GROCO Pressure Storage Tank - 1.4 Gallon Drawdown

The GROCO Pressure Storage Tank with 1.4 gallon drawdown capacity is a pneumatic pressure regulation system designed to eliminate water logging and ensure consistent water delivery in marine and RV freshwater systems. This tank separates the pressurized air charge from system water using an internal rubber bladder, preventing the corrosive effects of water-to-air contact that degrades conventional tanks. Ideal for cruisers, boaters, and RV enthusiasts who demand reliable, maintenance-free pressure regulation, this storage tank maintains even temperature mixing and smooth pressure delivery under demanding conditions.

The engineering behind this pressure storage tank centers on the elastomer bladder design, which matches the pump cut-on pressure to prevent water logging while maintaining stable system pressure across varying flow demands. The bladder isolates the air charge completely from potable water, eliminating dissolved air buildup that causes pressure surges and cycling noise. At 9.1 pounds with compact dimensions (12 x 11 x 17 inches), the tank integrates seamlessly into tight galley and engine-room installations while delivering 1.4 gallons of usable drawdown volume—sufficient for consistent flow between pump cycles in most cruising vessels and motorhomes.

This GROCO tank performs best in freshwater systems operating between 30–50 PSI, making it compatible with most marine pressure pumps and RV water systems where voltage or engine RPM fluctuations would otherwise cause pressure instability. Installation requires basic plumbing connection to the system discharge line; no special tools or modifications are necessary. Users consistently report quieter operation, reduced pump runtime, and extended pump lifespan compared to unsealed storage tanks. Whether upgrading an existing system or outfitting new construction, the GROCO Pressure Storage Tank delivers the reliability and performance expected from commercial-grade marine equipment.