Sept. 2026: Came down the stairs one day and heard a huge whooshing sound, and I just knew my basement must have inches of water in it! Ran downstairs: nothing! Went outside...a pipe to the sprinkler system had busted because of settling or something over the past 26 years. (Go figure!) Called up A 3 in 1 Irrigation Specialists, and Nathaniel and John came out (on time, right when they said they would), and fixed the broken pipe in short order! I showed him another broken sprinkler head, and he made quick work of that too. Oh, and I needed a new bell thing, and he got me all fixed up on that also. A few weeks later I asked them to come back for 2 reasons: 1: When Rod Martin's Complete Basement Systems installed the sump pump in my subfloor, it shoots water out of a pvc tube up to ground level, then goes underground for about 20 feet before dumping out a vent thing in the yard. But the pvc was the lamest, thinnest kind possible, and going over the buried pipe with the riding lawn mower caused it to crush the pvc pipe down flat (underground, under the grass, but I could see little shards of white plastic here and there.) So Nathaniel and John laid down a new, stronger pipe for me. The 2nd reason they came is because I've been noticing that when it rains, the water does not go down the downspout and into the pvc pipe and away from the house, it just stays there overflowing right up against the foundation of my house. I had a plumber tell me about a year ago that the roots from the fir tree above the pipe had busted through the pipe, and there was nothing he could do without removing the fir tree! All's I wanted him to do was to roto root the pipe, but apparently it was too full of roots to do it, or maybe he figured it also had cracks and holes in it. So I let that go until I decided to let them remove the fir tree, because I thought it had to be removed to lay new pipe. Well, I had Nathaniel take a look, he and John dug to find the end of the pipe, and guess what? It wasn't the fir tree's roots, it was the big maple tree in my front yard! And the pvc was entirely intact! When they built my house, they ran the pvc from the downspout, to under the sidewalk, it went about 18 inches further, and then it just stopped! There was no cap on the end or anything, just good old hard Colorado clay soil. So as the tree grew, its roots found that if it went inside the pvc pipe, it would have lots of water, so that's what it's been doing for the past 20 years. Mix that with the leaves and dust that have come DOWN the downspout and into the pipe, and you have a nice big rope of small and large roots, mixed with lots of mud. So Nathaniel and John added some pipe to bring it further into the yard (additional watering for a very dry spot in my yard!), and put a pop-up drainage thing at the end, so that whenever it rains, the water comes down the downspout, through the pvc, and the pop-up thing lifts up an inch and lets the water out into my yard. The rocks around it help absorb the heavy impact of the water, until the grass grows nice and strong again, then it will fill in around the rock. And NOW those pesky tree roots won't have a way to clog the pipe again! Just look at what 20+ years of roots in a pvc pipe looks like! Like a 15 foot snake! Anyway, Nathaniel and John are my Go To guys now, they went above and beyond at every turn. Once they located all my irrigation boxes (there are 5), and by located, I mean they were covered with bark and dirt across 2 sides of the house, I mentioned that I would get some flags so that we can find them easier next time. Guess what? They quickly grabbed their flags and flagged them for me! And there was a lot of leftover dirt piled up after the new pipe was laid, and Nathaniel asked me where I would like for them to remove the dirt to. I said "Oh, I think I have an idea of where I want to put it (hidden behind one of my bushes), don't worry about it, just leave it and I will take care of it." But they would not leave a job a mess, and they moved all the dirt and mud for me, and of course replaced the sod they had to remove to lay the pipe. So like many others here on Yelp, I had a fantastic experience with both Nathaniel and John. Nathaniel is super great at what he does, and I trust his expertise, and am very happy with all the results. Thanks so much, Nathaniel and John!! :) read more

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This guy is arrogant and doesn't listen. Nathaniel came last year and did blow out my sprinklers. Done. I ask him to come back and scheduled him ONE MONTH in advance to get him complain about my sprinkler set up. I walked him where to find what he needed for him to tell me his equipment wouldn't work. Just complaints. He canceled on me on the spot. Bad business. NEVER use him again. Funny how arrogant can businesses become. read more

Nathaniel was fantastic to work with. Quality work, knowledgeable, communicative and professional. He helped install irrigation and a drip line for our raised beds and were very pleased with how it turned out and how easy it was to schedule and customize the solution for our yard with his help read more

Very responsive and were able to come out the same day. Arrived on time, fixed several things very quickly and even told me how to fix the other problems ourselves. Will definitely use them again. read more

The A3 in 1 Irrigation Team came over and followed through and exceeded on replacing our backflow unit, along with replacing and fixing other components for our irrigation system to get us back online and getting our system going again. They were professional, courteous, and efficient. I would highly recommend! read more

A3 in 1 Irrigation Specialist - Irrigation Near Me - Denver, Colorado

Nathaniel and crew were great! Would hire again. Work was done fast and looked great the took pride in their finished product.

Nathaniel and John were responsive and ready to work -- got it done -- solved problems and did good work. Recommend!

Nathaniel did a great job diagnosing and fixing the issue and even had to eliminate a wasp nest int he process. He was on-time, friendly, and knowledable. read more

Nathaniel was prompt (came the day I called for help) and fixed two problems with my system in just an hour. His rates are reasonable. I'll call him again when something breaks. read more

Great customer service from Nathaniel. Quick response to issue and scheduled appointment. On time and quick to assess resolution to issues with sprinkler system. Respectful, knowledgeable, and delivered results. read more

On time, professional and well priced. He is a great choice for your system. Certainly call again.

Nathaniel came out on short notice and did a great job fixing multiple problems in our sprinkler system.

5 stars! Nathaniel was responsive, professional, knowledgeable, and kind. He took the time to show us how our sprinkler system worked and addressed all our questions. We highly recommend him and would read more

Fast, friendly service. Made an appointment within 2 days of the leak. Had a leak in a sprinkler line and it was fixed within the hour. I highly recommend. read more

The absolute best! Showed up at my house within 2 hours after I called them to help with an irrigation issue. They were friendly, knowledgeable, fixed the issue quickly and with fair prices. Also gave me other recommendations and diagnosed other problems for my awareness. Don't hesitate to contact them! read more

This will be the fifth year that A3 in 1 Irrigation Specialists has tended to our sprinkler system. A3 in 1 Irrigation Specialist is dependably punctual, affordable, easy to communicate with and thorough. Two years ago, Nathaniel the owner noticed and repaired a bend in the supply line from the house that could have been catastrophic if left alone. From the spigot to the sprinkler heads, A3 in 1 Irrigation Specialist is the company to go to for Spring and Fall professional sprinkler installation, repair and blowout winterization care. Call with complete confidence. read more

Read Nathaniel was a great guy who did great work and knew sump pump and underground gutter connections. He showed up exactly on time. He goes above and beyond and knows his business. He was careful around my pvc pipes and immediately found the problem. A quick repair and three way line upgrade. I'd trust him again to do work. read more

A3 in 1 Irrigation Specialist - Irrigation Near Me - Denver, Colorado

Responded the same day- came the following day to repair a broken backflow preventer. Others either didn't respond or couldn't come for 3 weeks! Fixed the issue in 30 minutes so I can water my lawn again! read more

I used A3 to work on my sprinkler system. They did a great job and I will be using them in the future. I have a large yard that requires a good sprinkler company, so I will be using them again. read more

Nathaniel came the same day I called and was able to repair multiple zones in my sprinkler system. Even found an underground tree root that was growing around a pipe, causing the issues. He also repaired a sump pump issue that could've been costly down the road. Prices are more than reasonable! read more

The business responded right away to my request and came the same day to do our sprinkler blowout. We will be hiring them again!

Had a great interaction with Nathaniel and lan to work with him again He was right on time, communicated well and did the job he promised for the fee he quoted. Can't ask for much more. read more

Outside irrigation pipe repair was well done and very professional. Would recommend again.

It was four days before he responded and then told me they couldn't fit me in. Fair enough, but then adds the comment "hope they fix it right." Just think that comment wasn't necessary and also unprofessional. read more

They scheduled me 3 weeks out; I confirmed the appointment and received a text in reply, but the tech was a no-show on the date and time of my appointment. I texted and called for an ETA; no answer from him or from the company when I left a vm. An hour after he was supposed to be here he texted that he was stuck at another job and could he come the next day. All he had to do was communicate in the first place. Horrible experience if you need someone reliable. read more

I had problems starting up my sprinkler system and found A3 in 1 via Yelp. They had great reviews and were responsive to my request so I booked an appointment. Nathaniel just came out this morning and I walked him to the front of the house to show him where the valve is, which is in a garden bed that we just planted with transplants. I noticed he almost stepped on one of them as we were walking over, so I pointed them out and asked him to watch out for them. He got really offended and started throwing an attitude and said he could just leave if I wanted. I agreed with him and told him he should go. It was a really weird interaction and hopefully he was just having a bad day, but I'll definitely not be working with this company again. read more

Needed to winterize the sprinklers a little early this year. Got response within 24 hours, service was quick and great value. Got some recommendations for which sprinklers need to be adjusted, definitely going to use them next season as well. read more

Nathaniel was prompt, did excellent work and was very reasonable with his pricing given the work he had to do. I have already booked him for winterization and will not hesitate to use his company in the future. read more

Nathaniel and his two guys were great! Very efficient and knew exactly what the problem was as soon as I showed them what was happening. They got it repaired and working quickly! All for a very reasonable price. Great job guys! read more

I found through yelp due to good reviews. Had my whole sprinkler system fixed for a house I just bought. A problem popped up he came immediately and fixed it. Very satisfied will continue doing service with this company. Very professional and efficient and reasonable pricing. read more

A3 in 1 Irrigation Specialist - Came immediately to fix it. - Irrigation Near Me - Denver, Colorado

Incredibly rude and unprofessional. When trying to speak to Nathaniel to get an estimate on a job he cut me off and refused to answer questions. All I was trying to do was ask questions and get clarifications on the estimate and scope of work. read more

This was a quick and great repair. I had previously worked with another company who broke my manifold and quoted me a crazy number to fix their mistake. Called and got an estimated cost within 10 minutes that was much more reasonable. Knowledgeable and professional technician who came on a sunday morning to fix my situation before a key trip. I will definitely work with this company again. read more

Since I contacted A3 in 1 Irrigation Specialist based on reading Yelp and Google reviews, I thought I should also leave a review to share how pleased I am with their service. Nathaniel contacted me quickly and arrived as scheduled. He and his crew evaluated our needs, made the recommendation to replace our broken sprinkler valves, and also moved a few of our sprinkler heads which had been placed behind our fence so that the grass was not receiving all of the water. They also looked at our other sprinkler heads and determined they were fine, but they raised them a bit so they'd work better and feed our lawn. After performing the work, Nathaniel and his crew cleaned up. I'm very pleased with the work they performed, and I think our lawn is going to look even better now. I'd recommend and use them again. read more

Jason showed up early and went right to work. The broken line was in the back yard and was an easy repair. Jason repaired it quickly and water was restored to the line. The cost was reasonable at $75. If I need any more sprinkler work I will call JAC's sprinkler again. read more

We had a 2:00 p.m. appointment and at 2:15 I called and learned he was on a job about 35 Mi away . He then asked what the problem was and I reminded him I had sent a detailed text with all that information . He claimed to have read it but knew nothing about the work to be done . So I explained it again and he gave me some prices, which were wildly inaccurate since he didn't seem to understand the nature of the work . I would expect the contractor to call me if he was running late and this contractor definitely did not do that . read more

Nathanial was amazing. We had a busted sprinkler head and a suspected leak. He showed up and had it all fixed within about 30 minutes. I also heard him tell another potential customer something would be a waste of money. Fantastic to see a company not doing unnecessary and costly services. Heads up though - when scheduling, when you send your address and he sends back a date - you are scheduled for that date. I was still shopping rates and was surprised when he showed up this morning. Fortunately, Nathanial was cheaper than the other quote I got and was able to get my yard fixed weeks earlier. The assumption was my fault - but I want to save someone else from making the same mistake I made. read more

Top notch service from Nathaniel of A3in1. We purchased a home in winter only to discovered this spring that the sprinkler system was completely shot. Nathaniel responded timely to our request for estimate and within weeks our new sprinkler was installed. We were always informed on the crews estimated arrival time and they completed the job on time. The crew was respectful and cleaned up after the job. Nathaniel reviewed the control system with us and helped set up the wifi remote mode. We will continue to rely on A3in1 for annual maintenance and any additions to the irrigation system. Happy customer, Kathleen read more

One of our sprinkler heads broke and water started gushing out. Nathaniel and his team were able to come on short notice. Super polite + communicated well. He let me stay with him as he worked and was happy to answer questions as he worked (I don't know anything about sprinklers and wanted to learn a little). Part-way through the repair, he pointed out that this zone's water pressure was low: too many rotary heads had been attached to it already. As such, he proposed we switch these heads to a drip line with misters. That was actually preferred since this was a shrub area and vegetable garden. He completed the work quickly and for a fair price! read more

Nathaniel and his crew at A3 in 1 did an awesome job repairing my sprinkler system! From his initial reply, which was quick and courteous, to his expert diagnosis and thorough explanation of the issue, I could tell immediately that he knows his stuff. He also got his crew out here on extremely short notice, as I had a very tight timeframe to meet my home inspection deadline. The work they did was second to none, and my system is now working great after they repaired a couple of leaks. Flexible, professional, and above all they did the job right - what more could you want? Oh yeah, he was also the lowest price of any quote I received! There's a reason A3 in 1 has so many great reviews on here - I will definitely call on them again next time I have an issue. read more

Charged the sprinkler system and had a leak. Contacted A3in1 and Nathaniel was quick to respond and get me on the schedule. He showed up on time and had the issue diagnosed and fixed in no time. Great communication and customer service. I will be using them again read more