How big RV holding tank do I need?

How big RV holding tank do I need?
From my personal experience, the size of the RV holding tank you need depends on a few factors. Here’s what I’ve learned:

  • If you’re traveling alone or with one other person, a holding tank with a 50-gallon capacity should be sufficient. This is what I have in my small RV, and I find that I can go several days without needing to dump the tank.
  • If you’re traveling with a larger group, you’ll need a bigger holding tank. When I’ve traveled with four or more people, we’ve needed a tank with at least an 80-gallon capacity. This allows us to go a bit longer between dumps and reduces the hassle of having to find a dump station frequently.
  • It’s also important to consider how often you’ll be camping in places with dump stations. If you plan to stay in RV parks or campgrounds with dump stations frequently, you may be able to get away with a smaller tank. However, if you plan to boondock or camp in more remote areas, a larger tank will be necessary.
  • Finally, it’s worth noting that some RVs come with multiple holding tanks (e.g. separate tanks for gray water and black water). In this case, you’ll need to consider the capacity of each tank separately and make sure they meet your needs.

Overall, the size of the RV holding tank you need will depend on your travel style, group size, and camping plans. Consider these factors carefully before making a decision.

How Big Rv Holding Tank Do I Need?

Hey there, fellow RV enthusiasts! If you’re reading this, thenchances are you’re in the market for a new holding tank or wonderingabout upgrading your current one. As an experienced RV specialist, I’mhere to help answer the burning question on many beginner and seasonedRVer’s minds: ‘How big of an RV holding tank do I need?’

Firstly, it’s important to understand that the size of your holdingtank depends on various factors such as how many people will be usingit, how often you’ll be emptying it out, and how long you plan onstaying off-grid.

In general, larger tanks are ideal if you want to go longer withoutdumping but they also come with some downsides like additional weightand space requirements.

So let’s dive deeper into what you should consider when deciding onthe perfect size for your RV holding tank.

Types Of Holding Tanks

As an RV holding tank expert, it’s important to understand thedifferent types of tanks available for your rig.

There are two main types: fresh water and waste water tanks. Freshwater tanks hold the clean, potable water that comes from your on-boardor external source through water pumps.

On the other hand, waste water tanks store both grey water (fromsinks and showers) and black water (from toilets). It’s crucial to haveseparate dumping tanks for each type of waste to preventcross-contamination.

When dealing with waste in your RV, odor control is a top priority.Proper ventilation systems can help reduce unpleasant smells inside thevehicle.

Additionally, using enzyme treatments or chemicals specificallydesigned for RV holding tanks can help break down solid waste andeliminate odors.

Now that we’ve covered the basics of holding tank types and odorcontrol, let’s move onto calculating the right size tank for yourneeds.

Calculating Holding TankCapacity

So you’re ready to install a holding tank in your RV? Great! Butbefore we dive into the nitty-gritty of calculating the tank size, let’shave a little fun with some numbers.

Here are four things that hold more water than most RV holdingtanks:

  1. A standard washing machine drum can hold up to 25 gallons ofwater.
  2. The average bathtub holds around 50 gallons of water.
  3. An Olympic-sized swimming pool contains over 660,000 gallons ofwater!
  4. The largest man-made lake in the United States, Lake Mead, has acapacity of over 26 million acre-feet.

Now that we’ve put things into perspective, let’s talk aboutselecting an appropriate tank size for your RV.

One major factor to consider is water conservation. You don’t want tobe constantly filling and emptying tanks on a long trip or wasteprecious resources while camping off-grid. It’s important to assess yourusage needs based on how many people will be using the facilities andhow often they’ll need to use them.

Once you have an idea of your usage needs, it’s time to think aboutthe installation process and wastewater disposal. Some RVs come equippedwith pre-installed holding tanks, but if yours doesn’t, you may needprofessional help installing one properly. Additionally, proper disposalmethods should always be followed when emptying tanks to avoid pollutingnatural environments.

In summary, choosing the right sized holding tank for your RVinvolves considering factors such as water conservation and usage needs,navigating through the installation process and ensuring properpractices for wastewater disposal when it comes time to empty thosetanks.

Now that these key considerations have been discussed in detail,let’s move onto discussing tips for maintaining optimal performance fromyour newly installed holding tank system!

Selecting An AppropriateTank

When it comes to selecting a tank, tank capacity and size are two ofthe most important factors to consider. It’s essential to make sure youchoose a tank that has the appropriate capacity for your needs, as wellas a size that will fit in your RV.

Tank Capacity

Picture yourself driving through scenic routes and camping in thegreat outdoors with your RV.

As an expert on RV holding tanks, I know that one of the mostimportant features to consider is tank sizing when selecting anappropriate tank for your needs. The size of your holding tank willdepend on several factors such as how many people are using it, howoften you plan to dump it, and the length of time you’ll be campingwithout access to a dumping station. It’s also important to considerother tank features like material quality, venting systems, and sensorsfor accurate monitoring.

Furthermore, proper installation is essential for optimal performanceand longevity of your holding tank system. Remember, choosing the rightsize and features can make all the difference in ensuring a comfortableand stress-free trip!

Tank Size

Now, let’s dive deeper into tank sizing as an essential factor inselecting the appropriate RV holding tank for your needs.

As a specialist on RV holding tanks, I understand that storagerequirements and waste disposal are significant considerations when itcomes to choosing the right size of your holding tank.

You need to consider how much water capacity you’ll require based onyour usage patterns, such as cooking or showering habits. Additionally,whether you plan to camp for extended periods without access to dumpingstations will determine the ideal size of your holding tank system.

Properly assessing these factors will help ensure optimal performanceand longevity of your RV holding tank system while enabling comfortabletravel experiences.

Environmental Considerations

When it comes to choosing the size of your RV holding tank, there area few environmental considerations that need to be taken intoaccount.

One important factor is waste disposal. Depending on how often youplan on emptying your tanks, you may want a larger or smaller tanksize.

Another consideration is gray water, which refers to any wastewatergenerated from activities like washing dishes and taking showers. Toconserve water and make the most out of your tank space, considerinvesting in low-flow showerheads and faucets. Additionally, some RVparks offer on-site wastewater treatment facilities that can help reducestrain on your own tanks.

Tank sizes will ultimately depend on factors such as the number ofpeople using the RV and how long you plan on going between dumpingstations. It’s also worth noting that larger tanks can add weight toyour RV, so keep this in mind when selecting a size.

By taking these environmental factors into account, you can choosethe right sized holding tank for your needs while minimizing negativeimpacts on the environment.

Moving onto maintenance and care…

Maintenance And Care

When it comes to upgrading systems on your RV, one importantconsideration is the size of your holding tank. The amount of grey waterthat can accumulate in an RV depends largely on its size and how oftenit’s used. In general, you should aim for a minimum capacity of 40gallons if you have a small motorhome or trailer, and up to 100-150gallons if you have a large class A motorhome.

Proper usage is key when it comes to maintaining the integrity ofyour holding tank. Always be mindful of what goes down the drain – avoidputting anything solid or oily into the system. Additionally, make sureto use only cleaning products that are safe for septic systems.

When selecting materials for your tank, consider investing inhigh-quality plastic or fiberglass options which will hold up betterover time than cheaper alternatives made from less durablematerials.

As an RV specialist, I cannot stress enough how vital proper care andmaintenance are when dealing with holding tanks. By choosing the rightsize and material for your needs, understanding best practices aroundusage, and keeping regular tabs on upkeep tasks like flushing andsanitizing, you’ll ensure years of reliable service from this essentialcomponent of your rig’s plumbing system.


So, there you have it – everything you need to know about determiningthe appropriate size of your RV holding tank. As an RV specialist, I cantell you that selecting the right type and capacity of holding tank iscrucial for ensuring a safe and comfortable journey on the road.

Remember, before purchasing a new holding tank, take into accountfactors such as the number of people traveling with you, frequency ofuse, and environmental considerations.

A larger holding tank may seem like the better option at firstglance, but it could end up being more trouble than it’s worth if notmaintained properly or used efficiently.

Think of your holding tank as a vital organ in your RV: just like howwe care for our bodies through proper diet and exercise, so too must wemaintain our tanks with regular cleaning and conscientious usagehabits.

So go forth and select wisely when it comes to your RV holding tankneeds. With the right care and attention paid to this essentialcomponent of your mobile home-away-from-home, you’ll be able to enjoymany miles of worry-free travel on America’s open roads!