Drinking water tanks are underground plastic tanks for storage of drinking water. The tanks are manufactured from environmentally friendly PE material that is suitable for drinking water, according to KTW and DVGW certificate of the W270 Directive. The drinking water tanks are suitable for underground installation. The drinking water tanks are available in different volumes, all equipped with PP special screw cap, this creates a closed rubber seal and ventilation. Always use the drinking water tanks in combination with a telescopic (shaft) lid.