An RV water softener keeps campground hard water from scaling your water heater, fixtures and shower. This collection has the SoftPro Portable RV Water Softener and a cleanable spin-down sediment separator for RVers, campers and boaters. Choosing tip: size the softener by how many people travel, then add the separator if you hook up to sandy well water.
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Portable RV Water Softener by SoftPro (Lifetime Warranty)
Regular price From $267Regular price$364.50Sale price From $267Sale -
PROTECT YOUR RV : Keep Sediment Out Of Softener, Fixtures, & Holding Tanks! - Add Cleanable Spin-Down Sediment Separator
Regular price $95Regular price$120.50Sale price $95Sale
RV Water Softener Guide: Why Every Campground Hookup Is a Gamble
Key Takeaways
- EPA classes a campground's water supply as a transient non-community water system, one of more than 148,000 public water systems in the US, so the water changes every time you change sites.
- USGS classes water above 180 mg/L (as calcium carbonate) as very hard, and hard water is most common in the east-central and western United States.
- Estimate gallons between recharges by dividing grain capacity by hardness in grains per gallon: 16,000 grains at 10 gpg is about 1,600 gallons, before real-world losses.
- The SoftPro Portable RV Water Softener comes in 8,000-grain and 16,000-grain sizes, connects with standard garden-hose fittings, uses no electricity and recharges with plain table salt.
- A softener doesn't stop sand or grit. A spin-down separator with a reusable 60-mesh screen, installed ahead of the softener, catches that sediment first.
- NDSU Extension reports that softening adds about 8 mg/L of sodium for every grain of hardness removed, which matters if you're on a sodium-restricted diet.
What does an RV water softener actually do?
An RV water softener is a portable ion-exchange tank that sits between the campground spigot and your RV's city water inlet. Resin beads inside trade the calcium and magnesium in hard water for sodium, so the water reaching your plumbing, water heater and fixtures is soft wherever you park.
It's the same chemistry as a home softener, shrunk to travel size. The difference: a portable unit has no control valve to program and no power cord. When the resin beads fill up with hardness minerals, you recharge them by hand with a salt brine, flush the tank and get back on the road.
On the road, you don't control the water. EPA counts more than 148,000 public water systems in the US and puts campgrounds in their own category, the transient non-community system. One park may pull from a soft surface supply. The next may run on a hard well. USGS explains that water picks up hardness "as water moves through soil and rock," and that hard water is prevalent in the east-central and western states, exactly where many snowbird and national-park routes run.
Do you need a water softener for your RV?
You need an RV water softener if the water at your usual stops tests hard or you already see the signs: white crust on faucets and shower heads, spotty dishes, soap that won't lather and scale in the water heater. If you camp mostly where the water tests soft, you can skip it.
Hardness test strips read the water in seconds, and the same strips later tell you when to recharge. USGS publishes its scale in mg/L as calcium carbonate, and softener sizing uses grains per gallon (gpg). NDSU Extension gives the conversion: 1 gpg equals 17 mg/L.
| USGS class | mg/L as calcium carbonate | About gpg (÷17) | What it means on the road |
|---|---|---|---|
| Soft | 0–60 | 0–3.5 | A softener adds little. A sediment separator may still help. |
| Moderately hard | 61–120 | 3.6–7 | Spots and slow scale. A softener is worth it if you stay often or long. |
| Hard | 121–180 | 7.1–10.6 | Visible crust on fixtures and in the water heater. Softener recommended. |
| Very hard | More than 180 | Above 10.6 | Fast scale buildup, and the resin fills up faster. Softener plus a tighter recharge schedule. |
Scale is the cost you don't see. USGS notes that "when hard water is heated, such as in a home water heater, solid deposits of calcium carbonate can form," and that long-term flow through a pipe causes scale buildup. In an RV, that's a small water heater tank, short plumbing runs and fixtures that cost real money to replace.
Softener, sediment separator or filter: which problem are you solving?
Match the equipment to the symptom. Spots, crust and poor lather mean hardness, which is a softener's job. Sand or grit in faucet screens and toilet valves means sediment, which needs a separator. Taste and odor complaints call for a drinking-water filter. Many campground hookups need two of these working in line together.
Mix them up and you pay for gear that leaves the real problem in place. Sort out what you're seeing first:
| What you see | Likely cause | Right tool | In this collection |
|---|---|---|---|
| White crust on fixtures, spotty dishes, soap won't lather | Hardness (calcium and magnesium) | Portable water softener | ✓ SoftPro Portable RV Water Softener |
| Sand or grit in aerators, screens or the toilet valve | Sediment in the supply | Spin-down sediment separator | ✓ RV Spin-Down Sediment Separator |
| Both crust and grit, common at well-fed parks | Hardness plus sediment | Separator first, then softener | ✓ Both products |
| Chlorine taste or odd odor in drinking water | Taste and odor compounds | Drinking-water filter | ✗ Not a softener's job |
| Orange stains or a rotten-egg smell | Iron or hydrogen sulfide | Test first, then targeted treatment | ✗ See "when it isn't the right fix" |
Here's how the three tools compare factor by factor:
| Factor | Portable softener | Spin-down separator | Drinking-water filter |
|---|---|---|---|
| Targets | Hardness minerals | Sand, grit, larger sediment | Taste and odor (varies by filter) |
| Won't handle | Sand, taste, odor | Dissolved hardness | Hardness |
| Power needed | None | None | Usually none |
| Upkeep | Recharge with table salt | Flush the sump, rinse the screen | Replace cartridges |
| Position in line | After the separator | First, after the spigot | Last, or at the kitchen tap |
What size RV water softener do you need?
Pick your RV water softener size by who's on board and how hard the water is. SoftPro lists the 8,000-grain model for one person part time and the 16,000-grain model for two people part time. Larger capacity means more gallons between recharges, so very hard water or longer stays favor the 16,000.
Grain capacity is the amount of hardness the resin can hold before it needs a recharge. Divide it by your water's hardness in gpg and you get a rough ceiling on gallons between recharges. Real output runs lower. Resin is never perfectly efficient, and hardness swings between campgrounds. Treat the numbers below as a planning tool, not a promise, and let your test strips make the final call.
| Campground water | 8,000-grain model (theoretical max) | 16,000-grain model (theoretical max) |
|---|---|---|
| 5 gpg (85 mg/L, moderately hard) | About 1,600 gallons | About 3,200 gallons |
| 10 gpg (170 mg/L, hard) | About 800 gallons | About 1,600 gallons |
| 15 gpg (255 mg/L, very hard) | About 530 gallons | About 1,070 gallons |
| 20 gpg (340 mg/L, very hard) | About 400 gallons | About 800 gallons |
Rule of thumb: if you're solo and stay at parks with moderate hardness, the 8,000-grain model fits. Choose the 16,000 if there are two of you, if you run very hard water or if you'd rather recharge less often.
SoftPro Portable RV Water Softener
How should you hook up an RV softener and sediment separator?
Run the water in this order: campground spigot, sediment separator, softener, then a hose to your RV's city water inlet. The separator goes first so sand never reaches the softener's resin bed. Flush the softener before first use, then turn the water on slowly so the tank fills without a pressure surge.
The SoftPro softener ships ready to connect. The kit includes the softener tank, a cap with handles and two hose quick connections, so the spigot hose goes to the inlet and a second hose runs from the outlet to the rig. If you already use a pressure regulator, keep it at the spigot as you normally would.
The spin-down separator is built for this job. Its housing is high-impact, non-corrosive molded plastic with 3/4" connections. A reusable 60-mesh polyester screen blocks sand and grit, heavier particles settle into a clear sump you can check at a glance, and a 1/2" MIPT drain cleanout with cap lets you flush them out. When the sump looks full, open the drain to flush and rinse the screen. You never have to track down replacement cartridges on the road.
How do you regenerate a portable RV water softener?
To regenerate an RV water softener, shut off the water, disconnect the outlet hose, drain the tank, add plain table salt, then rinse slowly so the brine strips hardness off the resin. Finish with a fast rinse until the water no longer tastes salty, and confirm with a hardness test strip before reconnecting.
Step by step, the SoftPro method looks like this:
- Shut off and disconnect. Turn off the supply and remove the outlet hose.
- Drain. Tilt or invert the unit to empty it, then remove the top plug.
- Add salt. Pour in the amount of table salt the product page lists for your size.
- Slow rinse. Reconnect the supply and run water slowly through the tank for the time listed for your size. This is when the brine does the work.
- Fast rinse. Open the flow up and flush until the water no longer tastes salty.
- Test and reconnect. Check the output with a hardness strip, then reconnect to the RV.
When should you recharge? Don't go by the calendar. Go by the strips. Test the softener's output every few days, and more often at very hard sites. When hardness starts coming through, it's time.
How to choose an RV water softener: what to look for
A good RV water softener matches your hardness and headcount, connects with standard garden-hose fittings, runs without power and recharges with salt you can buy anywhere. Beyond that, look for a sturdy, easy-to-carry tank, a clear warranty and simple upkeep you'll actually keep up with on the road.
- Capacity that fits your crew: SoftPro lists the 8,000-grain size for one person part time and the 16,000-grain size for two people part time.
- Standard hose connections included, so there's nothing to adapt at the pedestal.
- No electricity required, so it works at dry sites and on generator days.
- Table-salt regeneration instead of specialty pellets.
- A warranty in writing: SoftPro's portable softener carries a limited lifetime warranty on both the tank and the valve.
- Sediment protection: a cleanable separator ahead of the softener protects the resin.
- Test strips on hand to check campground water and know when to recharge.
When isn't an RV water softener the right fix?
An RV water softener only treats hardness. It won't fix taste or odor, it isn't a disinfection system and it won't filter sand on its own. Iron stains or a rotten-egg smell need testing first. If you're on a sodium-restricted diet, plan another source of drinking water before you soften everything.
- Taste, chlorine or odor: those call for a drinking-water filter. If you want treated drinking water at a sink, compare reverse osmosis systems.
- Iron or sulfur: NDSU Extension warns that excess iron or hydrogen sulfide can reduce a softener's effectiveness. Test the water, then look at iron filters for a home well.
- Bacteria or other health concerns: a softener doesn't address these. Use a certified lab test and talk to a water professional.
- Sodium: NDSU Extension estimates about 8 mg/L of sodium is added for each grain of hardness removed. If your doctor has you limiting sodium, ask about your drinking water.
- Soft water already: if your strips read soft at the places you camp, put your money into the sediment separator instead.
- A house, not a rig: a portable tank isn't sized for a home. See whole-house water softeners.
Not sure what your water needs?
Get a free water analysis and sizing report. It shows what's in your local water and which system fits your household, whether that's your home base or your rig. Talk to a real water expert at 866-278-4130, Mon–Fri 9am–7pm CST. Orders ship within 1–3 business days.
How we built this guide: Hardness classes come from the U.S. Geological Survey (USGS). The grains-per-gallon conversion, the sodium estimate and the iron and hydrogen sulfide caution come from North Dakota State University (NDSU) Extension. The campground water system definition and the public water system count come from the U.S. Environmental Protection Agency (EPA). Product details come from Quality Water Treatment's own product specifications. The capacity table is simple arithmetic (grains ÷ gpg) and shows theoretical maximums, not tested results.
RV Water Softener: FAQ
Do I need a water softener for my RV?
You need one if the water you hook up to is hard, and at many campgrounds it is. Crusty fixtures, spotty dishes, poor lather and scale in the water heater are the usual signs. A hardness test strip at the spigot tells you for sure in seconds.
How does a portable RV water softener work?
It uses ion exchange, the same process as a home softener. Resin beads in the tank trade calcium and magnesium for sodium as water flows through. When the beads are full of hardness minerals, a salt brine recharges them.
How often should you regenerate an RV water softener?
Regenerate when a hardness test strip shows hardness coming through the softener's output, not on a fixed schedule. Harder water and more people use up capacity faster. Dividing the grain capacity by your water's hardness in gpg gives a rough upper limit on gallons between recharges.
How do you recharge an RV water softener?
Shut off the water, disconnect the outlet hose, drain the tank and add table salt in the amount listed for your size. Rinse slowly so the brine works through the resin, then fast-rinse until the water no longer tastes salty. Confirm with a test strip before reconnecting.
What kind of salt goes in an RV water softener?
The SoftPro portable softener recharges with plain table salt. It dissolves quickly and rinses out cleanly, and you can buy it almost anywhere. Follow the amount on the product page for your size.
Should a sediment filter go before or after an RV water softener?
Before. Put the sediment separator first after the spigot so sand and grit are caught before they reach the softener's resin, your fixtures and your holding tanks. The softener comes next, then the hose to your RV.
Does an RV water softener need electricity?
No. The SoftPro portable softener runs on water pressure alone and needs no power cord. You recharge it by hand, so there's no control valve to program.
What size RV water softener do I need?
SoftPro lists the 8,000-grain model for one person part time and the 16,000-grain model for two people part time. Very hard water or longer stays favor the larger size, because it runs more gallons between recharges. If you're between sizes, call 866-278-4130 and a water expert will help you choose.
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