How do I setup a battery-powered backup air pump alongside a powered one?

So I bought a air pump that plugs into a wall port and turns on only when there's no power. Perfect. EXCEPT, I want it operating the same bubblers that my powered air pump will be operating when there is power.

I need this switch-over to happen automatically without me being home.

Initially, I figured I would set it up with both pumps joined by a Y tube connector with check valves between both pumps and the Y connector. Then the air hose runs down to the bubblers in the tank.

Will this work or will each pump be sending air to the other non-operational pump? Do check valves prevent air as well as water from going into the pumps in which case my idea should work?

Thanks for any help you can send me! If you have a better solution, please let me know your setup and what I need to buy/make/etc.

 

the y is a good idea, I would suggest a check valve before the y begins in each pump so air doesn't get back to one pump when the other is working.
you can also send individual tubing into aquarium from each pump, they will still work individually depending on the electrical power

 

Check valves will not let water nor air go through it backwards. I just tried and now feel a little light headed, haha.

 

I use two check valves in series on my siphons. I've found over a long period of time a single will slowly allow air to enter the system.

In the scenario you're describing, the losses would be insignificant. Go for it.

 

Sweet! This is great feedback! I'll proceed with my plans! Thanks.