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A Short Liner is ideal for isolated, locally limited defects, while an inversion liner is generally the better choice when longer sections of pipe need to be rehabilitated. Typical applications for Short Liner rehabilitation include cracks, leaking pipe joints and localised structural damage. If several defects occur along a longer section of pipe, trenchless rehabilitation using an inversion liner may be the more economical and technically suitable solution. In practice, the right method should always be selected based on the CCTV inspection, type and extent of damage, pipe diameter, length of the damaged section and accessibility.

Short Liners are ideal for repairing clearly defined local defects without having to rehabilitate the entire pipe section. Typical applications include cracks, leaking pipe joints, fractures and other localised pipe damage. A resin-impregnated glass fibre laminate is positioned at the damaged area using a suitable repair packer and pressed against the inside of the pipe until the resin has cured. If numerous defects occur in succession or a longer section of pipe is affected, an inversion liner rehabilitation should be considered instead of multiple individual Short Liner repairs.

For a reliable Short Liner repair, the resin system, glass fibre laminate, repair packer and installation accessories must be compatible with each other. Depending on the application, the system typically includes Short Liner resin, glass fibre laminate, repair packers and the appropriate installation accessories such as air push rods and protective films. From an installer’s point of view, selecting the equipment based on the pipe diameter alone is not enough. The type of defect, Short Liner length, pipe geometry, temperature and installation conditions must also be taken into account.

The correct repair packer is selected primarily according to the pipe diameter, location of the defect, pipe geometry and required Short Liner length. Straight pipe sections may require a different packer design than bends or difficult-to-access lateral connections. The key requirement is that the packer can transport the resin-impregnated Short Liner safely to the damaged area and press it evenly against the existing pipe wall during curing. Depending on the application, different solutions such as lateral connection packers, bend packers and multi-purpose repair packers can be used.

Inversion liner rehabilitation is particularly suitable when a longer section of pipe needs to be rehabilitated rather than repairing only one isolated defect. A complete system typically consists of a suitable inversion liner, resin system and the required inversion and installation equipment. Depending on the system, calibration hoses and other processing accessories may also be required. The correct combination depends on factors such as pipe diameter, pipe run length, pipe geometry, installation conditions and the selected curing method. Especially when rehabilitating longer pipe sections, matching the liner, resin and installation equipment correctly is essential for a reliable and economical installation.