Georgia Water Tanks Online Store - Tanks, Pumps, and Filters - Rainwater Harvesting
Rainwater is a Resource
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Fittings

Shop water tank fittings including inlet penetrations, wall flanges, threaded connections, and pipe adapters designed to connect and seal your tank plumbing. Compatible with a range of tank types and sizes, these fittings help you build a secure, leak-free water storage system.

BULKHEAD FITTINGS
Bulkhead fittings create the leak-proof through-wall connection used for most tank inlets, outlets, and drains. A threaded body passes through a drilled opening in the tank wall and is secured with a backing nut and gasket on the inside, creating a watertight seal without welding. Available from 1/2" up to 4"+ in nylon or polypropylene, bulkhead fittings are the standard choice for thick-walled poly and fiberglass tanks, and are sized by the pipe diameter they connect to rather than the fitting's overall body size.

WALL FLANGES
Flange fittings use a flat, bolted or clamped connection, typically chosen for higher-pressure applications or larger-diameter pipe runs where a threaded or bulkhead connection isn't rated for the load. Flanged connections generally require higher installation torque than standard threaded fittings, so they're most common on larger commercial and industrial tank installations.

THREADED CONNECTIONS & PIPE ADAPTERS
Threaded fittings (NPT male and female) offer the easiest, most versatile installation for general-purpose plumbing connections, and are available in a wide range of adapter configurations to step between different pipe sizes or connect dissimilar fitting types. PTFE thread tape and hand-tight-plus-quarter-turn installation is standard practice to ensure a proper seal without over-tightening and cracking the fitting.

CAMLOCK QUICK-CONNECT FITTINGS
For fill and drain connections that need to be made and broken frequently — like filling from a water truck or connecting a temporary hose line — camlock fittings offer a tool-free, seconds-to-connect coupling with a built-in gasket seal. Available in sizes to match standard hose and pipe diameters, camlocks are a common choice for mobile filling operations and temporary tank setups.

Whether you're plumbing a new tank installation or replacing a worn fitting, our lineup covers the connection types needed to keep your system sealed, secure, and code-compliant.
1" threaded bulkhead fitting.
$33.00
2" Polypro Bulkhead Fitting W/EPDM Standard Flange Gasket; Thread x Thread End Connections
$56.00

This 1-inch PVC bulkhead fitting is designed for secure and leak-proof connections in tank and reservoir applications. Featuring socket x socket end connections and an EPDM flange gasket, it ensures a reliable seal for various fluid handling systems.​

$13.60
Rain Harvesting Pty Ltd -

The 4" Tank Overflow Elbow with Mozzie Stoppa Screen (PN TATO123) is a robust, purpose-designed overflow fitting for rainwater harvesting tanks and cisterns. It includes a built-in stainless steel insect screen—the Mozzie Stoppa—which blocks mosquitoes, frogs, and debris from entering your tank through the overflow line.

This 90° elbow fits standard 4" pipe or outlet fittings, directing excess water away from the tank base while protecting your system from contamination. Built from durable, UV-resistant materials, it’s ideal for both above-ground and below-ground installations.

$23.00

The Fernco 4" MultiTight Gasket (PN SV-4) is a heavy-duty, flexible rubber gasket designed to provide a watertight and gas-tight seal around 4" pipes passing through concrete tanks, risers, sumps, or wall sleeves. Engineered to accommodate pipe movement, pressure changes, and vibration, it ensures a secure, leak-resistant connection without the need for glue or sealant.

MultiTight gaskets are widely used in rainwater harvesting, septic, stormwater, and utility infrastructure applications where long-term durability and tight sealing are critical. The flexible design allows for quick, tool-free installation and helps maintain seal integrity even with minor pipe misalignment.

$12.00

?️ Rain Harvesting Mozzie Stoppa 4-Inch Flap Valve 

Part Number: TAFV104 

? Insect-proof stainless steel mesh valve for rainwater tank overflow protection 

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?️ Product Overview 

The Rain Harvesting Mozzie Stoppa 4-Inch Flap Valve is designed to prevent mosquitoes and pests from entering your rainwater tank through the overflow pipe. Featuring a 1/32" aperture grade 316 stainless steel mesh, it ensures effective insect exclusion while allowing air circulation to maintain water quality. The self-cleaning, double-sealed flap prevents over-rotation and remains securely closed when not in use. 
$22.69
RainHarvesting -

3-Inch Tank Overflow Kit 

Efficiently manage excess water in your rainwater harvesting system with this durable overflow solution 

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Product Overview 

The 3-Inch Tank Overflow Kit is designed to provide a reliable and efficient method for directing excess water away from your rainwater storage tank. This kit helps prevent overflows that could lead to water damage or system inefficiencies. Constructed from high-quality materials, it ensures long-lasting performance in various environmental conditions. 

$25.00
size

The TASS07 Tank Guardian is a 16" inlet screen designed to keep leaves, debris, mosquitoes, and pests out of your rainwater tank. It provides durable, high-flow screening with a dome profile that sheds debris and helps maintain clean tank water.

 

$65.00
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