DIY to prevent backflow

[LaRZuZ]

Hi guys, hope you guys can give me some ideas to DIY.

Possible Problem: If return pump suddenly shuts off, the outflow tube which is submerged in the tank will have a suction action causing the water to flow back into the sump. The sump will not be able to take the amount of water and overflow the sump.

Question: Is there anyway to stop the above action for occurring taken into account the possibility of pump shutting down due to power failure or pump failure.

I have faced this problem before, some years back.. I have been thinking about this since I started back my marine.. Hope you guys can enlighten me with ideas..

Thanks

[triggerfish]

hi, just need to drill a small hole on the return pipe (or u called it the outflow tube) slightly below the waterline, so as once the water level in your main tank drop to the level (as indicated by the small hole) siphon will break.

upon creating the hole just switch off all pumps so see whether that level is feasible to you or not. hope it helps!

Hi guys, hope you guys can give me some ideas to DIY.

Possible Problem: If return pump suddenly shuts off, the outflow tube which is submerged in the tank will have a suction action causing the water to flow back into the sump. The sump will not be able to take the amount of water and overflow the sump.

Question: Is there anyway to stop the above action for occurring taken into account the possibility of pump shutting down due to power failure or pump failure.

I have faced this problem before, some years back.. I have been thinking about this since I started back my marine.. Hope you guys can enlighten me with ideas..

Thanks