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RainHarvest PRO User Manual

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

Thank you for choosing the RainHarvest PRO Rainwater Collection System! This user manual will guide you through the installation and usage of the system, which is designed to replace 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


  • Tools Required

  • System Components

  • Installation

  • Operating Instructions

  • Maintenance and Care

  • Troubleshooting

  • Safety Precautions

  • Warranty Information


Tools Required

  • Utility or putty knife

  • 100 silicone clear caulk

  • Drill and drill bit

  • Philips screwdriver

System Components

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

  • Item No. WWRV-RHP 

  • Item No. WWRV-RHP2 

  • Item No. WWRV-RHP4

These are specialized gutter spouts that will replace the existing gutter spouts on your RV. They are designed to interface with a standard garden hose thread to channel rainwater directly to your freshwater tank or other reservoir.



Please follow these steps to install your RainHarvest PRO:

Step 1: 

  • Identify the left and right side RainHarvest PRO’s and note where each one should be installed.

  • Note: You may need a step stool or ladder to safely reach your desired installation area.


Step 2:

  • If you have existing gutter spouts, remove them from your RV using the appropriate tools. 

  • Note: You may need to pull back the vinyl cover on the drip rail to access a screw if your existing gutter spouts are attached with a screw (If there is no hole already drilled from an existing gutter spout, you will need to drill a small hole in the gutter rail with Step 3). 

  • After removal, ensure that the surface is clean and free from any debris.


Step 3: 

If there is a hole already drilled from an existing gutter spout:

  • Slide the RainHarvest PRO behind the drip rail. Drill through the RainHarvest PRO in the center of the mounting area, and into the existing hole in your gutter rail.


If there is not an existing hole:

  • Slide the RainHarvest PRO behind the rail, align the RainHarvest PRO so it is sitting flush against your RV, and drill a hole through the RainHarvest PRO and the outer wall of your RV.

  • Note: The drill bit size will need to correspond with the mounting screw you plan to use. 

Step 4:

  • Insert a screw into the hole and secure using your screwdriver. Do not use a power tool for this. 


Step 5:

  • Using your clear silicone caulk, cover the screw hole and surrounding area to make sure you have a secure, water-tight connection.


*Repeat steps 1-4 for each RainHarvest PRO in your kit*


Operating Instructions


Once your RainHarvest PRO unit(s) are installed, follow these instructions to collect rainwater.


Step 1: 

  • Before each rain event, ensure that your hose(s) are properly connected to the RainHarvest PRO unit(s) and the storage tank is ready for use. Also ensure that you have the additional 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: 

  • It is recommended to place 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 RainHarvest PRO. 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 PRO 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 PRO in optimal condition, please follow these instructions:


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

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

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




If you encounter any issues with the WildWater RV RainHarvest PRO, 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, RainHarvest PRO’s, O-Ring screens, or hoses, as well as any other additional components you may have connected that rainwater should 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 RainHarvest PRO unit(s), please observe the following precautions:


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

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

  • Always remove any components that are not permanently installed from your RV before travel.

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

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


Warranty Information


The WildWater RV RainHarvest PRO 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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