local repair or replacement in PVC-U drainage.
Read the guide Technical notes Material Unplasticised PVC (PVC-U) Typical system Gravity foul and surface-water drainage Inspect closely Shape, support, joints and branch connections Avoid assuming That every plastic drain is suitable for lining Pipe dimensions and markings if known Survey and deformation findings Drain use and discharge type Access and connection locations Wavin OsmaDrain: product and installation manual
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How joints, cracks, movement and connections influence cleaning, local repair, lining or replacement in vitrified clay drains.
Read the guide Technical notes Material Vitrified clay Typical system Underground gravity drainage Inspect closely Joints, fractures, alignment and connections First evidence CCTV survey with defect location and dimensions Survey footage and written findings Pipe diameter and route Defect position and branch locations Previous repairs or root problems Specific Design Cases | Vitrified Clay Pipes | Drainage System
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Cracked drain walls A crack in a drain wall needs to be assessed by its extent, position and host-pipe material. Pipe material alone does not determine the repair.
About us - Renoline The link above opens the original source.
Technical notes Crack extent: whether the crack is localised or recorded at several positions. CCTV evidence: recording, defect description and measured distance from the access point. Access: chamber locations, pipe route and restrictions around buildings or occupied areas. About us - Renoline
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Deep inspection chambers Inspection-chamber access varies with chamber depth and design. Those details matter when inspection or repair access is planned.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Chamber depth and opening: confirm the installed access arrangement. Investigation access: identify what can be inspected without assuming personnel entry. Wavin OsmaDrain: product and installation manual
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Drain bends A bend changes the direction of a drain and may limit how lining or inspection equipment can pass. Its position and angle matter when a repair is planned.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Bend position: measured distance from the access point and the change of direction. Passage through the bend: bore condition and any restriction shown on CCTV. Wavin OsmaDrain: product and installation manual
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Drain branches A branch brings another drain into the main run. Its position and geometry matter because any lining or local repair has to account for the connected pipework.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Branch position: measured survey location and the connected run. Connection geometry: branch layout and the condition of the surrounding pipework. Wavin OsmaDrain: product and installation manual
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Drain connections to manholes The connection where a drain enters a manhole or chamber may itself need repair. The transition and the chamber condition can affect the work required.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Connection position: where the drain enters the chamber and any defect at the transition. Chamber condition: damage or access restrictions that affect the connection. Wavin OsmaDrain: product and installation manual
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Drain pipe bedding Bedding and the surrounding fill support a drain pipe. An internal survey cannot, by itself, confirm the condition of that external support.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes CCTV finding: pipe shape, alignment and measured defect position. External support: record where bedding or surrounding fill remains unknown. Wavin OsmaDrain: product and installation manual
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Drain testing access Access points may be used for inspection or testing. The installed access and the proposed repair method determine which checks can be carried out.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Access type: identify the fitting or chamber used for inspection or testing. Repair area: note which part of the drain can be reached from that access. Wavin OsmaDrain: product and installation manual
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Drainage below buildings Drains below buildings can be difficult to reach. The route through the building matters when inspection or repair is planned.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Route: measured position of the drain beneath the building and available access points. Restrictions: bends, branches and any section that could not be reached or surveyed. Wavin OsmaDrain: product and installation manual
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Flexible drain couplings Flexible couplings join compatible sections of drainage pipe. When a nearby joint or pipe is defective, the materials, sizes and connection geometry on both sides matter.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Coupling position: measured location and the defect recorded on CCTV. Connection details: pipe materials, sizes and geometry on both sides of the coupling. Wavin OsmaDrain: product and installation manual
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Foul drain connections Foul drainage carries wastewater from connected fixtures. The route and affected connections help identify the section that needs investigation.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Affected route: identify the foul drain section and its connected branches. CCTV finding: defect description and measured position from the access point. Wavin OsmaDrain: product and installation manual
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Inspection chamber channels The channel carries flow through an inspection chamber. A channel defect should be distinguished from a defect in the pipework entering or leaving the chamber.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Channel finding: defect position within the chamber. Connected pipework: inlet and outlet positions and any separate pipe defect. Wavin OsmaDrain: product and installation manual
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Leaking drain connections Leakage at a branch or junction may need a local repair. The junction geometry and the condition of the adjoining pipework are part of that assessment.
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Technical notes Branch connection: the affected branch, junction geometry and its position in the survey. CCTV evidence: recording, defect description and measured distance from the access point. Access: chamber locations, pipe route and restrictions around buildings or occupied areas. About us - Renoline
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Open drain joints For an open or gapped joint, the repair depends on the size and position of the gap and the condition of the pipe on either side.
About us - Renoline The link above opens the original source.
Technical notes Joint condition: the reported gap and the condition of the adjacent pipework. CCTV evidence: recording, defect description and measured distance from the access point. Access: chamber locations, pipe route and restrictions around buildings or occupied areas. About us - Renoline
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Pipe diameter transitions A diameter transition changes the bore size within a drain run. Both pipe sizes and the shape of the transition matter when a repair is designed.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Size change: both pipe diameters and the measured position of the transition. Transition geometry: survey view of the change and nearby connections. Wavin OsmaDrain: product and installation manual
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Push-fit waste pipework Push-fit waste pipework should be identified separately from other waste systems. Pipe size, bore and accessible joint positions matter when inspection or repair is considered.
Wavin Osma Soil and Waste: product manual The link above opens the original source.
Technical notes System identification: confirm push-fit waste pipework and pipe size. Access: joint locations, branches and the section affected. Wavin Osma Soil and Waste: product manual
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Rainwater drain connections A rainwater connection needs a confirmed route to its intended destination before repair or reconnection is specified.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Route: confirm where the rainwater connection runs and its intended destination. Repair position: measured location and any affected junctions or bends. Wavin OsmaDrain: product and installation manual
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Ribbed-wall gravity sewer pipes Ribbed-wall gravity sewer pipe has a profiled outer wall and a smooth internal bore. Product identification and the internal survey both matter when a repair is assessed.
Wavin: foul-water drainage systems The link above opens the original source.
Technical notes Product identification: record the pipe type, size and any visible markings. CCTV finding: internal bore condition, connections and measured defect position. Wavin: foul-water drainage systems
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Ring-seal drain joints A ring-seal joint seals the connection between compatible components. Leakage, movement and an obstruction at the joint are separate findings and may lead to different repairs.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Joint finding: leakage, movement or obstruction, with its measured CCTV position. Adjacent pipework: pipe size, branch positions and any nearby bend. Wavin OsmaDrain: product and installation manual
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Rodding access points Rodding points are purpose-made access points for drainage maintenance. Their position affects which parts of a run can be inspected or reached.
Wavin OsmaDrain: product and installation manual The link above opens the original source.
Technical notes Access point: location and the section of drain it can reach. Drain route: bends, branches and distance to the reported defect. Wavin OsmaDrain: product and installation manual
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