Correct way to fill a brand new Zelos without pressure via a CS4-I

Do you plan to have the compressor used or stored in a cold environment? I have the same compressor and it's kept indoors. Even in the winter, the temps inside won't drop below 67 degrees. Distilled water, per the user manual, is fine for my purposes.

jde727831 said:

Hello everyone,

I have a brand new Umarex Zelos and want to fill it via my CS4-I compressor? After I function check it an fill it with coolant? Also, it better to fill the compressor with water or coolant? Thanks in advance for any guidance.

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Lots of threads here about the GX compressors to research and get information. Mine's the CS4 and just hit 100hrs, am going to do a tear down inspection and possibly preventative maintenance. Still dead head test within a few seconds of new. Per others here, I added tad of Purple Ice, some use Water Wetter. Making sure you really purge any trapped air out the radiator is important water flow. If just direct filling a gun shouldn't have much worries about high running temperatures. Large tanks, long runs, better to do in intervals with cool down periods despite 5hr rated run time. Heat is what kills compressors over time. Over greasing will also cause higher operating temps, it's a case where a little is better than alot.
Hope yours gives you as much use and satisfaction as mine has. Any issues and GX is pretty good with their customer service and warranty.

Remember to cock the rifle. You cannot hear the air coming out with the compressor running. The hammer spring will open the valve with zero pressure.