Browse categories of Solar Mixing Valves Air Vents DISCAL® (air separators) Safety Relief Valves Accessories Devices for solar thermal systems. Mixing Valves Adjustable thermostatic mixing valve Air Vents Automatic air vent DISCALAIR®, Automatic air vent (high performance) DISCAL® (air separators) DISCAL®, Air separator Safety Relief Valves Safety relief valve Accessories Shut-off (fits automatic air vent) Vent cap adapter