Over flow help

[Droneshooter]

Does anybody know how I'm suppose to get this over flow working I have all the parts I just don't know how to get water running though the clear U tube part

 

[Pleco1415]

I think it works the same way as a gravel cleaner does. You have to suck on the end to get a flow going.

 

[HN1]

See if this helps. CS Overflow - Overview and Installation - YouTube

 

[Droneshooter]

Thank you both for replying I figured it out got it running in the sink at the moment gonna let it run over night

 

[Droneshooter]

How would I clean new vinyl tubing before it's safe to use for my tank