The SHURflo Pre-Charged Accumulator Tank reduces water faucet flutters and decreases pump cycling to keep water line pressure up without spikes and pump motors cool. An internal bladder prevents air from dissolving into the water. The SHURflo® accumulator tank also diminishes plumbing system noise, increases the life of your pump and saves battery power. The accumulator easily manages pressure requirements from 20 psi to 125 psi. Coupler fitting is included.