Precision supplies a complete Aquasystem range of diaphragm expansion tanks.

We carry a full stock of tanks from 8 liters to 600 liters with smaller sizes also available in the flat (pancake) version (7, 8, 12lt only).

Precision Supplies has also developed the EXPAK, or fill kit for our tanks which incorporates an automatic fill valve isolating valve, pressure relief valve, and automatic air vent, all pre-assembled on a brass air separator.