GROCO PST-2 Pressure Storage Tank - 1.4 Gallon Drawdown

Eliminate "pump cycling" and enjoy a smoother, quieter water system with the GROCO PST-2 Pressure Storage Tank. This high-quality accumulator tank acts as a buffer for your boat's fresh water system. By storing pressurized water in a heavy-duty internal bladder, it allows the pump to stay off during low-demand tasks—like washing your hands or rinsing a glass—reducing wear and tear on your water pump and saving battery power.

The PST-2 is finished in a durable white powder coat and features a classic, rugged design that has been a staple in marine plumbing for decades.

Key Features

• Reduces Pump Cycling: Stores a reserve of pressurized water so your pump doesn't have to turn on every time you crack a faucet.

• Large Drawdown Capacity: Provides 1.4 gallons of usable water before the pump needs to engage (at standard pressure settings).

• Maintenance Free Bladder: Features a heavy-duty internal rubber bladder that keeps air and water separate, preventing "waterlogging."

• Quiet Operation: Dramatically reduces the "hammering" noise and vibration often associated with high-flow marine water pumps.

• Mounting Versatility: Can be mounted in any orientation (vertical, horizontal, or inverted) to fit into tight bilges or cabinets.

• Standard Tire Valve: Equipped with a standard Schrader valve to easily adjust the air pre-charge to match your pump's cut-in pressure.

In The Box

Technical Specifications

• Model Number: PST-2

• Total Volume: Approx. 4.4 Gallons (16.6 Liters)

• Drawdown Volume: 1.4 Gallons (5.3 Liters)

• Max Working Pressure: 100 PSI (6.8 Bar)

• Pre-charge Pressure: Factory set at 20 PSI (Adjustable)

• Connection: 3/4" NPT Female

• Dimensions: 13.5" Height x 11.25" Diameter

Pro Tip: For the most efficient operation, use a tire pressure gauge to set the tank's air pre-charge to 2 PSI below your water pump's "cut-in" (turn-on) pressure while the water system is depressurized.