Scottsdale’s Premier Plumbing Service

Your Plumber Is Here

 
Mark One Plumbing is the residential and commercial plumber you can depend on for reliable work at a reasonable cost. We offer a wide range of services, installation and maintenance.

We’re proud of our many satisfied customers – all gained through word of mouth recommendations from other satisfied customers. Click Here to read what customers say about Mark One Plumbing

Contact us now for a free quotation or to discuss your needs

Our Clients Are Talking

On Our “Good Guy” List!

This is the third time that we have used Mark's services. He is very professional and fast, and shows up on time. He also returns calls promptly. He is on our "good guy" list. We have had some VERY bad experiences with plumbers in the past but Mark Williams from Mark One Plumbing is first rate.

Rich D. Scottsdale AZ

5.0
2018-11-28T04:05:06-07:00

Rich D. Scottsdale AZ

This is the third time that we have used Mark's services. He is very professional and fast, and shows up on time. He also returns calls promptly. He is on our "good guy" list. We have had some VERY bad experiences with plumbers in the past but Mark Williams from Mark One Plumbing is first rate.

Absolutely Fantastic Job

Mark Williams has done an absolutely fantastic job; he is a stand out guy. He called me exactly when he said he would, arrived on time and the job was done very well. All in all I have been very impressed. Mark Williams from Mark One Plumbing did a spectacular job, and that anyone using his services will be pleasantly surprised by his work.

Phillip L. Cave Creek AZ

5.0
2018-11-15T15:06:49-07:00

Phillip L. Cave Creek AZ

Mark Williams has done an absolutely fantastic job; he is a stand out guy. He called me exactly when he said he would, arrived on time and the job was done very well. All in all I have been very impressed. Mark Williams from Mark One Plumbing did a spectacular job, and that anyone using his services will be pleasantly surprised by his work.

Solid, Competent Tradesman!

At last, I have found my go to plumber. He is responsive, does high quality work (and guarantees it!), and leaves everything in perfect order. He brings the same dedication and craftsmanship whether the job is big or small. It's rare in this day and age to find such a solid, competent tradesman.

James C. Scottsdale AZ

5.0
2018-11-15T05:10:31-07:00

James C. Scottsdale AZ

At last, I have found my go to plumber. He is responsive, does high quality work (and guarantees it!), and leaves everything in perfect order. He brings the same dedication and craftsmanship whether the job is big or small. It's rare in this day and age to find such a solid, competent tradesman.

Highly recommend!

Mark was to my needs when my water heater decided to start leaking. The model of heater was not available, this would have been easy for anyone else to simply tell me to wait until one came in stock, but Mark went out of his way to find a larger unit of the same make and model and installed that for me. I was up and running with hot water the same day. Mark was clean and tidy and I would highly recommend him to anyone else. Thanks Mark!

Stuart P. Cave Creek AZ

5.0
2019-03-05T15:08:58-07:00

Stuart P. Cave Creek AZ

Mark was to my needs when my water heater decided to start leaking. The model of heater was not available, this would have been easy for anyone else to simply tell me to wait until one came in stock, but Mark went out of his way to find a larger unit of the same make and model and installed that for me. I was up and running with hot water the same day. Mark was clean and tidy and I would highly recommend him to anyone else. Thanks Mark!

Fantastic job!

Mark Williams has done an absolute fantastic job in getting us back online with hot water! Needless to say, it always seems that home nightmares happen during the worst of times. Well we started the morning calling a few plumbers - as well as our home warranty; I then was able to see who was responsive and willing to help out on a Saturday. Fortunately it was my lucky day and Mark was able to come over. Mark is a very stand out guy.  Mark was not the only plumber to come to our home - 4 in total did, one being the home warranty company, but I felt that Mark provided, professionalism and was very meticulousness, as well as more knowledgeable about how the tankless water system would work in our home. So I bit the bullet and asked for him to perform the job. Mark called me exactly when he said he would, arrived on time and the installation was done very well. All in all I have been very impressed and  truly believe that Mark Williams from Mark One Plumbing did a spectacular job, and that anyone using his services will be pleasantly surprised by his work.

Paul H. Scottsdale AZ

5.0
2018-11-25T10:14:55-07:00

Paul H. Scottsdale AZ

Mark Williams has done an absolute fantastic job in getting us back online with hot water! Needless to say, it always seems that home nightmares happen during the worst of times. Well we started the morning calling a few plumbers - as well as our home warranty; I then was able to see who was responsive and willing to help out on a Saturday. Fortunately it was my lucky day and Mark was able to come over. Mark is a very stand out guy.  Mark was not the only plumber to come to our home - 4 in total did, one being the home warranty company, but I felt that Mark provided, professionalism and was very meticulousness, as well as more knowledgeable about how the tankless water system would work in our home. So I bit the bullet and asked for him to perform the job. Mark called me exactly when he said he would, arrived on time and the installation was done very well. All in all I have been very impressed and  truly believe that Mark Williams from Mark One Plumbing did a spectacular job, and that anyone using his services will be pleasantly surprised by his work.

Professional and fast!

I agree with he other reviews. This is the third time that we have used Mark's services. He is "very" professional and fast, and shows up on time. He also returns calls promptly. He is on our "good guy" list. We have had some VERY bad experiences with plumbers in the past but Mark One is first rate.

Carl A. Scottsdale AZ

5.0
2019-03-12T15:17:06-07:00

Carl A. Scottsdale AZ

I agree with he other reviews. This is the third time that we have used Mark's services. He is "very" professional and fast, and shows up on time. He also returns calls promptly. He is on our "good guy" list. We have had some VERY bad experiences with plumbers in the past but Mark One is first rate.

Reasonable pricing for his expertise

Our tenants lost hot water and we received Mark's information by referral from another plumber who could not work with tankless water heaters. He is very knowledgeable, friendly and prompt with more than reasonable pricing for his expertise. We had been told by a previous contractor that the entire unit needed to be replaced- a job that would cost thousands, and Mark was able to get the unit up and running for a very small fraction of that price. He took the time to give us detailed information on the issues so we understood thoroughly which was very helpful since we've lost hot water there on multiple occasions. We'll definitely hang onto his information for future needs.

Haley R. Scottsdale AZ

5.0
2019-01-10T11:06:25-07:00

Haley R. Scottsdale AZ

Our tenants lost hot water and we received Mark's information by referral from another plumber who could not work with tankless water heaters. He is very knowledgeable, friendly and prompt with more than reasonable pricing for his expertise. We had been told by a previous contractor that the entire unit needed to be replaced- a job that would cost thousands, and Mark was able to get the unit up and running for a very small fraction of that price. He took the time to give us detailed information on the issues so we understood thoroughly which was very helpful since we've lost hot water there on multiple occasions. We'll definitely hang onto his information for future needs.

Reasonable pricing for his expertise

Our tenants lost hot water and we received Mark's information by referral from another plumber who could not work with tankless water heaters. He is very knowledgeable, friendly and prompt with more than reasonable pricing for his expertise. We had been told by a previous contractor that the entire unit needed to be replaced- a job that would cost thousands, and Mark was able to get the unit up and running for a very small fraction of that price. He took the time to give us detailed information on the issues so we understood thoroughly which was very helpful since we've lost hot water there on multiple occasions. We'll definitely hang onto his information for future needs.

Hailey R. Scottsdale AZ

5.0
2018-11-25T11:36:04-07:00

Hailey R. Scottsdale AZ

Our tenants lost hot water and we received Mark's information by referral from another plumber who could not work with tankless water heaters. He is very knowledgeable, friendly and prompt with more than reasonable pricing for his expertise. We had been told by a previous contractor that the entire unit needed to be replaced- a job that would cost thousands, and Mark was able to get the unit up and running for a very small fraction of that price. He took the time to give us detailed information on the issues so we understood thoroughly which was very helpful since we've lost hot water there on multiple occasions. We'll definitely hang onto his information for future needs.

Finally, we’ve found a great, responsive plumber!

Mr. Mark Williams is the best! He did the periodic maintenance on our Navien tankless water heater in a thorough manner. He's an authorized installation and service person for many makes of tankless water heaters. Additionally, I asked him to check out the "sewage smell" in our master bath sinks and shower. He did a fantastic job trouble-shooting the problem, cleaning out the pipes and explaining where the odors were coming from. He showed me how to keep those hard to reach areas, such as the sink overflow, clean and odor-free. Mark left our water heater and master bath areas cleaner than he found them! He even wore booties!

Finally, we've found a great, responsive plumber!

Carole E. Phoenix AZ

5.0
2018-10-08T15:39:00-07:00

Carole E. Phoenix AZ

Mr. Mark Williams is the best! He did the periodic maintenance on our Navien tankless water heater in a thorough manner. He's an authorized installation and service person for many makes of tankless water heaters. Additionally, I asked him to check out the "sewage smell" in our master bath sinks and shower. He did a fantastic job trouble-shooting the problem, cleaning out the pipes and explaining where the odors were coming from. He showed me how to keep those hard to reach areas, such as the sink overflow, clean and odor-free. Mark left our water heater and master bath areas cleaner than he found them! He even wore booties! Finally, we've found a great, responsive plumber!

Done correctly first time!

Mark One Plumbing is extremely careful and does the work to make sure it is done correctly first time! Very thorough and would highly recommend his services.

Rod H. Scottsdale AZ

5.0
2018-11-13T09:42:20-07:00

Rod H. Scottsdale AZ

Mark One Plumbing is extremely careful and does the work to make sure it is done correctly first time! Very thorough and would highly recommend his services.

Very Knowledgeable!

Mark provided excellent service, excellent work, and a very clean work site, very knowledgeable!

Jennifer W. Fountain Hills AZ

5.0
2018-11-04T11:45:24-07:00

Jennifer W. Fountain Hills AZ

Mark provided excellent service, excellent work, and a very clean work site, very knowledgeable!

Above and beyond

Mark installed a water heater for us. We had a quote from the company our home warranty company contracts with, but it was extremely high and I didn’t trust them. Mark was quick to respond to phone calls and requests. He was always professional, thoughtful and kind. He was able to take care of the project quickly and went above and beyond what the other company had quoted for a more reasonable price. I would highly recommend him to others a I am happy to report that I now have a plumber I like and trust. Thank you Mark!

Sarah F. Scottsdale AZ

5.0
2019-02-21T13:47:18-07:00

Sarah F. Scottsdale AZ

Mark installed a water heater for us. We had a quote from the company our home warranty company contracts with, but it was extremely high and I didn’t trust them. Mark was quick to respond to phone calls and requests. He was always professional, thoughtful and kind. He was able to take care of the project quickly and went above and beyond what the other company had quoted for a more reasonable price. I would highly recommend him to others a I am happy to report that I now have a plumber I like and trust. Thank you Mark!

Recommend him without hesitation!

I called Mark and he showed up the morning I called. He was polite and professional. He explained all my options -- the pros and cons of repairing versus replacing the unit. He was transparent with all costs and fees and extremely fair. He willingly provided me his point of view from the customer's perspective and did not try to hard sell products/services I didn't need. When we agreed on the scope of work, he ordered the replacement part and came back the same afternoon to replace it. He stayed until about 7PM to make sure the job was completed and done right. I have a wife and two kids and was without hot water for a few days -- my family was extremely happy when Mark left and the hot water heater was working again. I will definitely call Mark One the next time I have any plumbing issues and would recommend him without hesitation. Thanks Mark!

Shannon W. Tempe AZ

5.0
2018-12-09T10:48:39-07:00

Shannon W. Tempe AZ

I called Mark and he showed up the morning I called. He was polite and professional. He explained all my options -- the pros and cons of repairing versus replacing the unit. He was transparent with all costs and fees and extremely fair. He willingly provided me his point of view from the customer's perspective and did not try to hard sell products/services I didn't need. When we agreed on the scope of work, he ordered the replacement part and came back the same afternoon to replace it. He stayed until about 7PM to make sure the job was completed and done right. I have a wife and two kids and was without hot water for a few days -- my family was extremely happy when Mark left and the hot water heater was working again. I will definitely call Mark One the next time I have any plumbing issues and would recommend him without hesitation. Thanks Mark!

Very meticulous worker!

I used Mark One Plumbing to repipe and install two tankless water heaters. The jobs went very well. He is a very meticulous worker and he is very clean and thorough. He knows what he is doing and he gets the job done in a reasonable amount of time. Everything works great. He is very professional; he doesn't come in with his pants hanging down and his crack hanging out. He has an overall general good character and he is honest.

Mary H. Phoenix AZ

5.0
2019-02-14T09:51:16-07:00

Mary H. Phoenix AZ

I used Mark One Plumbing to repipe and install two tankless water heaters. The jobs went very well. He is a very meticulous worker and he is very clean and thorough. He knows what he is doing and he gets the job done in a reasonable amount of time. Everything works great. He is very professional; he doesn't come in with his pants hanging down and his crack hanging out. He has an overall general good character and he is honest.
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