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Top 25 Plumber Interview Questions
Question 1 of 28
What would have to change about your current job, for you to stay where you are?
"For me to stay in my current job there would need to be less 'on-call' work and a higher pay rate. Currently, I am on call 3 weekends per month and my current company does not offer a competitive pay rate for my level of expertise."
What is it that you are missing from your current opportunity? If given this new position, would you be receiving all that you need from this new opportunity? Be sure to remain positive when you answer this question and avoid speaking poorly about your current supervisor or company.
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List of Plumber Interview Questions
  1. What would have to change about your current job, for you to stay where you are?
  2. What experience do you have with snaking clogged up pipes?
  3. What training do you have in plumbing?
  4. Do you prefer your water mains be pvc or copper?
  5. Have you ever changed a toilet before?
  6. Have you ever installed a shower with multiple shower heads? How did you keep water pressure high?
  7. What advantages are there for PVC water mains?
  8. Have you ever plumbed an office building?
  9. How many years experience do you have plumbing?
  10. We run a credit report and background check are you ok with that?
  11. What license do you have as a plumber?
  12. How many houses have you plumbed before?
  13. What do you enjoy most about being a plumber?
  14. How long do you want to be a plumber?
  15. If you installed a copper pipe next to the shower head, and realized you ran out of fasteners, knowing this will create a problem ten years down the road, what do you do?
  16. If a customer complains their house has too little water pressure, what steps would you take to fix this problem?
  17. What are the advantages for installing steel plumbing underneath a sink? In what cases would you do it?
  18. Do you have any experience installing water based heating systems?
  19. Do you have your own plumbing equipment?
  20. How long has it been since you've had a leak with copper piping?
  21. Who taught you mostly what you know in plumbing?
  22. Is there any other trades you are looking to learn?
  23. What is the worst thing you had to do as a plumber?
  24. Have you ever installed PEX plumbing in a concrete floor?
  25. Do you want to own your own plumbing business in the future?
  26. How does your family feel about you being on call?
  27. If a customer needs a new toilet installed, you remove the old one and find the floor to be rotting all around the toilet, what do you do?
  28. If I were to ask a previous supervisor about your performance, what would they say?
Authors:
Contributing Author
Rachelle Enns
Recruiter
 
Plumber Information
April 14th, 2017

Plumbers install, repair, and maintain pipes that carry water, gas, or sewage, as well as related appliances (e.g. water heaters). Plumbers work in homes, businesses, and factories. Plumbers must travel to the worksite and many are on call for emergency calls, meaning that you may be expected to work some evenings and weekends. Most localities require that a plumber be licensed to work. Plumbers in your locale may be unionized and you may need to find an apprenticeship through the union. Another possible path to becoming a plumber is to attend a technical school. The typical key performance area includes technical knowledge and skill and basic customer service skill.

You can find vacancies for plumbers in your local trade publications and newspapers, as well as online job boards that your local community frequents. The interview process can vary widely from company to company. A few common concerns include: the number of years of experience that you have; your ability to navigate the neighborhood(s) that you'll be providing service to; and your ability to speak, read, and write in English. Depending on the clientele that the company serves, you might be expected to speak another language as well. Punctuality, reliability, honesty, and diligence are valuable traits.

To prepare for the interview, think about examples that showcase your ability to meet deadlines and honor time obligations, as well as situations in which you were able to bring about a positive outcome due to your diligence and thoroughness. The plumbing profession has real impacts on public safety, so showing integrity and diligence will give your prospective employer confidence that you won't be reckless and put the company in legal danger. Adopt a polite, professional, and pleasant attitude to show that your company can trust you to be the face of the company out there in the field.
Plumber User Submitted Interview Answers
Question 1 of 28
What would have to change about your current job, for you to stay where you are?
"For me to stay in my current job there would need to be less 'on-call' work and a higher pay rate. Currently, I am on call 3 weekends per month and my current company does not offer a competitive pay rate for my level of expertise."
What is it that you are missing from your current opportunity? If given this new position, would you be receiving all that you need from this new opportunity? Be sure to remain positive when you answer this question and avoid speaking poorly about your current supervisor or company.
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User Submitted Interview Answers
1.
Nothing, I want a complete change of career, I have wanted to train to be a plumber for many years now.
2.
Nothing, do not want to become stagnant.
3.
Nothing I enjoy my role and daily schedule as a plumber.
4.
To have the opportunity to take parts in domestic pluming jobs, and further training in domestic plumbing.
5.
I would really like to get the position with your company.
Question 2 of 28
What experience do you have with snaking clogged up pipes?
"I have been plumbing for the past 8 years so I can safely say that I have snaked hundreds of clogged pipes. I am very comfortable with a task such as this."
This answer will depend a bit on your level of experience. You could give an approximate number to the interviewer or talk about your level of comfortability with this common plumbing task.
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User Submitted Interview Answers
1.
My men uses electrical self feed snake for sewage or grease cloggs.
2.
More than 5 years working with clogged pipes.
3.
I have snaked kitchen, lavatory, and main lines.
4.
I have opened many snaking clogged up pipes which were deeply closed in the past while I was working. Even dough I was know as a plumber guy in my resident area while I was helping our neighbor to open their toilet.
5.
I did help in changing some blocked pipes. Some pipes get crushed because of roots.
Question 3 of 28
What training do you have in plumbing?
"My training has included all of the in-class work required as well as my apprenticeship hours. I would like to continue my training to include more work on commercial properties."
This should be a simple and brief answer but also include some information on the continued training you have had.
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User Submitted Interview Answers
1.
Currently none, but have always wanted to go back to college to train and have figured that there will never be a right time, so now is a good a time as any.
2.
Working with an experienced plumber.
3.
I study and trend with golf training institute in India.
4.
My father had a plumbing company. I started working with or for him when I was about 10 years old after school and a half day on saturday. Took my journeyman license at 19 years as 3 other master plumber sinned that I had equivalent of 4 years to take the journeyman exam. Passed it, the Block exam given and graded by the University of Florida that was in 1962 I think. Then took over my dad company in 1964. Been in the business noe for 50 plus years.
5.
None, but I am ready to be challenged physically, and mentally.
Question 4 of 28
Do you prefer your water mains be pvc or copper?
"I prefer copper pipes as I feel that PVC isn’t always the safest choice. Many people are concerned that the chemicals used in the production of CPVC may cause health issues when exposed to heat. I find copper to be a safer choice especially when there will be consumption of water from those pipes."
As you may know, there is some debate between PVC and copper for the use in water mains. Be sure to pick a side and then explain your answer.
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User Submitted Interview Answers
1.
Depends, pvc is used for a natural water source compared to copper, a lot of chemicals in many humans create.
2.
PVC, as pvc is much quicker and way cheaper by far.
3.
PVC, as pvc is much quicker and way cheaper by far.
4.
Of course copper pvc is not much for heating cpvc yes of course.
5.
I prefer pvc pipes, it's cheap and easy to install.
Question 5 of 28
Have you ever changed a toilet before?
User Submitted Interview Answers
1.
Yes I install low level , and close couple pan.
2.
Yes in school for pratice.
3.
No I have never done that.
4.
Yes, I did several time. Even though I have changed my house's toilet.
5.
Got some experience . I helped and also saw how he changes the toilet.
Question 6 of 28
Have you ever installed a shower with multiple shower heads? How did you keep water pressure high?
User Submitted Interview Answers
1.
No oly the single head[rose] by using water pumper water tower.
2.
Yes. We used pump for pressure.
3.
Yes, larger pipe then reducing down.
4.
Yes by using 22mm copper pipe instead of 15mm reduced it at the tap.
5.
Yes by using 22mm copper pipe instead of 15mm reduced it at the tap.
Question 7 of 28
What advantages are there for PVC water mains?
User Submitted Interview Answers
1.
Light weight flexible water tight joints, non toxic, safe material, linger lenghts.
2.
They don't freeze as easy and also don't burst as easy as copper.
3.
If there having a any folte in water line we can make easily.
4.
Non corrosive, lower cost, easier to work with.
5.
More durable and better flow also price.
Question 8 of 28
Have you ever plumbed an office building?
User Submitted Interview Answers
1.
Yes twice now I finished on one the other day.
2.
No I have not did a lot of mock ups at school.
3.
Yeh only a little bit of work.
4.
I did have a bit of experience. Changed the tap mixture.
5.
Yes I have plumbed in an office building at domain stadium.
Question 9 of 28
How many years experience do you have plumbing?
User Submitted Interview Answers
1.
5 years and around six months.
2.
10 Years not only plumbing but also with installation, operation and maintences of RO machine.
3.
Ive done 4 weeks work experience.
4.
I have 10 yrs plumbing expierience.
5.
I have 2 years experiance.
Question 10 of 28
We run a credit report and background check are you ok with that?
User Submitted Interview Answers
1.
My score is 849 and my background is clean, go for it.
2.
Absolutely fine with that.
Question 11 of 28
What license do you have as a plumber?
User Submitted Interview Answers
1.
I only have my high school diploma as a plumber.
2.
I have get a diploma by General Mechanics and Hydraulics.
3.
As of the moment none but I will take some proper classes for plumber to upgrade my standard.
4.
Supervised gas fitting license.
5.
I have a manitoba level 2 plumbers apprentice.
Question 12 of 28
How many houses have you plumbed before?
User Submitted Interview Answers
1.
50 houses and 3 big flower and seed farms.
2.
I been working as a maintenance technician in a call center office. My work include to be a plumber.
3.
Very few but I mostly do commercial building.
4.
I have plumbed many houses with different contractors and in different towns.
5.
Certainly double figures, probably around the 20 mark.
Question 13 of 28
What do you enjoy most about being a plumber?
User Submitted Interview Answers
1.
Meeting new people and helping the community.
2.
Meeting new challenge everyday and resolving the succefully.
3.
Solving problems, working with team.
4.
Always have to think ahead about what is the best way to approach the job and also versatility of the job.
5.
Helping people and enjoying when people ask me to do what they are not able to do it or they don't want to do it.
Question 14 of 28
How long do you want to be a plumber?
User Submitted Interview Answers
1.
As long as I physically can.
2.
When I found opportunity for incrise my position.
3.
Depending on circumstances would like to go traveling at some stage and will try bring trade with me to england maybe.
4.
As long as the company is satisfied of my job.
5.
Rest of my life till my health and body are working fine.
Question 15 of 28
If you installed a copper pipe next to the shower head, and realized you ran out of fasteners, knowing this will create a problem ten years down the road, what do you do?
User Submitted Interview Answers
1.
Leave it till next time so you can get paid again the fix it again.
2.
Wait till I get the fasteners to do I proper job.
3.
It will not make problem.
4.
I given them a guarantee.
5.
Try make it as leak proof as possible and inform my boss and let him make the decision due to its him signing of the work because im nota cert plumber yet.
Question 16 of 28
If a customer complains their house has too little water pressure, what steps would you take to fix this problem?
User Submitted Interview Answers
1.
Tell them to get a new plumber.
2.
Check the pressure valve for any blockage, the taps erators and check what kind of pipe is installed at the house.
3.
To check whether every thing working properly or not.
4.
I checked the pipes and I checked also a main pipe when I found a problem, I work on that .
5.
Check under inside and outside for broken pipes or leaks.check pump system.
Question 17 of 28
What are the advantages for installing steel plumbing underneath a sink? In what cases would you do it?
User Submitted Interview Answers
1.
It will not rust, all the time.
2.
We can avoid pipe line block.
3.
Appearance, space saving.
4.
It can holds more water pressure. Nope.
5.
It has good advantage, the still pipe installation underneath because of the water has high salinity.
Question 18 of 28
Do you have any experience installing water based heating systems?
User Submitted Interview Answers
1.
The only advantage to steel piping under a sink, I believe, is that steel piping will leak less than PVC. I would only use steel piping in a sink that has a basket drainer.
2.
Yes I have any experience installing water based heating system.
3.
I have had experience installing a hot water system, but the courses I studied didn't go into depth , nd also didn't include other water based heating systems.
4.
Soler water heater and geysers.
5.
No i don't but i am eager to learn.
Question 19 of 28
Do you have your own plumbing equipment?
User Submitted Interview Answers
1.
Unfortunately not now. If it is a requirement I am willing to buy.
2.
Some we have but some rental.
3.
Hand tools, threader and power tools like drills and chop saw.
4.
Some equiptment I do have.
5.
I have all the basic things. Hammer, pipe wrenches, screwdrivers, ruler, pencil, players, adjustable wrenches.
Question 20 of 28
How long has it been since you've had a leak with copper piping?
User Submitted Interview Answers
1.
I have not yet had a leak and its been three years.
2.
I haven't done it before.
3.
It honestly has been awhile. When I first learned to solder, I always had leaks, but as I did it more I got better and only on occasion would a copper pipe leak.
4.
3 months
5.
About 8 years.
Question 21 of 28
Who taught you mostly what you know in plumbing?
User Submitted Interview Answers
1.
Installation of Showers, drainages, toilets, hand and dish wash basin, heating system, Irrigation pipe lines, Sprinklers, Fogger , and Misting pipe lines.
2.
I learned most of it through schooling and from the contractors I worked with in past.
3.
Co-workers who are journeyman plumbing.
4.
High school, and just being curious as to why and how it became broke and how it needs to be installed in order to work again.
5.
My former boss, and my only co worker taught me everything I know.
Question 22 of 28
Is there any other trades you are looking to learn?
User Submitted Interview Answers
1.
Building trade or a electrician.
2.
Is to learned more improve and latest materials used in plumbing.
3.
Currently I am 3rd year Civil Engineering students and I have a certificates by first level Electricity.
4.
Not currently. I would like to focus only on plumbing until I finish school and obtain my master's plumbing license. After I may want to learn HVAC or electrical.
5.
Electrical.
Question 23 of 28
What is the worst thing you had to do as a plumber?
User Submitted Interview Answers
1.
Unblocking the drainage will people use it.
2.
Unblocking the drainage will people use it.
3.
Changing water heater in tight space alone.
4.
My worst thing experience piping instalation with water testing to much leaking.
5.
Haha running same pipe for hot and cold.
Question 24 of 28
Have you ever installed PEX plumbing in a concrete floor?
User Submitted Interview Answers
1.
Not in concrete floor, but I have helped run pex tubing a few times, just not in a concrete floor.
Question 25 of 28
Do you want to own your own plumbing business in the future?
User Submitted Interview Answers
1.
No I would like to teach the trade in the future though.
2.
Yes, like I said earlier if I cannot work anymore, physically, do to old age or whatever it may be I would love too. If I am working, I would only open a business if I had a good partner I could trust.
3.
Probably if the economy permit it.
4.
No, not in California. This state is not small business friendly.
5.
Yes , after i have gained extensive troubleshooting knowledge and can acurating operate a professionla business.
Question 26 of 28
How does your family feel about you being on call?
User Submitted Interview Answers
1.
They are not so feel bad I think they are happy.
2.
They are fine with it. No problems at all.
3.
They understand that it comes with the position.
4.
They said its good for me to get in to.
5.
Of course sometimes they get upset depending on what we are currently doing, but they know it is my job and are happy and thankful I am able to have a job even if I am on call.
Question 27 of 28
If a customer needs a new toilet installed, you remove the old one and find the floor to be rotting all around the toilet, what do you do?
User Submitted Interview Answers
1.
Use compound to secure the floor around the toilet.
2.
He or she must called a builder to make a floor, then after a act.
3.
1st. I prepare my personal protective equipment's( PPE) 2nd.Clean the area of an old toilet. 3rd. Installed properly the new toilet. 4th. Commissioning the system has installed Properly.
4.
Advise them to replace the floor and then make a decision from what they decide too do.
5.
Replace the rotted floor and put new water closet back in with the new toilet.
Question 28 of 28
If I were to ask a previous supervisor about your performance, what would they say?
User Submitted Interview Answers
1.
That I am enthusiastic and a good listener, Learner and a good plumber.
2.
I'm not sure but they usually trust me for what I do.
3.
That I was a a hard worker punctual and rarely missed work unless I was sick.
4.
Defiantly they will say gud and hardworker.
5.
I am an excellent apprentice.
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Our best Plumber interview questions, designed to help you prepare for your upcoming job interview. Created on February 23rd, 2016

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