Collecting rainwater from your roof is an effective step toward water conservation and reducing stormwater runoff. A rain barrel allows you to harness this natural resource for non-potable uses like watering gardens and washing cars, lowering utility costs. The variety of models available, from material type to included features, can make selection overwhelming. Choosing the best rain barrel requires evaluating its construction, understanding its functional components, and determining the appropriate size. The ideal model balances durability, usability, and capacity while fitting your budget and aesthetic preference.
Evaluating Construction Material and Design
The material of a rain barrel significantly influences its lifespan, price, and appearance. Polyethylene, a durable and affordable plastic, is the most common choice, often made from recycled content and resistant to cracking or fading under UV light. These plastic models are lightweight and easy to install. Look for food-grade plastic to minimize the risk of chemical leaching. Darker colored barrels, such as black or dark green, absorb more solar radiation, which encourages algae growth and warms the water. Lighter colors reflect heat, keeping the stored water cooler for plant application.
Galvanized steel offers superior longevity and durability, often lasting decades with minimal maintenance. However, these metal barrels are heavier and more expensive than plastic. The material can risk corrosion if not properly lined or if certain brass fittings are used. For homeowners prioritizing aesthetics, wooden barrels, frequently made from refurbished oak whiskey or wine barrels, offer a traditional look but require the most maintenance, needing periodic preservation treatments to prevent rot and decay. Flat-back designs are useful for small spaces, as they sit flush against a wall, unlike traditional round barrels which require more clearance.
Critical Features for Safe and Effective Water Collection
Beyond the barrel’s material, its functional components determine how effectively it can collect and dispense water. A fine-mesh inlet screen or filter is mandatory to keep out leaves, shingle grit, and debris that can clog the spigot or promote bacterial growth. This screen is also a first-line defense against mosquitoes, preventing them from laying eggs in the standing water. The barrel should be a fully closed system to ensure no pests can enter.
A reliable overflow mechanism is necessary for protecting your home’s foundation from water damage during intense rain events. The most effective systems utilize a downspout diverter that automatically redirects excess water back into the downspout once the barrel is full. This prevents water from spilling over the top and pooling against the house. The quality and placement of the spigot also influence usability, with brass fittings offering greater durability and resistance to leaks than plastic alternatives. Look for models with dual spigots: one high enough to fill a watering can, and a second, lower spigot for complete draining or connecting a hose. Linking kits allow you to connect two or more barrels in a series to increase total storage capacity.
Calculating the Right Size for Your Water Needs
Determining the appropriate rain barrel size requires a calculation based on your roof area and local rainfall patterns. The amount of water collected is tied to the square footage of the roof section that drains into your downspout. A straightforward rule is that one inch of rain falling on 100 square feet of roof space yields approximately 62 gallons of water. Since no system is 100% efficient due to wind loss, a conservative estimate is often used: multiply the roof area in square feet by the rainfall in inches, and then by 0.6 gallons.
For example, a 500-square-foot roof section receiving a one-inch rainfall event would collect around 300 gallons. This calculation helps balance the water you can catch against the water you need for intended uses, such as a garden. While a standard prefabricated barrel typically holds 50 to 55 gallons, you may need a larger model or a linked system if you live in an area with long dry spells or have a large landscape to irrigate. Consider the physical footprint, as larger capacities require more space and may affect installation aesthetics.
Comparing Top Models and Price Points
The price of a rain barrel correlates with its capacity, material, and the quality of its included fittings. Budget-friendly options, like collapsible vinyl barrels, can be found for less than $50, but they often lack durability and capacity. Standard, UV-resistant polyethylene barrels (50-to-55-gallon size) usually range from $130 to $300, offering the best balance of features and cost for most homeowners. Decorative models, such as those with faux stone finishes or built-in planter tops, often fall between $160 and $400.
High-end options, including large-capacity 90-gallon plastic tanks or wooden barrels, can cost $300 to over $500. When making a final purchase decision, examine the included components, as a higher initial price may save money if it includes a high-quality brass spigot and a professional downspout diverter kit.
Purchase Checklist
- Verify the material’s UV resistance.
- Confirm the presence of a fine mesh screen.
- Ensure the model is designed for linking if future expansion is desired.
- Look for a clear warranty.
- Read user reviews regarding the long-term integrity of the spigot and overflow components.