Can (WTAN023) water tank be used in conjunction with the (WTAN020) water pump for showering? Carel De Jager 29 April 2020 15:57 Updated Follow Our water tanks were not designed for a pump system specifically. However, an inline pump can be added to the tank. Just note that you will need to either open the cap or create a vent for airflow. Front Runner This question is about: Water Tank / 67l/17.7Gal - by Front Runner (WTAN023) Comments 0 comments Article is closed for comments.