Johnson Pump Accumulator Tank - ¾" Hose Barb

The Johnson Pump Accumulator Tank with ¾" Hose Barb is a pressure-stabilizing component designed for marine water systems where smooth, consistent flow matters. Built for cruisers, fishing boats, and live-aboard vessels, this accumulator absorbs pressure spikes and surges that occur in raw water cooling loops, washdown systems, and baitwell circulation setups. If you've spent time on the water and experienced pump chatter, water hammer, or inconsistent pressure at your galley faucet, you understand why this compact yet essential tank deserves a place in your mechanical bay—it's the unsung hero that keeps your systems running quietly and reliably.

This accumulator operates by maintaining a cushion of air inside a sealed tank that compresses when pump pressure rises, then releases that stored energy to supplement flow during demand spikes. The ¾" hose barb inlet allows direct connection to standard marine hose without additional fittings, and the compact 8 x 5 x 11-inch footprint fits easily into tight engine compartments or utility lockers. At 3.1 pounds, it adds negligible weight while delivering meaningful performance—reducing noise, extending pump life by minimizing cycling frequency, and evening out pressure fluctuations that can damage delicate marine plumbing or weaken hose connections over time. Johnson Pump's proven engineering ensures dependable operation even in salt-air environments where corrosion resistance is non-negotiable.

Installation works best on moderate-displacement pumps serving deck wash, engine cooling, or galley systems in recreational and commercial vessels up to 45 feet. Position the tank as close as practical to the pump discharge, and include it in your preventive maintenance routine by checking the pre-charge air pressure annually—especially after winter layup. Anglers and live-aboards who've upgraded their water systems consistently report quieter cabin environments and fewer nuisance pressure-relief activations, making this Johnson Pump accumulator tank a cost-effective upgrade that pays dividends in reliability and comfort.