Water in an RV Is Not a “Wait and See” Problem

Today, in a friend’s Class C motorhome, water was found where it should not be.

That sentence alone is enough to make my full-time RV brain sit up straight.

Water on the kitchen floor in an RV is never something I casually walk past. It does not matter if breakfast is cooking, friends are waiting, the campground is beautiful, or the day has a plan. When water shows up where it does not belong, the plan changes.

This morning, that is exactly what happened.

Water was found on the kitchen floor, and when water was run into the sink, you could hear it draining inside the cabinetry. That meant we needed to determine whether the issue was on the freshwater side or the drain side. Those are two very different problems, but both can become expensive if ignored.

At the same time, two friends were in the middle of cooking breakfast for the entire group here at North Sterling State Park. Bacon, sausage, eggs, the whole campground morning orchestra was underway.

I said to one of them, “Let someone else cook breakfast. We really need to find out where that water is coming from.”

Not because breakfast wasn’t important.

Because water in an RV is more important.

Someone else can cook bacon. Someone else can scramble eggs. Someone else can keep breakfast moving.

But water damage does not wait politely in the corner until everyone has eaten.

Why Water Gets My Attention Immediately

If you have followed my RV journey for a while, you know I do not play games with water in an RV.

In Bertie Bea alone, I have dealt with three water-related issues in the last six months: a shower drain, a roof leak, and a mysterious wet bay leak.

That is enough to make a person very serious about drips, damp spots, mystery puddles, and anything that sounds like water running where water should not be running.

And before Bertie Bea, there was Bertha.

When I bought Bertha in 2021, I purchased her from a dealer. At that point, I had heard of RV inspections, but I did not truly understand their value. I did not know what I know now. I did not know how expensive hidden water damage could become.

Later, I found floor damage under the dinette caused by a roof leak.

That repair cost me approximately $10,000.

It was done properly, and Bertha ended up with a new RV Armor roof, but that was a very expensive lesson. It also taught me something I have never forgotten:

Water in an RV is not a casual discovery.

It is a stop-what-you-are-doing event.

The Troubleshooting Begins

Once we started looking, the first job was to figure out whether the leak was coming from the freshwater side or the drain side.

Freshwater leaks are one kind of trouble. Those can involve pressurized lines, fittings, valves, pumps, city water connections, or water heaters.

Drain leaks are another kind of trouble. They may only show themselves when water is draining, which can fool people into thinking the problem is less serious.

It is not.

A drain leak can dump dirty water into cabinets, under flooring, into hidden compartments, and anywhere else gravity wants to carry it. By the time you smell it, see swelling, or notice soft flooring, the damage may already have moved in and unpacked its bags.

In this case, when water was run into the kitchen sink, you could hear it draining inside the cabinetry. That pointed us toward the drain side.

The problem was that the fitting was not visible.

And this is where having the right tools matters.

I used my Teslong flexible inspection camera to get eyes into a place where my eyes could not go. That camera let me see the hidden drain connection behind the cabinetry. Without it, we would have been guessing.

Guessing inside an RV is dangerous.

Guessing leads to cutting where you should not cut, pulling on things you should not pull, and making “temporary” repairs that last just long enough to cause a bigger problem.

These photos are not here to embarrass anyone. They are here to show why RV troubleshooting requires tools, judgment, and knowing when a repair needs a qualified service center.

What We Found

What I found was a broken fitting on the kitchen sink drain line.

The solid black drain pipe had a built-in lip where the flexible drain line attached using a threaded clip-style fitting. That lip had broken. Once that lip broke, the threaded fitting no longer had the proper structure to hold onto.

In other words, the drain line no longer had a trustworthy connection.

The likely cause was cold-weather stress. This coach had been used in Colorado in temperatures in the 20s and 30s. Flexible drain lines are flexible until the cold turns them into something closer to a stubborn piece of licorice. If that line got bumped, shifted, pulled, or stressed while cold, it could put pressure on the plastic fitting.

And plastic fittings do not always give a warning speech before they fail.

They just break.

Why I Would Not Attempt a Campground Repair

Once I saw the problem, the next question was obvious:

Can this be fixed here?

My answer was no.

Not safely. Not correctly. Not in a way I would put my name on.

The broken fitting was not easily accessible. There was cabinetry in the way, and there was no clean access panel. To reach the area properly, it looked like one of two things would need to happen.

Either an access hole would need to be cut into the cabinetry, or the propane stove might need to be removed.

Neither one of those is a small decision.

Cutting into cabinetry is not something I am going to do casually on someone else’s RV. You need to know what is behind the panel, where to cut, how much access you need, and how the opening will be finished afterward.

Removing the stove is another matter entirely. Once the stove comes out, now propane fittings may be involved. That means the propane needs to be shut off, lines may be disturbed, fittings need to be reconnected properly, and the system needs to be leak tested.

That is not campground buddy-repair territory.

That is service-center territory.

The Rolling Smooth mindset is not “fix everything no matter what.”

The Rolling Smooth mindset is:

Slow down.
Breathe.
Evaluate.
Determine the cause.
Resolve it or mitigate it.
Do not make it worse.

In this case, the correct move was to stop using water, document what we found, and have the RV service center repair it properly.

The Shop Rate Conversation

When I recommended having the RV service center repair it, I was told, “I don’t like their shop rate of $225 an hour.”

You do not want to know my first thought.

But here is the polished version.

If you are going to own an RV, you either need to be willing to learn how to maintain and repair it, willing to pay someone qualified to repair it, or preferably both.

An RV is not just a camper.

It is a moving earthquake with plumbing, propane, electricity, appliances, sealants, tires, suspension, slides, tanks, vents, drains, and roof penetrations all bouncing down the highway together.

Things are going to break.

Not might.

Will.

That does not mean RV life is bad. It means RV life is mechanical. It means RV ownership comes with responsibility. It means maintenance is not optional, and neither is sound judgment.

A $225 hourly shop rate may feel expensive, and I understand that. Nobody enjoys writing checks for repairs.

But what is more expensive?

A professional repair on a broken drain fitting?

Or water damage inside a cabinet?

Or flooring damage?

Or mold?

Or a propane fitting that was disturbed and not properly tested?

Or a temporary repair that fails halfway through the next trip?

RV service labor feels expensive until you compare it to the cost of guessing.

The Bigger Lesson

The broken drain fitting was the mechanical problem.

The bigger lesson was the decision-making problem.

Water had reportedly been noticed earlier in the week. It should have been investigated immediately.

That is not criticism for the sake of criticism. That is the lesson.

When water appears in an RV, stop and find out why.

Not after breakfast.
Not after the weekend.
Not after the trip.
Not when it becomes convenient.

Immediately.

Because the earlier you find the source, the smaller the story stays.

A towel and a flashlight today can save you from swollen wood, damaged flooring, mold, and a service invoice with teeth later.

My Rolling Smooth Recommendation

My recommendation was simple:

Stop using the sink.
Stop using the water if needed.
Do not attempt a questionable temporary repair.
Do not cut into cabinetry at the campground.
Do not remove the stove and disturb propane lines in the field.
Take it to the RV service center and have it repaired correctly.

That may not be the fun answer.

It may not be the cheap answer.

But it is the answer that keeps a broken drain fitting from becoming a larger and more expensive problem.

Sometimes the best RV repair is knowing when not to repair it yourself.

Sometimes the win is finding the issue, understanding the risk, shutting things down, and handing the job to someone with the access, parts, experience, and responsibility to fix it properly.

That is not quitting.

That is Rolling Smooth.