45 Rv Water System Rv Plumbing Diagram

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RV Water System RV Plumbing Diagram


In this article, we will explore the intricacies of the RV water system and provide a detailed RV plumbing diagram. Understanding how the water system in your RV works is essential for maintaining and troubleshooting any issues that may arise while on the road. So, let's dive in and take a closer look at the various components and their functions.

Water Source

The first step in the RV water system is the water source. Most RVs are equipped with a fresh water tank that can be filled either manually or by connecting to a city water hookup. It's important to know where your RV's water source is located and how to properly fill or connect it.

Water Pump

Once the water source is established, the water pump takes over. The water pump is responsible for pressurizing the water system and delivering water to the various fixtures in your RV. It is typically located near the fresh water tank and is powered by either electricity or the RV's battery.

Hot Water Heater

One of the most essential components of an RV water system is the hot water heater. This device heats the water before it reaches the faucets and showers in your RV, providing you with hot water for bathing and cleaning. The hot water heater can be powered by electricity, propane, or a combination of both.

Pipes and Fittings

The water in your RV flows through a network of pipes and fittings, similar to a traditional plumbing system. These pipes and fittings are usually made of plastic or copper and are designed to withstand the vibrations and movements of the RV while on the road. It's important to inspect these pipes and fittings regularly for any signs of leaks or damage.

Faucets and Showers

The faucets and showers in your RV are the points of use for the water system. These fixtures are connected to the pipes and fittings and allow you to access both hot and cold water. It's important to check the seals and connections of these fixtures regularly to ensure they are functioning properly and not leaking.


The toilet in your RV is connected to the water system and requires water for flushing. Most RV toilets use a foot pedal or a lever to control the flow of water. It's important to use RV-friendly toilet paper and to regularly maintain and clean the toilet to prevent clogs and odors.

Water Filtration

Water filtration is an important aspect of the RV water system, especially if you plan on using water from unknown sources. Installing a water filtration system in your RV can help remove impurities and contaminants, providing you with clean and safe drinking water.

Grey Water Tank

As water is used in your RV, it collects in the grey water tank. This tank holds water from sinks, showers, and appliances and should be regularly emptied to prevent odors and backups. It's important to follow proper dumping procedures and to dispose of grey water in designated areas.

Black Water Tank

The black water tank in your RV is responsible for holding waste from the toilet. This tank should be regularly emptied and cleaned to prevent odors and clogs. It's important to use RV-specific chemicals and follow proper dumping procedures when dealing with the black water tank.


If you plan on using your RV during the winter months, it's important to winterize the water system to prevent freezing and damage. This involves draining the water from the system, adding antifreeze, and insulating any exposed pipes or fittings. Proper winterization will help protect your RV's water system from costly repairs.


Even with regular maintenance, issues may still arise with your RV water system. Some common problems include low water pressure, leaks, and clogs. It's important to familiarize yourself with troubleshooting techniques and have the necessary tools and spare parts on hand to address these issues while on the road.


The RV water system is a vital component of your RV's overall functionality. Understanding how it works and how to properly maintain and troubleshoot it will ensure a smooth and enjoyable travel experience. By following the RV plumbing diagram and regularly inspecting and maintaining your water system, you can avoid costly repairs and keep your adventures on track.

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