Fabricated polyethylene tanks generally require more baffles than a stainless steel or aluminium tank. This can be an issue with large holding tanks.

Polyethylene tanks can “grow” slightly with a large increase in ambient temperature.

Polyethylene diesel tanks may discolour after a few years.

Fabricated polyethylene tanks are not suitable for petrol.

Fabricated polyethylene tanks cannot have curved surfaces, however a moulded polyethylene tank can.