The primary condensate drain lines normally drains into the household sewer system through an open connection to an active p-trap. When pin (3) of the timer integrated circuit 28 goes to +V (valve closed condition) the timer integrated circuit 33 is enabled in its astable mode, thereby simulating a valve opening condition for a period of approximately two seconds every ten minutes, by switching the transistors 37 and 38 to ON should the valve 22 not otherwise open as a result of pin (3) of the timer integated circuit 28 going to zero volts.
Electrical leads 23 connect the probe 20 and the wall of the drain line 21 to an electronic circuit 24 which has voltage supply leads 25 and which is connected to the solenoid compressor drain of the valve 22 by leads 26. This condensate, if not drained properly, will damage equipment and decrease the overall efficiency of your compressed air system.

It has an added benefit of resulting zero compressed air losses and has several different types of drain valve including- Eco auto drain valve, Pneumatic, Electronic, Solenoid, level sensor, automatic, air pipe, water, No air loss, compressed air tank and moisture drain valve.
It is now the practice to put a screw drain plug in the bottom of the sump and when the operator decides to drain out the water and the sump 8 permits a large quantity of water and such other foreign material to build up in the sump thereby to reduce the frequency with which the water and such other impurities must be removed.

According to the Carson Dunlop training manual there are some limitations to inspecting your central air conditioning system, which are; you shouldn't test an air conditioner when the ambient air is below 65 degrees F or has been below 65 degrees in the past 24 hours, don't test if the power has been off for at least 12 to 24 hours because compressor could seize, most parts of air conditioner are not visible without removing plates etc which is beyond the scope of a home inspection and the interior cooling coil is normally not visible for inspection.
Electronic timer drains are a very popular choice, easy to install, cost-effective and have a reliable operation when installed with an inlet strainer. Kaeser Automatic Magnetic Drains (AMD) remove condensate and other contaminants from your air system. This design allows the installer to drain the tank faster, resulting in a reduction in service time.
A float drain can be considered no-waste, in fact they can be considered a good choice for many filter applications. 3-Weg Electric Ball Valve (bore >8mm):For larger flow rates, such as central heating, irrigation, compressed air etc. The condensate discharge requirements are ultimately determined by the purpose for which the treated compressed air is used.

Most float-operated drain valves leave a small amount of condensate in the reservoir when discharging, this prevents the loss of valuable compressed air. Itself When Replacing Open Condensate Drains Valves or Timer Traps. Some filters come with an external float drain that could also be used elsewhere in the system.
Description: The CA10S is a float type automatic liquid drain trap for air and gas systems. They provide a completely redundant pump, power source and check valve to the existing sump pump system-thereby "backing up" the major causes of a sump failure. Compressed air is air that is compressed to a higher pressure than atmospheric pressure.
The most effective means of controlling moisture in the system is to install a New Jersey Dri Air Compressed Air Separator as far as possible from the compressor with New Jersey Condensate Drains installed wherever moisture collects in the lines. Economical alternative to electric motorized ball drain valves.