TEXAS STATE PLUMBING INSPECTORS EXAM SCRIPT 2025
QUESTIONS WITH SOLUTIONS RATED A+
✔✔PEX pipe must be separated from a water heater by some type of metal connector
at least how long - ✔✔18 in
✔✔Inlet and outlet copper water connections to an electric water heater should contain -
✔✔Dielectric unions
✔✔You want to run a water service line above a sewer pipe in the same trench. How
much dirt must be laid between the pipes - ✔✔12 in
✔✔A reduced pressure principle assembly is listed for - ✔✔Backsiphonage and
backpressure
✔✔If a water service line and a sewer pipe cannot be installed in the same trench at
different levels, they can be installed at the same level in the ground as long as how
much earth separates them - ✔✔5 ft
✔✔Pure water at sea level weights how much per cubic foot - ✔✔62.4
✔✔The minimum size of a water service is - ✔✔3/4 in
✔✔An air gap has a minimum requirement of at least 1 in or how much the diameter of
the pipe - ✔✔2
✔✔A negative pressure that can cause backflow is known as - ✔✔Backsiphonage
✔✔Solder joints shall be according to ASTM - ✔✔B-828
✔✔What color shall be used to identify reclaimed, rain and gray water distribution
systems - ✔✔Purple
✔✔Full open valves shall be isntalled in the following locations - ✔✔On the discharge
side of every water meter
✔✔Selecting an expansion tank is based on - ✔✔Water pressure and volume
✔✔For automatic circulating hot water and heat traced systems, the piping shall be
insulated with not less than how much insulation - ✔✔1 in
✔✔Which of the following types of joints can be used to join dissimilar piping materials -
✔✔Mechanical
, ✔✔Sewage ejector pumps are required to have what installed on the discharge piping
from the sewage pump - ✔✔Check valve
✔✔Cleanout plugs can be of what kind of material - ✔✔Plastic
✔✔Clean outs on concealed piping or piping underfloor slab or in a crawl space of less
than how much shall have flush terminations - ✔✔24 in
✔✔Suppose you want to turn a vertical drain to a horizontal position which kind of fitting
cannot be used do this - ✔✔Sanitary tee
✔✔All horizontal drains shall be provided with cleanouts located not more than how
many feet apart - ✔✔100 ft
✔✔Blow back water closets can be installed back to back when they share a common
back wall what fitting should be used - ✔✔Double combination and wye
✔✔No galvanized wrought iron or galvanized steel pipe shall be used underground and
shall be kept not less than how much above ground - ✔✔6 in
✔✔Horizontal branches shall connect to the bases of stacks at a point located not less
than how many times the diameter of the drainage stack downstream from the stack -
✔✔10
✔✔Cleanouts on 6 in and smaller pipes shall be provided with a clearance of not less
than how much for rodding? - ✔✔18 in
✔✔All health care related fixtures devices and equipment shall discharge ot the
drainage system through an indirect waste pipe by means of what? - ✔✔Air gap
✔✔What type of connection is required when a clothes washing machine discharges
into a sanitary drainage system? - ✔✔An idirect waste
✔✔Which of the following would you choose to be the most positive means of protection
when using an indirect waste? - ✔✔Air gap
✔✔What is the minimum allowable height of the standpipe for the receptor? - ✔✔18 in
✔✔Can you install an indirect waste receptor in a closet? - ✔✔No
QUESTIONS WITH SOLUTIONS RATED A+
✔✔PEX pipe must be separated from a water heater by some type of metal connector
at least how long - ✔✔18 in
✔✔Inlet and outlet copper water connections to an electric water heater should contain -
✔✔Dielectric unions
✔✔You want to run a water service line above a sewer pipe in the same trench. How
much dirt must be laid between the pipes - ✔✔12 in
✔✔A reduced pressure principle assembly is listed for - ✔✔Backsiphonage and
backpressure
✔✔If a water service line and a sewer pipe cannot be installed in the same trench at
different levels, they can be installed at the same level in the ground as long as how
much earth separates them - ✔✔5 ft
✔✔Pure water at sea level weights how much per cubic foot - ✔✔62.4
✔✔The minimum size of a water service is - ✔✔3/4 in
✔✔An air gap has a minimum requirement of at least 1 in or how much the diameter of
the pipe - ✔✔2
✔✔A negative pressure that can cause backflow is known as - ✔✔Backsiphonage
✔✔Solder joints shall be according to ASTM - ✔✔B-828
✔✔What color shall be used to identify reclaimed, rain and gray water distribution
systems - ✔✔Purple
✔✔Full open valves shall be isntalled in the following locations - ✔✔On the discharge
side of every water meter
✔✔Selecting an expansion tank is based on - ✔✔Water pressure and volume
✔✔For automatic circulating hot water and heat traced systems, the piping shall be
insulated with not less than how much insulation - ✔✔1 in
✔✔Which of the following types of joints can be used to join dissimilar piping materials -
✔✔Mechanical
, ✔✔Sewage ejector pumps are required to have what installed on the discharge piping
from the sewage pump - ✔✔Check valve
✔✔Cleanout plugs can be of what kind of material - ✔✔Plastic
✔✔Clean outs on concealed piping or piping underfloor slab or in a crawl space of less
than how much shall have flush terminations - ✔✔24 in
✔✔Suppose you want to turn a vertical drain to a horizontal position which kind of fitting
cannot be used do this - ✔✔Sanitary tee
✔✔All horizontal drains shall be provided with cleanouts located not more than how
many feet apart - ✔✔100 ft
✔✔Blow back water closets can be installed back to back when they share a common
back wall what fitting should be used - ✔✔Double combination and wye
✔✔No galvanized wrought iron or galvanized steel pipe shall be used underground and
shall be kept not less than how much above ground - ✔✔6 in
✔✔Horizontal branches shall connect to the bases of stacks at a point located not less
than how many times the diameter of the drainage stack downstream from the stack -
✔✔10
✔✔Cleanouts on 6 in and smaller pipes shall be provided with a clearance of not less
than how much for rodding? - ✔✔18 in
✔✔All health care related fixtures devices and equipment shall discharge ot the
drainage system through an indirect waste pipe by means of what? - ✔✔Air gap
✔✔What type of connection is required when a clothes washing machine discharges
into a sanitary drainage system? - ✔✔An idirect waste
✔✔Which of the following would you choose to be the most positive means of protection
when using an indirect waste? - ✔✔Air gap
✔✔What is the minimum allowable height of the standpipe for the receptor? - ✔✔18 in
✔✔Can you install an indirect waste receptor in a closet? - ✔✔No
