Are You Making These 5 RV Water Filter Cartridge Mistakes After Storage?
Hey there, fellow road warriors! Justin Boggs here, Sales Director at RV Water Filter Store.
The birds are starting to chirp, the sun is staying up a little longer, and if you’re anything like me, you’re already checking your tire pressure and dreaming of that first campfire of the season. It’s de-winterization time! While most of us are pros at flushing the pink stuff out of the pipes and checking the house batteries, there is one area that often gets overlooked, or worse, handled incorrectly: the water filtration system.
Your rv water filter cartridge is the frontline defense for your health and your RV’s plumbing. But after sitting in a dark storage unit or a cold driveway for months, that system needs more than just a quick rinse. If you treat your filters like an afterthought, you might be inviting some nasty guests (like bacteria and mold) to your first camping trip of the year.
Are you making these common post-storage mistakes? Let’s dive into the five biggest blunders we see every spring and how you can fix them to ensure your water stays clean, clear, and safe.
1. The "It Still Looks Clean" Trap (Reusing Last Year’s Cartridges)
This is the most common mistake we see. You pull your filter canister open, look at the cartridge, and think, "Hey, it’s still white! I only used it for three months last summer. It’s got plenty of life left."
Stop right there.
A used rv water filter cartridge that has been sitting stagnant for months: even if you drained the housing: is a breeding ground for biofilm. Bacteria are microscopic; you won't see them with the naked eye until the problem is so bad that the filter starts smelling like a swamp. Carbon filters, in particular, are designed to trap organic contaminants. When they sit in a damp, dark environment without fresh water flowing through them, those trapped contaminants become food for bacteria.
Even if you "dried it out" on a paper towel before putting it in a plastic bag for the winter, moisture stays trapped deep inside the carbon block or the pleated paper. When you hit it with water again in the spring, you’re essentially pushing a winter's worth of bacterial growth straight into your glass of water.
The Fix: Start every season with a fresh set. It’s the cheapest insurance you can buy for your health. Check out our collection of filter cartridges to find the right fit for your system.
2. Installing New Cartridges Before Flushing the System
You’re excited to get the rig ready, so you pop in a brand-new F1PB carbon filter and then start the de-winterization process. This is a classic "order of operations" error.
If you used RV antifreeze (the pink stuff) to winterize your rig, that liquid is still sitting in your lines and possibly your filter housings. While non-toxic, RV antifreeze is thick and contains chemicals that you don't want your brand-new carbon filter to absorb. Carbon filters are incredibly "sticky" when it comes to chemicals. If you run antifreeze through a new carbon block, you are essentially "using up" a portion of that filter's capacity on the pink stuff instead of the contaminants at the campground.
Furthermore, if you are sanitizing your fresh water tank with a heavy bleach solution (which you should do every spring!), that high concentration of chlorine can be hard on certain types of filter media if it sits in the housing too long.
The Fix:
- Remove all old filters and leave the housings empty (or use a bypass hose).
- Flush the entire system with fresh water until the pink color and smell are completely gone.
- Sanitize your tank and lines.
- Flush the system again to remove the bleach smell.
- Then and only then, install your new rv water filter cartridge.
3. Ignoring the "Gunk" Inside the Filter Housing
When you pull out that old cartridge, take a good look inside the blue or clear housing itself. Is there a slimy film on the walls? Is there some sediment settled at the bottom?
Many RVers simply swap the cartridge and screw the housing back on. But that slime (biofilm) on the housing walls will immediately begin to contaminate your brand-new filter. It’s like putting a clean foot into a dirty sock.
The Fix: Every spring, give your filter housings a spa day. Wash them thoroughly with warm, soapy water and a soft brush. If you see stubborn mold or slime, a mild bleach-water solution can help sanitize the interior of the housing. Make sure to rinse it completely before reassembling.
While you’re at it, inspect the O-rings. If they look flattened, cracked, or dry, it’s time to head over to our parts and fittings section for replacements. A little bit of food-grade silicone grease on the O-ring will go a long way in preventing leaks and making the housing easier to remove next time.
4. Forgetting the Water Softener "Wake-Up Call"
If you travel through the Southwest: Arizona, New Mexico, Southern California: you know that the water there is practically "liquid rock." Hard water can destroy your RV’s plumbing and make your hair feel like straw. Many of our customers use a portable water softener, but these devices need specific care after storage.
If your water softener sat all winter, the resin beads inside could be compacted or, in some cases, have grown bacteria if they weren't stored with a salt brine. A common mistake is just hooking it back up and expecting it to work like new.
The Fix: Your softener needs a "super regeneration" after storage.
- Backwash the unit to loosen the resin bed.
- Perform a full regeneration with the recommended amount of salt.
- If the unit was stored in a way that might have allowed bacterial growth, look into specialized resin cleaners that are safe for potable water systems.
Keeping your softener in top shape ensures that your new sediment cartridges don't get prematurely clogged by scale and mineral buildup. If you haven't added a softener to your kit yet, check out our full range of RV water softeners.
5. Not Checking the "Support Crew" (Regulators and Hoses)
Your rv water filter cartridge can only do its job if the rest of the system is functioning. We often see people bring their RV out of storage, hook up their filters, and then realize they have a leak: not because of the filter, but because their hose or regulator failed over the winter.
Standard rubber hoses can degrade and grow mold inside during storage. Similarly, cheap brass water regulators can seize up or lose their accuracy. If your regulator fails and allows a spike in pressure, it could potentially crack a filter housing or damage your internal plumbing.
The Fix:
- Inspect your drinking water hoses for any "funky" smells or visible black spots (mold). If in doubt, replace it.
- Test your adjustable water regulator. Make sure the gauge is moving freely and that it’s still limiting pressure to a safe 40-50 PSI.
- Check your hose accessories and quick connects for worn-out washers. A $0.50 washer can save you a lot of frustration at the campsite.
The Proactive Solution: Subscribe & Save
We get it: life is busy. Between planning routes, booking campsites, and maintaining the engine, remembering which rv water filter cartridge you need can be a hassle. That’s why we created our Subscribe & Save program.
Instead of realizing you're out of filters the day before your big trip, you can have them delivered right to your door exactly when you need them. Not only does this ensure you always have fresh filters for de-winterizing, but it also saves you money on every order. It’s the ultimate "set it and forget it" for clean water.
Final Thoughts from Justin
At the end of the day, we’re all out there for the same reason: to enjoy the great outdoors and make memories with our families. Nothing ruins a trip faster than someone getting sick from bad water or having to spend your vacation time fixing a flooded basement because of a cracked filter housing.
Taking an extra 30 minutes during your de-winterization process to properly care for your filtration system makes a world of difference. Toss those old filters, scrub those housings, and start the season with the confidence that the water coming out of your tap is as fresh as the mountain air.
If you have any questions about which cartridge is right for your specific setup: whether you're looking for carbon cartridges for taste or specialty cartridges for specific contaminants: don't hesitate to reach out. We’re here to help you find the perfect system for your travel style.
Safe travels, and we’ll see you on the road!
Ready to refresh your system? Visit the RV Water Filter Store today and use our easy search to find the exact cartridges for your rig. Don't forget to check our shipping and return policy for details on how we get your gear to you fast!