| Typical 30-amp Shore Power | 3,600 watts maximum |
| Typical 50-amp Shore Power | 12,000 watts maximum |
| Recommended Tongue Weight Range | 10–15% of loaded trailer weight |
| Black Tank Treatment Frequency | Each use; dump when 2/3 full |
| Water Pressure Regulator Limit | 40–50 PSI recommended for RV plumbing |
Why the Jargon Matters
Step into any RV dealership, campground, or online forum and you'll quickly encounter a language all its own. Terms like GVWR, boondocking, and black tank get tossed around as if everyone already knows them — but no one is born knowing what a slide-out topper does or why shore power matters. Getting comfortable with the vocabulary is a practical step toward safe, confident RV ownership.
This glossary covers the terms you're most likely to encounter in your first months of ownership, grouped by topic so related concepts stay connected. For a broader look at what the lifestyle involves, see our complete RV lifestyle introduction.
Boondocking
Camping without electrical, water, or sewer hookups, typically on public land or remote sites. Requires self-sufficiency using onboard tanks, batteries, solar panels, or a generator.
GVWR
Gross Vehicle Weight Rating — the maximum safe operating weight of an RV including passengers, cargo, fluids, and fuel. Exceeding it is a safety and legal concern.
Slide-Out
An extendable room section built into the RV wall that expands outward when parked to increase living space. Always retract before moving the vehicle.
Black Tank
The holding tank that collects toilet waste in an RV. It must be emptied at an approved dump station and treated with chemical solutions to manage odor.
Shore Power
Campground-supplied electricity delivered through a power pedestal. RVs plug in using 30-amp or 50-amp cords depending on their electrical system.
Dry Weight (UVW)
The weight of an RV as manufactured, without passengers, gear, water, or fuel. Used as the baseline for calculating how much payload you can safely add.
Tongue Weight
The downward force a trailer's coupler exerts on the tow vehicle's hitch ball. Proper tongue weight — generally 10–15% of loaded trailer weight — is critical for stable towing.
Winterizing
Preparing an RV's plumbing for freezing temperatures by draining water lines and adding RV antifreeze. Failure to winterize can cause cracked pipes and expensive repairs.
Leveling Jacks
Hydraulic or electric supports deployed to level the RV on uneven ground. Correct leveling is necessary for proper refrigerator operation and stable sleeping comfort.
Full Hookups
A campsite configuration providing simultaneous access to water, electricity, and sewer connections — the most convenient option for extended stays.
Gray Tank
The holding tank that collects wastewater from RV sinks and showers. Kept separate from the black tank and emptied at a dump station.
Payload Capacity
The weight available for passengers, cargo, water, and fuel — calculated by subtracting dry weight from GVWR. Understanding this number helps prevent dangerous overloading.
Weight, Capacity, and Towing Terms
Weight ratings are among the most safety-critical numbers attached to any RV. Exceeding them can compromise braking, suspension, and tire integrity — and may void your insurance coverage in the event of an accident.
| Typical 30-amp Shore Power | 3,600 watts maximum |
| Typical 50-amp Shore Power | 12,000 watts maximum |
| Recommended Tongue Weight Range | 10–15% of loaded trailer weight |
| Black Tank Treatment Frequency | Each use; dump when 2/3 full |
| Water Pressure Regulator Limit | 40–50 PSI recommended for RV plumbing |
- Dry Weight (UVW): The mass of the RV as it leaves the factory, with no passengers, cargo, water, or fuel. Also called Unloaded Vehicle Weight.
- GVWR (Gross Vehicle Weight Rating): The maximum total weight the vehicle is engineered to handle safely, including everything aboard. Never exceed this number. Read our full weight ratings explainer for a deeper breakdown.
- GAWR (Gross Axle Weight Rating): The maximum load each individual axle is rated to carry. Front and rear axles often have different ratings.
- Payload Capacity: GVWR minus dry weight — the amount of people, gear, water, and fuel you can actually add.
- Tongue Weight: For trailers, the downward force the hitch ball bears. Typically should be 10–15% of the trailer's total loaded weight.
- Tow Rating: The maximum weight your tow vehicle is rated to pull. Always cross-check the tow vehicle's rating against the loaded trailer weight.
Hookups, Systems, and Tanks
Understanding how your RV manages water, electricity, and waste keeps you from making costly or unpleasant mistakes at the campground.
- Shore Power: Electrical power supplied by a campground pedestal via a cord plugged into your RV. Most RVs use 30-amp or 50-amp service.
- Fresh Water Tank: The onboard tank that stores potable (drinking-quality) water for use when not connected to a campground water supply.
- Gray Tank: Collects wastewater from sinks and showers. Separate from the toilet system.
- Black Tank: Holds waste from the toilet. Requires periodic emptying at a dump station and routine treatment with tank chemicals to control odor and break down solids.
- Dump Station: A facility — at campgrounds, travel plazas, or dedicated sites — where RVers empty black and gray tanks into a sewer connection.
- Water Pressure Regulator: A device attached between a campground water spigot and your RV's inlet. Campground pressure can spike high enough to damage RV plumbing, so a regulator is considered essential.
- Winterizing: The process of draining water lines and adding RV-specific antifreeze to prevent pipe damage during freezing temperatures. A task typically done each fall in cold climates.
Don't Confuse Stabilizer and Leveling Jacks
These two types of jacks look similar but serve different purposes. Leveling jacks actually lift and level the RV; stabilizer jacks reduce movement once the vehicle is already level. Using stabilizer jacks to lift the RV can bend or damage them. Always consult your owner's manual before deploying any jack system.
Campsite and Lifestyle Terms
These terms shape how and where you camp — and knowing them helps you choose sites and plan trips that match your rig and preferences.
- Full Hookups: A campsite offering water, electricity, and sewer connections — the most convenient setup for extended stays.
- Dry Camping / Boondocking: Camping without any utility hookups, relying entirely on onboard tanks, batteries, and generators or solar. Popular on public lands and remote sites.
- Slide-Out: A room section that expands outward from the RV body when parked, significantly increasing interior living space. Must be retracted before driving.
- Leveling Jacks: Mechanical or hydraulic supports lowered to stabilize the RV on uneven ground. Proper leveling protects refrigerator function and improves comfort.
- Stabilizer Jacks: Reduce sway and bounce once the RV is already level. Unlike leveling jacks, they are not designed to lift the vehicle — confusing the two can cause damage.
- Full-Time RVing: Living in an RV as a primary residence rather than for vacations. It comes with distinct financial, legal, and logistical considerations. Our ownership cost guide covers ongoing expenses to budget for.
- Rig: Informal term for any RV or tow vehicle and trailer combination.
If you're exploring RV types for the first time, our Class A, B, and C motorhome comparison explains how size and layout differ across categories. Prospective renters will also benefit from our first-time RV rental guide before committing to a unit.