2.1Gallon Accumulator Expansion Tank for Water Heater, Potable Thermal,3/4 Inch MNPT Connection

Product Description Stop the Drip. Extend the Life of Your Water Heater. If you hear your water heater making rumbling noises or notice your T&P valve leaking, you likely have a thermal expansion issue. In a closed plumbing system (where a check valve or backflow preventer is installed), water expands when heated. Without somewhere to go, this increases pressure inside your heater and pipes, leading to premature failure. Our 2.1-Gallon Potable Thermal Expansion Tank solves this problem instantly. How It Works: This expansion tank features a flexible butyl diaphragm that separates a pre-charged air cushion from the incoming water. When water heats up and expands, it flows into the tank, compressing the air cushion. When you turn on a hot water tap, the compressed air pushes the water back into the system. This cycle maintains consistent pressure and protects your entire plumbing system . Technical Specifications: Capacity: 2.1 Gallons (8 Liters) Connection: 3/4" Male NPT (National Pipe Thread) Max Pressure: 150 PSI Max Temperature: 200°F (93°C) Pre-Charge: 40 PSI (Adjust as needed to match home water pressure) Certifications: Compliant with NSF 61 and EPA regulations for potable water . Why Choose Our Tank? Stop Leaks: Immediately stops the "weeping" or popping of your pressure relief valve. Energy Efficiency: Prevents pressure spikes that can waste energy and water. Professional Grade: Used by plumbers and DIY homeowners alike. Package Includes: 1 x 2.1 Gallon Thermal Expansion Tank (Threads protected with plastic cap for safety)

• PROTECT YOUR WATER HEATER: Stops T&P valve leaks caused by thermal expansion in closed-loop systems. This 2.1-gallon tank absorbs excess pressure, extending your water heater’s lifespan and ensuring safe operation.
• 100% DRINKING WATER SAFE: High-grade butyl diaphragm and seamless TPV liner prevent corrosion and waterlogging. Fully compliant with EPA & Prop 65 standards, safe for residential and commercial potable water.
• DIY-FRIENDLY INSTALLATION: Universal 3/4" MNPT connection fits most standard water heaters. Max Pressure to 150 PSI, Pre-charged to 40 PSI, and compact design mounts easily in tight spaces.
• RUSTPROOF FINISH: Coated with heavy-duty, appliance-quality paint. Resists scratches, rust, and corrosion in basements, garages, or outdoors.
• VERSATILE 2.1 GALLON SIZE: Fits residential heaters up to 50/60 gallons. Also ideal for combi-boilers and hydronic systems. Prevents pressure spikes by absorbing and returning expanded water.