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2. Pond liner - Wikipedia

   en.wikipedia.org/wiki/Pond_liner

   Pond liners need to be protected from sharp objects (for example, stones) below the liner and from being punctured by any objects in the water body. Protection can be provided with layers of sand, geotextiles (particularly needle-punched nonwovens) and other materials. Pond liners are manufactured in rolls or accordion-folded on pallets.

3. Koi pond - Wikipedia

   en.wikipedia.org/wiki/Koi_pond

   Bead filter For natural Eco System ponds, beneficial bacteria must be put into the pond to assist in the natural balance of the pond. When this is accomplished, and the pond is a sustainable ecosystem pond, try not to change out the water too often because you could be upsetting the natural balance of the pond.

4. Geosynthetic clay liner - Wikipedia

   en.wikipedia.org/wiki/Geosynthetic_clay_liner

   Geosynthetic clay liners (GCLs) are factory manufactured hydraulic barriers consisting of a layer of bentonite or other very low-permeability material supported by geotextiles and/or geomembranes, mechanically held together by needling, stitching, or chemical adhesives. Due to environmental laws, any seepage from landfills must be collected and ...

5. Cured-in-place pipe - Wikipedia

   en.wikipedia.org/wiki/Cured-in-place_pipe

   Since ground and ambient installation conditions as well as crew skills can affect the success or failure of a cure cycle, testing is performed by 3rd party laboratories in normal cases and should be requested by the owner. Samples should be representative of the installation environment since the liner is installed in the ground.

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7. Expansion joint - Wikipedia

   en.wikipedia.org/wiki/Expansion_joint

   Internal liners can be used to either protect the metallic bellows from erosion or reduce turbulence across the bellows. They must be used when purge connectors are included in the design. In order to provide enough clearance in the liner design, appropriate lateral and angular movements must be specified by the designer.