68 oz Accumulator Expansion Tank – Reduces Pump Cycling, Smooth Water Flow, Max 150 PSI, 1/2" MNPT, Compact Design for RV, Marine, Boat & Off-Grid Systems (68oz (2L))

oiununo thermal expansion tank is suitable for various water system applications, including residential well water supply systems, water heating systems, boiler systems, solar thermal systems, marine, RV water systems and other water applications. This expansion tank feature thick-walled carbon steel construction, food-grade 304 stainless steel 1/2" MNPT connection, food-grade EPDM rubber. This expansion tank is certified for potable water applications. Our expansion tanks are engineered for long-lasting performance with food-graded materials.

• ✔ 【Specifications at a Glance】 Volume: 68oz (2L) | Max Pressure: 150 PSI (10.34 Bar) | Connections: 1/2" MNPT | Valve Type: Schrader Air Valve (Bicycle Pump Compatible) | Dimensions: 8.2in x 5.0inch
• ✔ 【Extend Pump Life by Reducing Cycling】 Drastically cuts down short-cycling, which wears out pumps prematurely. This accumulator expansion tank keeps your water pump from turning on and off too often—saving battery power, reducing wear, and adding years to your pump’s life. Ideal for RVs, marine, and off-grid setups.
• ✔ 【Silence Water Hammer & Enjoy Smooth Flow】 Eliminates pressure spikes and water hammer for a steady, drip-free stream at every faucet, shower, or sink. Enjoy consistent water pressure and noticeably quieter operation—no more sputtering or noisy pipe vibrations in your boat, motorhome, or cabin.
• ✔ 【Built Tough for High-Pressure & Harsh Environments】 18-Gauge Carben Steel Thick-walled & Handles High Pressure.This water expansion tanks feature thick-walled carbon steel construction with factory test pressure rating of 207 PSI. Handles water hammer impact and cyclic pressure fluctuations (e.g., pump start/stop cycles). While factory-tested to 207 PSI, our expansion tanks require operating pressures ≤150 PSI for sustained safety and service life.
• ✔ 【Food-grade Materials】 The thermal expansion tank features a 1/2" MNPT connection constructed of food-grade type 304 stainless steel. Also, The expansion tank diaphragm is fabricated from food-grade EPDM rubber, ensuring compatibility with potable water systems.