Is this safe?

Standard pumps are gearless, so there's nothing to break unless you have debris in your loop which isn't likely. You can either blow or suck the water by whatever means as long as you don't do it while the system is sealed, ie. not open on both ends.
 
Standard pumps are gearless, so there's nothing to break unless you have debris in your loop which isn't likely. You can either blow or suck the water by whatever means as long as you don't do it while the system is sealed, ie. not open on both ends.
Thanks for the response sir.
 
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