The average plumber salary at Houston Isd was $46,245 , which is 11 percent lower than the average salary for this job in Texas, and 48 percent lower than the national average for this job . Plumber salaries at Houston Isd typically range from $44,526 to $48,788 (25th to 75th percentile). The highest reported plumber salary was $51,048. There are 27 employees at Houston Isd with the job title plumber.