Best Tankless Water Heater Installation in Honolulu HI

They did an excellent job. Also put in new water flow valve. I couldn't be more pleased. I will recommend them to all my friends. They don't overcharge.

Replaced all waste lines for 20 washers. Replaced old galvanized hot and cold water lines 4 20 washers. Did a good job on the plumbing and it should be ready for the next generation. Our downtime was kept to a minimum a job well done..

Excellent job, Kama Hele! So pleased with all the work they did for us today. They went above and beyond to ensure our piping was repaired and not leaking. Highly recommended!

Amazing company amazing service ,however they did not say that it was a two-hour window of the appointment and they would call me before coming. Why they did tell me that day that morning, that day of yhe appointment. Lucky for me it was the first one on the they did a great job very very professional.

I called this place twice within a month & the guy who answered both times was extremely rude & unprofessional, I believe it was mainly because it was after hours! I could barely hear him talk over a young child screaming in the background, & when I tried to inform him about it, he mentioned my comment to a third party in the room, & laughed about it …(he never once even asked what problem I needed help with, if he could help me at all, or where I was located! If you want some expert professional help to a problem you’re experiencing, I’d call ANY OTHER BUSINESS than this one, you’d just be wasting your time!

Requested a quote they never called back to do the job still waiting

Excellent experience! We called several companies for an emergency repair but only Emergency Plumbing could come same day. We had a large leak and Rob worked hard to fix it. He did a great job. Also, he is very knowledgeable and easy to talk to. Overall, I would recommend this company 100%!

Steve's Plumbing did a great job by having someone come out a day earlier than expected, provided me with a quote for the repair and then proceeded to do the repair on the same day. Nalu was very professional and did a great job at replacing the isolation valve and pressure regulator along with some damaged piping and the old water box. He was also very neat and cleaned up everything before he left. I'm very happy with the repair.

Very friendly stafg

After a week of cold showers and plumber appointments that didn't show up of never called back...I found Larry at Tankless Hawaii. Not only did he answer his phone on the first call, he got right back to me in 10 minutes and suggested I try a few things before he came out. I followed his suggestions and walla! my tankless water heater came back to life! This guy is not out for the money, he genuinely wants to solve the problem. HIGHLY RECOMMENDED>

I visited homedepot to replace windows and doors worth over 20k. Every visit I had to wait over 30min for someone to help me. In fact, i called from inside the home Depot to get a sales person. Sales person said that I must pay for the installer to come over the house to measure. Paid $50 deposit and the installer showed up an hour late. No calls for over 2 weeks. Called home Depot for estimate. Received an estimate with inaccurate window counts. Called home Depot to resubmit. No estimate uptodate. Called Home Depot, sales person said that the installer quit. They have to send another installer to come and measure again. No one ever contacted for one month. Called home Depot again and the person said sorry I asked for my deposit back and went elsewhere.

I booked these guys for kitchen faucet and drinking water filter installation and I had all the parts available for them. What can be simpler, right?
The guy showed up right at the end of the given 2-hour window and arrived in poorly maintained and dirty truck which kind of speaks for itself...
Though he promptly started to work but he was a little bit too talkative than you would expect from a professional that come for a particular service and not for to be your buddy. He also spoke on his phone on a non-related matters a few times and I believe that he should have been more focused on getting things done right rather than being interested and asking about my family members and what do I do for a living.
He finished with the faucet in like 30 minutes, billed me for an hour and told me he can't install the water filter because he doesn't have necessary parts and referred me to some third party company.
As I found out later all the parts that have been needed was a single 20 standard braided hose for a few bucks. He didn't have it nor he made any effort to swing by a hardware store and come back to finish the filter installation - no such option was given.
And the best part I discovered after he grabbed my check and left:
First, during the faucet installation he severely twisted both braided connection hoses which is strictly prohibited in the installation instructions (I doubt he even read it...)
And second, he failed to set up my new expensive faucet correctly and adjust the rotation limiter. So now I can pour water not only in my sink but also on my window if I want to!
Now I would rather go and buy some tools and redo all of this myself than deal with that non-professional service ever again.
ABSOLUTELY NOT RECOMMENDED.

I was extremely pleased with Allens Plumbing. They responded Promptly and the technician (Jeremiah Abreu) was able to replace our leaking water heater within one morning. He was skillful, fast and a hard worker. I would recommend them to anyone with a problem.

I requested estimates for a bathroom sink replacement from several companies but decided to go with Diamond Head Plumbing, not because they provided the lowest estimate but more so because they were the most professional and knowledgeable. I had questions about the estimate that was emailed to me, so a couple of technicians were sent to my residence to do an inspection. The office sent me a follow-up estimate that was higher than the first; however, it was consistent with what I discussed with the technicians who did the inspection. On the appointed day, technician Chris Robinson arrived on time wearing a mask and practicing proper social distancing. Chris did an excellent job and took the time to explain what he did. The payment process was also quick and easy. I can’t see Diamond Head from my home, but I called Diamond Head Plumbing anyway and am glad I did!