Fill in the Blanks Reading for the first timeOnline version Fill in the blanks with the word that best match. by Christian Guzmán 1 Toilets typically overflow when cannot stop and drain properly . , stop the flow by turning the valve in the back of the toilet near the wall , which shuts down water . mop up standing water before it causes any damage , then look for the source of the . First look for issues the fill tube and float that may keep the running , then look for clogs and other that are keeping the toilet from draining .