Erratum: Water Practice and Technology (2022) 17 (11): 2447–2462: Know-what, know-when and know-how: A web and mobile-based android application for early detection of pump failures in rural water supply projects, Tanzania, Leah Isack Marwa, Subira Munishi, Tulinave B. Mwamila, https://doi.org/10.2166/wpt.2022.136