How much water does an rv toilet use per flush?

How much water does an rv toilet use per flush?

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When it comes to RV living, one important consideration is water usage. RV toilets, in particular, have a reputation for being water-intensive. But just how much water does an RV toilet use per flush? In this article, we will explore this question in-depth and provide you with the information you need to make informed decisions about water consumption in your RV.

Water Usage of RV Toilets

Types of RV Toilets: There are several types of toilets commonly found in RVs, including gravity flush toilets, macerating toilets, and composting toilets. Each type has its own water usage characteristics.

Gravity Flush Toilets: Gravity flush toilets are the most common type of RV toilet. These toilets use a water-filled bowl and rely on gravity to flush waste into the holding tank. The water usage per flush for gravity flush toilets typically ranges from 1.6 to 3 gallons (6 to 11 liters). However, some newer models are designed to use less water, with low-flow options available that use around 1 gallon (3.8 liters) per flush.

Macerating Toilets: Macerating toilets are a more water-efficient option for RVs. These toilets use a macerator pump to grind waste into a fine slurry before pumping it into the holding tank. Macerating toilets typically use around 1 gallon (3.8 liters) of water per flush.

Composting Toilets: Composting toilets are a waterless option for RVs. These toilets separate liquid waste from solid waste, with the liquid waste being evaporated and the solid waste composted. Composting toilets do not require any water for flushing.

Factors Affecting Water Usage

Flush Control: Some RV toilets offer adjustable flush controls, allowing you to choose between a full flush and a partial flush. Opting for a partial flush can help conserve water, especially for liquid waste.

Water Pressure: The water pressure in your RV can also affect the amount of water used per flush. Higher water pressure can result in more water being used, while lower water pressure may require multiple flushes to clear the bowl.

Water-Saving Modifications: There are several modifications you can make to your RV toilet to reduce water usage. Installing a water-saving flush valve or a water-saving spray nozzle can help minimize water consumption per flush.


The amount of water an RV toilet uses per flush can vary depending on the type of toilet and any water-saving features it may have. Gravity flush toilets typically use between 1.6 to 3 gallons (6 to 11 liters) per flush, while macerating toilets use around 1 gallon (3.8 liters) per flush. Composting toilets, on the other hand, do not require any water for flushing. Factors such as flush control, water pressure, and water-saving modifications can also affect water usage.

When considering water consumption in your RV, it’s important to be mindful of your usage and explore options for reducing water waste. By choosing water-efficient toilets and implementing water-saving modifications, you can minimize your environmental impact and make the most of your water resources while on the road.