Quick Answer
A simple DIY first flush diverter can be created using a 10-gallon bucket, a 1-inch PVC pipe, and a PVC elbow, costing around $20. This setup allows the first 10 gallons of roof run-off to bypass the storage tank, keeping it free from contaminants and debris.
Gathering Materials and Designing the System
To create a DIY first flush diverter, you’ll need a 10-gallon bucket, a 1-inch PVC pipe, a PVC elbow, and some PVC cement. Measure the roof’s run-off area and calculate the required pipe size for optimal flow. A 1-inch pipe is sufficient for most residential roofs. Use the PVC elbow to create a 90-degree turn, which will direct the first 10 gallons of water into the bucket.
Building the Diverter
Cut the PVC pipe to the desired length, leaving about 1 inch of excess pipe at the end. Attach the PVC elbow to the pipe using PVC cement, making sure to clean and dry the surfaces before applying the cement. Place the bucket under the pipe, allowing the first 10 gallons of water to flow through the diverter and into the bucket. Attach the other end of the pipe to the storage tank, ensuring a secure connection.
Installing and Testing the System
Install the diverter under the roof’s downspout, positioning it at a slight incline to maintain the water flow. Test the system by simulating a rain shower, checking that the first 10 gallons of water flow into the bucket, and the remaining water flows into the storage tank. Adjust the pipe length or diverter position as needed to optimize the system’s performance.
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