AB/JDD Plumbing Heating & Air Conditioning
Company Overview
Our hours are Monday through Friday, 7:00 AM to 4:00 PM. Overtime services start at 4:00 PM. Emergency plumbing services are available on weekends. Our plumbing services include fixing running toilets, repairing leaking faucets, replacing garbage disposals, and handling main water line repairs or replacements. We handle copper re-pipes, gas/electric water heater installations, tankless water heaters, and boiler repairs. We are equipped to clear drain line stoppages and conduct drain line inspections. Our team installs and repairs heating and cooling systems, covering electric and gas furnaces and wall heaters. Jack Diangson, the owner, acquired the business in 1993 from a previous owner who had run it for over two decades. AB/JDD is a family-run business located in San Jose, catering to the local area. All our work is guaranteed, and we offer competitive pricing. We serve both residential and commercial clients.
Business Services
- Bathtub repair
- Drain installation
- Drain repair
- Faucet installation
- Faucet repair
- Garbage disposal repair
- Gas line installation
- Gas line repair
- HVAC system repair
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Shower repair
- Sink installation
- Sink repair
- Toilet installation
- Toilet repair
- Water heater installation
- Water heater repair
- Water pipe installation
- Water pipe repair
Business Location & Hours
Mon: | 8:00 AM - 4:30 PM |
Tue: | 8:00 AM - 4:30 PM |
Wed: | 8:00 AM - 4:30 PM |
Thu: | 8:00 AM - 4:30 PM |
Fri: | 8:00 AM - 4:30 PM |
Sat: | 8:00 AM - 4:30 PM |
Sun: | 8:00 AM - 4:30 PM |
Recommended Customer Reviews

I had a unique sewer problem in the east foothills. My sewer line crosses 2 other properties besides mine before it reaches the street below. it was totally blocked and jack coordinated with the county to choose the best location for a cleanout on the property of my neighbor. The county sanitation representative told me Jack was very familiar with the East Foothill area. The cleanout was installed and the problem fixed. the price was very fair. I was on the lookout for additional charges and there were not any.

I called AB/JDD to snake my sewage line, because it was a little clogged. This review is not about how well they snaked my sewage line, because any sewage company can do that, but it's about the way they try to overcharge you by tacking on miscellaneous charges at the end without telling you upfront.
When I called, Liz the receptionist said I'd be charged $90/hour for labor plus $20 for machine time. She said there were no other charges. The plumber came out and spent precisely 1.5 hours on snaking the sewage line. He then said he'd have to charge me for the time it took him to drive out there, and I said that Liz didn't mention anything about charging me for driving time. He called the office and said OK that he wouldn't charge me for driving. When he handed me the invoice, however, he charged me for 2 hours, not the 1.5 hours of labor he did. He said the extra 0.5 hours was for writing the invoice. I said I didn't expect to pay for the time he spent writing an invoice, and, furthermore, I thought 30 minutes was a long time to be writing an invoice. I subsequently called the office and Liz said that 30 minutes is reasonable and because she didn't charge me for driving time, it was fair. Note that in my original phone call with Liz, she mentioned neither driving time charge nor invoice time charge.
So my main complaint about this company is that they try to sneak in charges, and they charge an unreasonable amount of time (30 minutes) for invoicing. I find them to lack integrity. I had been recommended to AB/JDD by a neighbor, but that was years ago and my neighbor recommended AB/JDD primarily because she liked working with Mary, the then wife of the owner. The owner and wife have subsquently divorced so that seems to have left the company without much to recommend.

Late on an incredibly hot Sunday, my a/c decided to stop working. I called at least half a dozen places that advertise being available seven days a week. Some place never called me back or couldn't come out, one place was just rude, but Jack took the time to advise me on a few easy things I could look for so I could fix it myself without having to pay him to come out. When I found it was still not working, he came out the next afternoon, squeezing me in between appointments, and happily fixed the problem and showed me what to look for next time. He was pleasant to work with and so was Liz. Thanks for making this painless! I will definitely use you guys going forward.

Used AB JDD Plumbing for a large job to repair a connection with the city sewer line. The entire process was flawless. Job completed ahead of schedule with no problems. Great communication. Highly recommended!!!
Thank you!
Ken A.

We used AB/JDD plumbing to install a new furnace which was recommended by ab/jdd in our rental house about a year ago. We were assured that this unit will last for a long time (at lease10-15 years). Right after one year after the warranty period was over the unit failed. I called the company for help and first I was told they will service the unit the next day with a service charge but then later on the day I was told they won't be able to service it for two weeks from the day I called them. In the winter this was not acceptable and I had to look for someone else to fix the unit. I will not recommend this company as their work and service is not at all reliable.

Unlike products, its much harder to figure out when you are getting value for services you pay for. When you do find someone that you feel really did a good job and charged you fairly, it feels really good. Our experience with Jason at AB/JDD was just that. About one month ago, I had another plumber come out and look at the slow flow in the shower who said we needed a new valve. Then we looked up AB/JDD on Yelp. Jason came by to look at our showers and install a new faucet in the sink. Jason looked at the showers for 2 minutes, did not even need to open it. Said we needed a new shower head. I had one handy and he was right. No charge for that! Thats the value of experience. Then he installed our new faucet. Took a little longer than he had anticipated but he did not try to hurry and gave us his full attention. I liked that -- when he is working for you he is only working for you. He isn't trying to rush to the next job. He was on time for my appt, but if they are ever late, I will try and remember this. The whole job still got done within the hour as was promised. Cleaned up the work area before he left. Overall, experienced, competent, and takes the time to make it right the first time.

When I worked as a Building Inspector I looked at this companies work quite frequently. It was clean, code compliant and thorough. This company takes pride in their workmanship and that is why it is consistently exceptional.

This is the 2nd time I have used AB/JDD and they will be my first contact, EVERY TIME! The first time they helped me was to cover a home warranty issue which was handled without an issue. This time I needed a new water heater. Not only were they my first quote but they were also the cheapest. I called about 10 other shops and AB/JDD got me the LOWEST price for a larger water heater.
Everyone I was in contact with was helpful, friendly and knowledgeable. I had the work done within hours of the water heater breaking (yay for hot showers). With their help, I was able to get a rebate from PG&E (saving me more money). The techs swept the water heater closet and had it looking the best it has looked in years! Thank you for top notch customer service.

I can highly recommend AB/JDD Plumbing. Suddenly at 11:00 PM in the evening, my master bathroom toilet started backing up without stop, flooding the bathroom floor which thankfully was a step down from the master bedroom. Jack came within 15 minutes at 11:30 PM & stayed until almost 2:30 AM. He quickly opened up the sewer line beneath my home, & arranged for a decontamination service to come over at 1:30 am to clean up the mess in the bathroom and under the house. Because he was unable to use the snake to fix the problem, he came the next day with the heavy equipment needed, & after filming the reason for the blockage, his crew worked diligently to tear out the tree roots, and put in a new clean-out. He also went under the house to replace the affected ducts.
Jack & his crew were completely professional and more importantly, very quick to solve this disaster. Of even more importance, I did my homework & found out that their charges were lower than that of other plumbers. They were so honest & fair & really knew what they were doing. Without Jack's fast response, I would have had to demolition the entire bathroom, but even the sub-floor did not suffer any damage. I feel very lucky that I contacted him & have his phone number next to the phone just in case.
Kaaren Powers

They do an excellent job with small plumbing issues. But for any large project they are not the company.
They did my copper pipping about five years ago. Today I'm in the middle of a remodel job and to my surprise a couple of the pipes that were to be replace were never changed out. They are outstanding in the plumbing business they respond in a timely matter and get the job done. But if you have a large project beware.