Pre-Pressurized Accumulator Tank - 24 oz.. Specifically designed to be installed downstream of your pump, this tank helps reduce unwanted cycling, pulsation and pressure spikes, while helping to prolong pump life and save battery power. SHURFLO's accumulator tank uses a patented domed displacement diaphragm to minimize noise and power usage. This 24 oz. accumulator tank accommodates space constraints in your RV.. Features:. Reduces Pump Cycling. Smooths Water Faucet Pulses. Pre-Pressurized to 30 PSI with Built-In Diaphragm