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RV Greywater (All the things it’s worthwhile to know)

Do you know that RV greywater programs are a factor? That’s proper, each cell properties and RVs could make use of greywater programs!

On this article, we cowl all the pieces it’s worthwhile to find out about RV greywater. From what it’s to learn how to get rid of it. We even spotlight the very best three moveable storage tanks we might discover!

Let’s discover all the pieces it’s worthwhile to find out about RV greywater with out getting our palms soiled.


We put numerous work into designing, researching, writing, modifying, and reviewing these articles. Please think about supporting us by making a purchase order from one of many affiliate hyperlinks included on this put up.

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What Is RV Gray Water?

Should you personal an RV, you recognize that there are sometimes two tanks. One tank is for black water and the opposite for greywater. RV greywater is the water collected from the sink and bathe of your RV.

RV greywater comprises cleaning soap, skincare merchandise, grime, and infrequently meals waste. Mainly, something that goes down your sink or bathe drain.

Nonetheless, not all wastewater is greywater. RV wastewater can both be black water or greywater.

Gray Water Vs. Black Water -What Is The Distinction?

Someone emptying their RV greywater tanks into a dumpsite.
Somebody emptying their RV tanks right into a dumpsite.
Supply: getawaycouple

The distinction between greywater and black water is what the wastewater comprises. Blackwater is waste out of your bathroom and comprises feces and urine. Greywater is out of your sink and bathe, making it cleaner than black water.

Why Seperate Them Into Two Tanks?

Your black water tank is linked to your RV bathroom and your greywater tank to your sink and bathe.

Most RV’s separate the 2, particularly newer fashions, as a result of greywater is less complicated to deal with and reuse. As well as, separating the greywater from the black water signifies that there’s much less water that’s closely polluted.

However there’s additionally a extra sensible motive – it means that you can empty them individually (all the time empty the black water tank first. This helps maintain the waste dumping pipes clear and prevents the build-up of solids.

Moreover, it’s simpler to get rid of greywater than black water. This implies which you can get rid of your greywater whereas on tenting journeys. This prevents your greywater tank from flooding as most wastewater from an RV is greywater.

Should you’d prefer to be taught extra about greywater, you’ll be able to learn our article that explains all the pieces you’ll have to know.

*You must all the time consult with your RV’s consumer handbook to test which plumbing fixtures drain to which tank. For instance, some RV fashions let the bathe drain into the blackwater tank, and others the sink.

It’s vital to test this so that you simply perceive how shortly your waste tanks will refill.

How Usually Ought to I Empty My RV Gray Water Tank?

A man emptying his RV greywater tank.
Supply: familyhandyman

You must empty your RV gray water tank when it’s about 2/3 full.

The frequency with which you empty your tank will depend upon:

  • How giant your tank is.
  • Your water utilization.

Tank Measurement

RVs have totally different tank sizes.

Class A RVs have a tank measurement between 40 – 65 gallons, whereas the tank measurement of journey trailers is 25 – 45 gallons.

To place this into perspective, a typical bathe makes use of 10 gallons of water. Subsequently, the larger your greywater tank, the longer it’ll take to empty.

Water Utilization

Since a typical bathe makes use of 10 gallons, you’ll solely be capable to bathe 4-6 instances earlier than your tank is full.

Should you’re by yourself or with a associate, that is wonderful. Nonetheless, your tank will refill shortly for those who’re with a bigger group of individuals.

How usually you empty your greywater tank is determined by what number of showers you are taking and the way usually you employ the sink in your RV.

It’s all the time sensible to pay attention to how a lot water you’re utilizing while tenting. Not simply due to your greywater tank, but additionally due to your freshwater tank.

Professional Ideas

  • All the time regulate your tank gauges. Forgetting to empty a tank could cause main points.
  • Take the gauge with a pinch of salt. Rest room paper and different waste could cause the gauge to be a bit of bit unacurate.
  • Don’t empty your greywater tank too usually. Solids settle on the backside of the tank, and with out sufficient water, they gained’t wash out. This can trigger them to dry up over time and harm your gauges.

Can You Dispose Of RV Gray Water Wherever?

The brief reply – no.

It’s unlawful to dump gray water in wildlife preserves and areas protected by the Bureau of Land Administration (BLM).

Should you’re uncertain, the rule of thumb – it’s most likely unlawful. So don’t take any possibilities.

It’s finest to get rid of greywater on the designated RV dump stations. Dump your black water first, after which your greywater.

Nonetheless, typically you’ll end up at a website with no dump station. Or maybe you’re tenting in a nationwide park. In these circumstances, there are a selection of the way in which you’ll get rid of your gray water legally.

Treating and Filtering

A sand filter for RV greywater.
A sand filter for RV greywater.
Supply: ecofootprintsa

The important thing to this methodology is to filter solids out of the water after which deal with it with chemical substances. The therapy kills micro organism and pathogens, stopping them from contaminating the surroundings. Disposing of the water over a big space ensures that it doesn’t pool up.

How Do You Go About Doing This?

One of the best ways to do that is to attach a pipe to connect a wonderful piece of fabric to the top of your greywater pipe. A fabric like cheesecloth will pressure all of the solids from the water.

Then, catch the greywater in a big bucket or watering can. As soon as the can is full, deal with the water with chlorine blocks. Go away the water in a single day to make sure that the chlorine does its job.

You possibly can get rid of the water in numerous shrubs and grasses the next day. Be certain that you unfold the water over a big space to stop pooling.

Then, repeat the method.

It’s a sluggish course of, however you retain your gray water tank at an affordable degree with out it filling up.

Can You Use A Retailer-Purchased Or Sand Filter?

You need to use a store-bought filter or perhaps a sand filter, however there are a selection of issues to bear in mind.

You’ll continuously want to alter the store-bought filter because the grease will clog up quick.

Sand filters are cheaper to switch however are extraordinarily sluggish.

On the finish of the day, it’s completely as much as you on the way you filter the water. Simply just be sure you take away the solids and deal with the water with chemical substances like chlorine.


The evaporation methodology is very efficient however solely works in scorching or heat environments.

Primarily, the solar heats your gray water, inflicting the water to evaporate and depart the solids behind. You possibly can then discard the solids in a waste bin.

There are a few strategies, starting from easy to complicated.

The Tarp Technique

The above image shows water pooling on a tarp. The water slowly evaporates, leaving solids behind.
The above picture reveals water pooling on a tarp. The water slowly evaporates, leaving solids behind.
Supply: heavydutytarps

That is the only and least expensive methodology.

Merely place a black tarp out within the solar. Guarantee that the perimeters of the tarp are elevated in order that the water gained’t simply run out. Then, encompass the tarp with security tape only for additional warning.

Pour your greywater onto the tarp, and await the water to evaporate.

One thing to bear in mind – do that straight after utilizing the water. Greywater will begin to stink after 24hrs. Having an open tarp with pungent water will trigger an odor that no one will take pleasure in.

The Towel Technique

The towel method of greywater evaporation.
The towel methodology of greywater evaporation.
Supply: wikiwickatron

Towels are nice at absorbing water; everyone knows this. So, utilizing this methodology takes benefit of this.

Utilizing gloves, dip the towels in your greywater, ensuring that they’re moist. Then, hold the towels up within the solar with a drip tray beneath.

The water will evaporate because the towels dry, leaving all of the solids and waste within the towels.

After tenting, give the towels an excellent wash in your washer.

Cell Gray Water Tanks

The above image shows a portable RV greywater tank hooked up to the vehicle.
The above picture reveals a transportable RV greywater tank hooked as much as the automobile.
Supply: blokenshed

A gray water tank on wheels – cell tanks mean you can empty your RV tank into them. Then, you’ll be able to take the cell tank to the dumbing website as a substitute of your complete RV.

Whereas tenting, you should use these cell tanks as additional storage. Since they’re compact and don’t leak, you’ll be able to fill them with greywater and retailer them in your RV.

This provides you the little additional cupboard space you may want.

Disposing of Gray Water at House

Should you’re storing your greywater to get rid of at residence, don’t simply pour it down the drain.

When at residence, there are different methods of disposing of greywater that’s higher for the surroundings.

To seek out out extra, you’ll be able to take a look at our article on greywater disposal.

RV Gray Water Tank Upkeep Ideas

Sustaining your gray water tank is sort of easy in comparison with the black water tank.

There are fewer solids in your greywater tank than within the black water tank. Due to this, there’s much less cleansing to do.

Nonetheless, there are a few ideas relating to sustaining your gray water tank.

  • Earlier than cleansing out your tank in line with your RV’s handbook, pour some washing liquid down the drain. The washing liquid will break down any grease or fats that’s within the tank. This can make it simpler to empty.
  • Don’t empty the tank too usually. As we mentioned above, it’s finest to attend till the tank is 2/3 full. This can assist flush the solids from the tank. As well as, it should assist flush any black water you’ve dumped.
  • Utilizing heavy detergents can hurt the surroundings. Don’t be tempted to pour bleach down the drain. Utilizing heavy detergents can hurt the surroundings. Particularly for those who plan on dumbing your greywater in a none standard means.
  • Don’t use antifreeze. If tenting in chilly climates or within the winter, don’t use antifreeze in your system. Utilizing this chemical and others prefer it, can harm the seals of your tank. As well as, they will harm the readers within the tank, inflicting your gauge to be off.

3 Finest RV Gray Water Tanks

Your RV comes with each black water and gray water tanks (together with a freshwater tank in fact).

The dimensions of the tank ought to affect which RV you buy.

We’ve gathered a listing of three moveable gray water storage tanks. Whether or not you’re in search of a bit of extra storage, or just intrigued, this record is for you.

It’s vital to notice that a few of these moveable water tanks require electrical energy to work. Should you’re going wild tenting, check out putting in photo voltaic panels in your RV.

Tote-N-Stor 25607 Moveable Waste Transport

Essential options

This 15-gallon moveable waste tank has a agency construct, two wheels, and a tow-bar fixture.

Moreover, it features a storage compartment for pipes and fixtures.

You’re in a position to hook it as much as your gray water tank after which transport the water to a dumping website. One of the best half? You gained’t have to maneuver your complete RV.

Contact the producer to search out out extra in regards to the guarantee of this product.

View worth on Amazon


  • Light-weight
  • Wheels
  • Storage compartment
  • Low price


  • Low sturdiness
  • Laborious to inform when the tank is full

BARKER 27844 32 Gallon Tote Alongside Moveable Holding Tank

Essential options

This moveable tank is the right stability between an awesome worth and nice high quality.

The tank simply suits below most RVs and its modern design means that you can retailer it in small areas.

The wheels permit for simple transport and the deal with is a cushty size.

In accordance with evaluations, there are issues with the gauge – having to unscrew it to permit air to move.

That mentioned, it has a 4.8-star ranking on Amazon.

View worth on Amazon


  • Compact measurement
  • Sturdy wheels
  • Nice price and high quality
  • Snug deal with


  • Requires further fixtures
  • You need to unscrew the fill gauge for airflow, making it inaccurate.

Camco 39000 Rhino Heavy Responsibility 15 Gallon Moveable RV Waste Holding Tank

Essential options

Should you’re in search of a tank that may survive all of it, this product is for you!

The Rhino is a heavy-duty tank that comes with so many attachments that it makes up for the value.

The tank can are available in many alternative sizes, starting from 15 gallons to 36.

Among the finest components? You possibly can connect further wheels to the tank, rising the convenience of transferring the tank.

The tank comes with so many equipment, it is best to positively check out what it has to supply.

View worth on Amazon


  • Heavy Responsibility
  • Sturdy wheels
  • Straightforward to wash
  • Contains adapters
  • Contains equipment
  • Can add further wheels


  • The deal with is brief and uncomfortable
Camco 39000 Rhino Heavy Duty 15 Gallon Portable RV Waste Holding Tank hooked to a tow-bar.
Camco 39000 Rhino Heavy Responsibility 15 Gallon Moveable RV Waste Holding Tank hooked to a tow-bar.
Supply: Amazon

Closing Ideas

Dealing with RV greywater isn’t as dangerous because it sounds!

The quantity of greywater your RV might want to maintain is totally dependent in your water utilization. The larger the tank, the extra water it holds.

And even then, there are moveable gray water storage tanks. This could enhance your tank quantity and are simple to move and empty.

Should you’re not at a campsite that has a wastewater dumping space, like wild tenting, there are different strategies.

Keep in mind, you’ll be able to’t simply dump your gray water anyplace. We’ve made certain to cowl this subject intimately and there are other ways in which you’ll get rid of your RV greywater, legally.

We hope this text has shed some mild on this subject! Tell us if there’s something particular you’d like to search out out about RV greywater.

Completely satisfied Tenting/Travels!


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