If your RV's faucets are sputtering or the shower pressure feels more like a weak drizzle, don't jump to blaming the water pump just yet. More often than not, the real culprit is a small, easily-clogged filter called the RV water pump strainer. The good news? Cleaning it is a simple, 10-minute fix that any RVer can do to get their water flowing properly again.
Why You Can't Afford to Ignore Your Water Pump Strainer
This little strainer is the unsung hero of your RV's plumbing system. It's a small filter, usually with a clear plastic bowl, that screws directly onto the pump's inlet side. Its entire job is to catch any sediment, debris, or other gunk from your fresh water tank before it can get sucked into the pump mechanism.
When you ignore this simple component, you're setting yourself up for headaches that can quickly derail a trip. A clogged strainer chokes off the water supply, forcing the pump to work much harder than it's designed to.
The Real Cost of a Clogged Strainer
Once that strainer gets packed with debris, you’ll start noticing some frustrating signs. The most common one is poor water pressure. Your shower might feel disappointingly weak, or the kitchen faucet may slow to a trickle, turning a simple task like washing dishes into a real chore.
But the real danger here isn't just low pressure; it's the risk of expensive pump damage. A pump that's constantly straining against a blockage can easily overheat, leading to premature motor failure—and a much bigger repair bill than you were bargaining for.
This constant strain puts a ton of stress on the pump's motor and its internal valves. Over time, that added wear and tear will absolutely shorten the life of your pump, turning what should be a quick maintenance task into a full-blown replacement. An RV water pump strainer cleaning is one of the easiest and most effective things you can do to protect your system. To really get a handle on how it all works, it's worth learning about the different RV water pumps available.
The Perks of a Clean Strainer
Keeping your strainer clean is less about fixing problems and more about maintaining great performance from the start. A clean filter delivers some major benefits:
- Strong, consistent water pressure at every faucet and in the shower.
- Crucial protection for your water pump, stopping debris from causing internal damage.
- A longer pump lifespan, saving you cash on parts and repairs down the road.
Honestly, this simple, 10-minute task provides some of the best bang-for-your-buck when it comes to preventative maintenance on your rig.
Getting Your Gear and Prepping the System
Before you start unscrewing anything in your RV's plumbing, let's get a few basic things ready. Trust me, spending a couple of minutes on prep now will make the whole RV water pump strainer cleaning process much cleaner and faster. The best part? You almost certainly have everything you need already.
To keep things tidy and get the job done right, I've put together a quick checklist. This is exactly what I grab from my own toolbox before tackling this task.
Your Quick Prep Checklist
Everything you need for a smooth, mess-free strainer cleaning experience.
| Item or Action | What It's For | Insider Tip |
|---|---|---|
| Old Towels | Catching the inevitable water drips and spills when you open the strainer. | Lay them directly under the pump before you start. You'll thank me later. |
| Small Bowl | Holding the strainer parts and catching any remaining water from the housing. | A clear bowl is great so you can see if any small o-rings fall out. |
| Soft Brush | Gently scrubbing the delicate mesh screen without tearing it. | An old toothbrush is my go-to. It has the perfect stiffness for the job. |
| Safety First | Depowering the system to prevent electrical hazards or a surprise shower. | This is non-negotiable. Always, always cut the power first. |
With these few items in hand, you’re well on your way. Now, let’s talk about the most important part of the prep work.
Essential Safety Prep Steps
Prepping isn't just about tools; it's about making sure you don't create a bigger problem, like an indoor water park or an electrical issue. These few steps are critical for a safe and surprise-free job.
The single most important safety step is to completely depower the system. A pump that kicks on while you're working is a serious risk. Always disconnect power first.
Here’s exactly what you need to do before you even think about touching the pump:
- Kill the Power: Find the 12-volt master switch in your RV (often called the "salesman switch") and turn it off. For peace of mind, I sometimes pull the specific fuse for the water pump from the main panel, too.
- Shut Off the Water: If you're hooked up to a city water connection, go outside and disconnect the hose from your rig.
- Bleed the Pressure: This is a big one. Open any faucet—the kitchen sink works perfectly. Let it run until the flow turns into a trickle and then stops completely. This depressurizes the lines so water doesn't spray everywhere when you open the strainer housing.
Once the power is off and the water stops flowing, you're all set to find that pump and get to work without any drama.
Finding Your RV's Water Pump and Strainer
For many RVers, the hardest part of an RV water pump strainer cleaning is just locating the pump itself. Manufacturers are masters at tucking them away in odd nooks and crannies to save space. Think of it as a treasure hunt where the prize is fixing your sputtering water flow.
While the exact spot can vary wildly between makes and models, they usually stick to a few common hiding places.
Common Hiding Spots by RV Type
- Travel Trailers & Fifth Wheels: Start by looking behind false panels in your storage bays—that passthrough storage is a prime location. Other common spots are under the master bed, behind a cabinet near the water heater, or tucked away inside a linen closet.
- Motorhomes: I typically find these behind a screwed-in panel inside a kitchen or bathroom cabinet. You might also find it stashed in a utility bay, usually not far from the fresh water tank.
Pro Tip: The absolute easiest way to find your water pump is to just listen. Turn your pump's power switch on, then open a faucet to make the pump kick on. That distinct humming or buzzing sound will lead you right to it.
Once you’ve tracked down the pump, you’ve also found the strainer. It's almost always screwed directly onto the pump's inlet side, which is the hose coming from your fresh water tank. You can’t miss it—it's a small plastic housing, usually clear or white, attached right to the pump body.
If you're a visual person, looking at an RV plumbing system diagram can really help connect the dots on how everything fits together.
Step-by-Step Guide to Cleaning Your RV Water Pump Strainer
Alright, you've found the strainer. Now for the hands-on part. This is the core of the RV water pump strainer cleaning process, and it’s a quick and easy job. If you take your time, you'll have a clean, leak-free system in about ten minutes.
With your towels laid out under the pump, get a good grip on the clear or white plastic bowl of the strainer housing. It should only be hand-tight, so a firm twist counter-clockwise ought to do it. If it’s stuck, don’t reach for a wrench, as that can crack the plastic. Instead, use a rubber jar opener or a strap wrench for extra grip without applying too much force.
Taking It Apart and What to Look For
As you unscrew the bowl, a little bit of water will spill out—that's what the towels are for. Inside, you'll find the stainless-steel mesh screen. Carefully pull it straight out of the housing.
Now comes a critical step many people skip: a thorough inspection.
- Mesh Screen: Check it for any rips, holes, or warping. If damaged, it can’t do its job and will let debris flow right into your pump.
- Strainer Bowl: Hold it up to the light and look for any hairline cracks, paying close attention to the threads. This kind of damage is a classic sign of freeze damage from winter.
- O-Ring: This little rubber ring sits in a groove where the bowl meets the main housing. Gently pry it out and inspect it for cracks, flat spots, or dryness. A bad O-ring is the #1 cause of leaks after you put everything back together.
If any of these parts are damaged, replace the strainer. It's an inexpensive part that will save you future headaches.
Cleaning and Putting It All Back Together
Take an old toothbrush and gently scrub the mesh screen under cool running water. You want to get all the sediment off without bending the mesh. Clean the inside of the strainer bowl and wipe down the threads on the housing.
Before reassembly, ensure that rubber O-ring is seated perfectly back in its groove. A tiny dab of plumber's grease or even just a little water can help it sit right and create a better seal.
Crucial Tip: Do not over-tighten the strainer bowl when you put it back on. This can easily crack the plastic or pinch the O-ring, creating an air leak that keeps the pump from priming. Always tighten by hand until it’s just snug—no more.
Carefully slide the clean mesh screen back in, then screw the bowl back on by hand only. As you finish, give all your connections a once-over. Knowing how to use different fittings, like 3/4 quick connect fittings, can prevent future leaks. Once it feels snug, you’re done.
Troubleshooting Leaks and Lingering Water Pressure Issues
Okay, you've cleaned out your RV water pump strainer, put it back together, and flipped the switch. But something's not right. Maybe you see a frustrating drip, or worse, the water pressure is just as weak as it was before. Don't worry—these are usually simple fixes.
The most common culprit after reassembly is a small leak from the strainer housing. Before you do anything else, check the O-ring. It’s incredibly easy to pinch it, twist it, or just not get it seated perfectly back in its groove, which is all it takes to break the seal. Kill the power, relieve the pressure, and unscrew the bowl. Carefully inspect that O-ring. Is it clean, free of damage, and sitting just right?
When Cleaning Isn't Enough
If you've stopped the leaks but your faucet is still sputtering, you’re most likely dealing with an air leak. The pump is sucking in air instead of just water, which messes with its ability to prime correctly. Double-check that the strainer housing is snug—hand-tight is plenty—and that the hose connections on both sides of the pump are secure.
Still having problems? A guide on how to fix low water pressure can offer more ideas. If low pressure is a constant battle no matter what, you might want to read our article on choosing the best RV water pressure regulator to safeguard your entire plumbing system.
The most important thing to look for is damage. A strainer with even a hairline crack will never seal properly and will always introduce air into the system, killing your water pressure.
It all comes back to the simple process of taking it apart, cleaning it, and putting it back together correctly.
If you’ve gone through these steps and the problem won't quit, it might be time to replace the part. It's a cheap and easy fix. Keep an eye out for these tell-tale signs:
- Visible cracks in the bowl: Freeze damage from winterization is a common cause.
- A torn or damaged mesh screen: If it’s not filtering, it’s not doing its job.
- Stripped threads: If you can't get the bowl to tighten down securely, it’s done for.
Answering Your Top RV Water Pump Questions
After years of working on my own rigs and talking with fellow RVers, I’ve heard just about every question there is when it comes to water pumps. To save you some time and guesswork on the road, I've rounded up the most common ones I get asked.
How Often Should I Clean My RV Water Pump Strainer?
I always tell people to make an RV water pump strainer cleaning a part of their regular seasonal routine. At the very least, clean it out when you de-winterize your rig in the spring and again before you winterize it for the fall.
If you’re a full-timer or frequently fill your fresh water tank from various sources (especially well water), checking it more often is a smart move. A quick inspection every two or three months can catch gunk before it builds up and puts extra strain on your pump's motor.
Can a Clogged Strainer Make My Pump Run Constantly?
No, a clogged strainer almost never causes the pump to run nonstop. If your pump won't shut off, you're almost certainly dealing with a pressure leak somewhere in your plumbing.
A clogged strainer restricts water flow, causing sputtering and low pressure. The pump can still build enough pressure to shut itself off. A pump that runs continuously is "hunting" for pressure it can't build because it's leaking out somewhere.
Start your search for the real culprit by checking these common spots:
- A dripping faucet or showerhead
- A loose PEX pipe fitting (check under sinks and behind panels)
- A slow leak at the toilet valve
- An internal failure inside the pump's own check valve
My Strainer Housing Is Cracked. What Should I Do?
If you see a crack in the strainer housing, you need to replace it. Period. Even a tiny hairline crack is a major issue because it will suck air into the water lines. When that happens, your pump can't prime properly, and you'll get weak, sputtering water flow or no water at all.
I’ve seen people try to patch a cracked strainer bowl with glue or epoxy. Trust me, it never holds. These temporary "fixes" can't handle the vibration and pressure changes in the system and will fail, leaving you right back where you started.
The good news is that replacement strainers are cheap and easy to find. It’s a simple screw-on part that will immediately fix the air leak and get your water system back to normal.
Is It Better to Have a Clear or a White Strainer Housing?
Both the clear and the solid white strainer housings do the exact same job of filtering out debris. They are functionally identical. From a practical standpoint, though, I always recommend the clear ones.
The advantage is simple: a clear housing lets you see what’s going on inside without taking anything apart. A quick peek with a flashlight tells you instantly if the screen is clean or if sediment is starting to collect. If you ever have to replace your strainer, do yourself a favor and get a clear one. It’s a small upgrade that makes maintenance so much easier.
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