Extending land into water often poses challenges in maintaining the alignment of piping systems, especially when drains run across soft soil. Leca LWA serves as an excellent lightweight pipe surround, reducing pressure on the underlying soils and minimizing the risk of uneven settlement.

An additional advantage of using Leca LWA as a pipe surround is its ability to prevent damage to pipelines during backfilling. It also reduces the risk of damage caused by settlement. Furthermore, the aggregate provides thermal insulation, helping to protect pipes from energy loss or damage in freezing conditions.