Back Siphon through SeaSwirl?

[FrankB1]

With a power outage will I get water back through a Seaswirl?. Should a hole be drilled in elbow closer to the surface?

 

[ReefTiger]

I get backflow through mine. It used to be stopped with a check valve, but it since went bad. The hole idea sounds like it should work. If you try it let me know if it works (how big a hole you need).

8)

 

[Len]

It will back siphon. Either drill a hole or use a good check valve like the one Marine Depot sells. Most check valves suck IMO

 

[Anonymous]

The holes wotk fine. About 3/16" dia hole just under the running water line. I have never used a check valve, but it is one more thing to maintain and worry about.

 

[Anonymous]

I'm with Wazz.. - Keep it simple.

 

[Anonymous]

The holes will work fine. But remember to clean them regulary of they wil not work when you need them to.
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