If you’re wondering what to expect from a free in-home water test in Irvine, the good news is that you don’t need to do much at all. In most cases, simply make sure an adult is home, provide easy access to your kitchen sink, and think about any water concerns or questions you’d like answered. At McCowin Water, we perform professional, on-site testing with immediate results, explain everything in plain English, and never use high-pressure sales tactics.

Here’s a question I hear almost every week: “Brian…do I need to do anything before you come?”
I’m Brian McCowin. My family has been helping Orange County homeowners understand their water since 1972. Some people think they need to collect water samples. Others wonder if they should clean the plumbing first. I’ve even had homeowners ask if they should avoid using water the night before. The answer is simple. No.
Think about a home inspection before buying a house. You don’t repaint the walls to hide problems. You want the inspector to see your home exactly as it is. Water testing works the same way. We want to evaluate the water you actually use every day. There’s no special preparation required.
Just a few simple steps that make the appointment easier for everyone.
Do I need to collect a water sample?
No. We’ll take care of everything.
There’s no need to:
- Fill bottles
- Refrigerate water
- Collect samples ahead of time
- Mail anything to a laboratory
We perform testing right at your home using the water coming directly from your plumbing.
Should I avoid using my water before the appointment?
No. Continue using your water normally.
Take showers, wash dishes, make coffee, and run the dishwasher as you normally would. The goal is to evaluate your home’s water under typical everyday conditions.
What should I have ready before the technician arrives?
Preparation is simple.
We recommend:
➤ Make the Kitchen Sink Accessible
- Most testing is performed at the kitchen sink.
- Clearing away dishes or large items helps us work efficiently.
➤ Have an Adult Home
Someone who can:
- Answer questions
- Discuss your concerns
- Review the test results
- Decide whether they’d like to learn about treatment options
There’s no obligation to purchase anything. But having the homeowner present makes the appointment much more helpful.
➤ Think About Your Water Concerns
Before we arrive, consider questions like:
- Does the water taste different?
- Have you noticed white spots on dishes?
- Is your shower glass difficult to clean?
- Does your family drink bottled water?
- Are you interested in whole-home filtration or reverse osmosis?
The more we understand your goals, the more valuable the visit becomes.

What happens during the water test?
The appointment begins with a conversation.
We want to understand:
- Your concerns
- Your household’s water usage
- What you’d like to improve
Then we perform professional on-site testing.
Depending on your home’s needs, we commonly evaluate:
- Water hardness
- Total Dissolved Solids (TDS)
- Chlorine or chloramines
- Other water characteristics relevant to your concerns
Everything is explained as we go.
Will I get the results immediately?
Yes. This is one of the biggest advantages of our process.
We do NOT:
- Send samples to a laboratory
- Make you wait several days
- Email technical reports later
Instead, we provide immediate results during the appointment.
You’ll see the findings. We’ll explain what they mean, and you’ll have plenty of time to ask questions.
Will the appointment turn into a sales presentation?
No. Here’s an insider secret from more than fifty years in the business. Good recommendations don’t require pressure.
At McCowin Water, we believe: Education first. Decision second.
If treatment makes sense, we’ll explain why. If you want time to think about it, that’s perfectly fine. A good recommendation today will still be a good recommendation tomorrow.
Why do different companies recommend different water systems?
Many companies only sell one manufacturer’s equipment. That creates a challenge.
At McCowin Water, we’re like an Auto Mall for water.
We’re not tied to one manufacturer. We carry a broad selection of premium water treatment technologies because every home’s water is different. That flexibility allows us to recommend what’s best for your water and not what’s sitting in our warehouse.
What questions should I ask during my water test?
A professional consultation should encourage questions.
Some great ones include:
- Is my water hard?
- What does my TDS reading mean?
- Is chlorine or chloramine present?
- Would whole-home filtration benefit my home?
- Would reverse osmosis improve our drinking water?
- What maintenance would be required?
There are no bad questions. The appointment is your opportunity to learn about your home’s water.
Simple Preparation Checklist
Before your appointment, take a few minutes to:
| Task | Why It Helps |
|---|---|
| ➤ Make sure an adult is home | Allows us to review the results together |
| ➤ Clear the kitchen sink area | Makes testing easier and faster |
| ➤ Write down your water questions | Helps you get the most from your appointment |
| ➤ Continue using your water normally | Gives us an accurate picture of your everyday water |
| ➤ Relax | We’ll handle the testing and explain everything clearly |
Preparing for your water test should be easy and not stressful.
What is the smartest first step if I’m curious about my water?
The smartest first step is scheduling a professional Free, In-Home Water Test.
Don’t worry about preparing your water. Just prepare your questions, and we’ll take care of the rest.
The McCowin Promise
For more than fifty years, we’ve helped Orange County homeowners understand their water through professional testing, honest advice, and customized recommendations.
“If the system we install doesn’t perform the way we promised… If your water doesn’t taste, feel, or behave the way we said it would… We’ll pull the whole system out. And either replace it or make it right. No fine print. Because your trust is worth more than the sale.”

Schedule Your Free, In-Home Water Test
If you’re wondering what to expect from a free in-home water test in Irvine, we’d love to show you just how simple the process can be.
We perform professional, on-site testing right at your kitchen sink. You’ll receive immediate results, clear explanations, and honest recommendations with absolutely zero sales pressure.
Call us at (949) 569-5736 or Schedule a Free, In-Home Water Test today and discover exactly what’s in your water, without having to prepare anything more than your questions.
CSLB: C-55 #1022717
Do I need to prepare anything before my free in-home water test in Irvine?
Will I receive my water test results immediately?
Will my free water test turn into a sales presentation?
Posted on Google Daniel VuTrustindex verifies that the original source of the review is Google. I want to thank McCowin Water for the excellent service provided. A special recognition goes to Joel A. for his professionalism, friendly demeanor, and positive “can-do” attitude throughout the installation. Joel made the entire process smooth and worry-free, and his approach truly reflects the quality of service McCowin Water stands for.Posted on Google Reza OhadiTrustindex verifies that the original source of the review is Google. Great workPosted on Google Richard HoffpauerTrustindex verifies that the original source of the review is Google. Braulio was thorough, professional, informative, and polite. When he noticed our chlorine level was a little high he asked if he could see our soft water unit. He noted that apparently I had forgotten to turn it back on when we got back from vacation. Problem solved. I hope all of your employees are as efficient and friendly as Braulio. He’s up-and-coming for sure. Don’t let him get away.Posted on Google Maureena KosareffTrustindex verifies that the original source of the review is Google. I am super impressed with the professionalism and work ethic of my water softener installers. They had to do things differently from planned and easily adjusted to the new method and positioning. They kept me well informed and their interaction with eachother was so very professional, informative, and patient.Posted on Google Mark BallardTrustindex verifies that the original source of the review is Google. It was a pleasure working with Brian and his team. The whole experience was the best I’ve had with any company I’ve dealt with. Professional and honest with a warranty from a well established company that will be around for the long term. I’ve worked with companies in the past that weren’t there when I needed them. Thank you again to the whole team Mark BallardPosted on Google Emilie PetrozziTrustindex verifies that the original source of the review is Google. Braulio was very informative, answered all my questions with thoughtfulness, and was very pleasant. Great service!Posted on Google Quinn HawksworthTrustindex verifies that the original source of the review is Google. Chris was exceptional during our first water test and sales experience. Joel our technician was awesome. Everything was done very well. 5 stars all the way around.Posted on Google AdamTrustindex verifies that the original source of the review is Google. Top-notch experience - professional, no hidden fees, communicated clearly and efficiently. Got the job done as promised, no drama.Posted on Google Teresa PTrustindex verifies that the original source of the review is Google. Braulio did a fantastic job installing our reverse osmosis system! Mccowin has always treated us so well since we had them put our first soft water system and drinking water system in our home back in 2010. Thank you