The Davey Supercell 24018P is an 18L pipe-mounted steel pressure tank for household, farm and other water-pressure systems. A flexible rubber diaphragm separates the water from compressed air, which pushes water out when a tap opens. This reserve allows smaller amounts of water to be used without starting the pump each time. Fewer starts reduce wear from repeated starting and stopping, helping extend pump life, and can reduce electricity use and running costs. The pipe-mounted tank connects vertically to the pump delivery pipework and needs suitable support.
Water connection: 1" BSP male thread. The tank connects vertically to the pump delivery pipework.
Nominal tank volume is the vessel size, not the amount of water available between pump starts. Usable draw-off depends on the pump’s start and stop pressures and the tank air charge. At pump start/stop pressures of 200–400 kPa, usable water draw-off is roughly 40% of nominal tank volume. Other pressure settings and control types give different results.
The steel shell has an epoxy primer and two-part polyurethane enamel finish for corrosion and UV resistance. Inside, a butyl-rubber diaphragm and virgin polypropylene liner keep the water separated from the air cushion and steel shell. The water connection is stainless steel.
The diaphragm and liner are suitable for potable-water applications. Other uses include rainwater and booster systems, irrigation, water-hammer control and suitably designed hydronic expansion or mains-water toilet-flushing systems. Select the tank and controls for the application.
Maximum working pressure is 1000 kPa and maximum water temperature is 90°C. Protect the tank and connected pipework from freezing.
Set the air charge to suit the pump controls and system pressures. Pressure-switch, electronic and variable-speed systems can require different settings; follow the tank and pump/controller instructions.
Install vertically in a covered, dry position with drainage and access for servicing. Support the tank and pipework appropriately. Release the water pressure before checking or adjusting the air charge.
Five-year Davey warranty, subject to its terms.
Davey Supercell P Specifications & Draw-off Table
Davey Supercell Pressure Tank Installation & Operating Instructions
