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RainHarvest ADAPT User Manual

Please read this entire manual before installing and using your new product.

Thank you for choosing the RainHarvest ADAPT Rainwater Collection System! This user manual will guide you through the installation and usage of the system, which is designed to adapt to standard gutter spouts on your recreational vehicle (RV). With this system, you can collect rainwater for various purposes, such as showering, cooking, washing dishes and even drinking when properly filtered. 


Table of Contents


  • System Components

  • Installation

  • Operating Instructions

  • Maintenance and Care

  • Troubleshooting

  • Safety Precautions

  • Warranty Information


System Components


This RV Rain Collection System includes either of the following Items:


  • Item No. WWRV-RHA

  • Item No. WWRV-RHA2

  • Item No. WWRV-RHA4


These are specialized adapters that fit snug onto the standard gutter spouts on your RV. They are designed to efficiently channel rainwater into your freshwater tank or external reservoir.




Follow these steps to install your WildWater RV RainHarvest ADAPT:


  • Step 1: Identify the location(s) of the standard gutter spouts on your RV. Identify the gutter spouts where rainwater runoff is maximized and prepare to install the product(s). 
    Note: You may need a step stool or ladder to safely reach your RV’s gutter spouts.


  • Step 2: Attach the RainHarvest ADAPT unit(s) by sliding the silicone sleeve over top of the existing gutter spout(s). Secure the sleeve firmly by gently pushing and twisting until the inner barb is fully seated against the plastic gutter spout on your RV. 


Operating Instructions


Once the WildWater RV RainHarvest ADAPT is installed in one or more locations, follow these instructions to collect and utilize rainwater:


  • Step 1: Before each rain event, ensure that you have the necessary components to collect rainwater. This may include but is not limited to: hoses, screens, in-line filters, splitters, fitting adapters and reservoirs. 


  • Step 2: WildWater RV recommends placing an O-Ring screen at the top of each hose you plan to use for rain catchment. It is also recommended that you use drinking grade hoses and components. 


  • Step 3: Connect the female end of your hose to the adapter. Connect the other end of the hose to your desired additional components (referenced in Step 1) or directly to your reservoir. 


  • Step 4: During a rain event, the water will be channeled from the RainHarvest ADAPT unit(s) into the hose(s) and directed to your storage tank (fresh water tank or external reservoirs). 


  • Step 5: Monitor the storage tank's water level. When the tank is full, utilize a new storage solution or disconnect your hose. 


Maintenance and Care


To keep your RainHarvest ADAPT in optimal condition, please follow these instructions:


  • Regularly inspect the silicone sleeve for any signs of damage, blockages, or leaks.

  • Clean the RainHarvest ADAPT periodically to remove any debris or dirt that may obstruct the flow of water.

  • Store the RainHarvest ADAPT in a safe and dry space when not in use.

  • Make sure your RV gutter rails are clean and clear of any dirt and debris prior to use. 

  • If you anticipate prolonged periods without rain, consider disconnecting all components to properly dry. This is a good time to inspect every component for any issues. 




If you encounter any issues with the WildWater RV RainHarvest ADAPT, refer to the following troubleshooting tips:


  • If water is not flowing into the storage tank during rain, check for any blockages in your gutter rails, existing gutter spout, RainHarvest ADAPT, O-Ring screens, or hoses, as well as any other additional components you may have connected that rainwater would flow through. 

  • Inspect all fittings and connectors for tightness and potential leaks. Replace any damaged or worn-out components.

  • If you suspect a manufacturer defect, please reach out to at your convenience. 


Safety Precautions


To ensure your safety and the proper functioning of the RV Rain Collection System, please observe the following precautions:


  • Always use caution when working at heights or on ladders during installation and/or maintenance.

  • Use appropriate protective gear, such as gloves and safety glasses, when handling components or performing maintenance tasks.

  • Always remove the adapters as well any additional components that are not permanently installed from your RV before travel. 

  • Do not drink collected rainwater unless it has been properly filtered and treated for consumption.

  • Adhere to local regulations and guidelines regarding rainwater collection and usage.


Warranty Information


The WildWater RV RainHarvest ADAPT is covered by a limited 1-year warranty. If you suspect any potential manufacturer defect, please reach out to our customer support team at as soon as possible and preferably before installation and use.

For any further assistance or inquiries, please contact our customer support team at

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