trickle filters

[gecko]

hi
i have just upgraded to 5ftx2ftx2ft
its has not been without it problems :D
suddenly had a thought what if there is a power cut surley it will over flow my trickle filter as my 0c3500 will be useless with out the juice
what do you guys use

[david999]

do you mean overflow the sump

[Lavajava]

If you mean that it will siphon into the overflowing sump :eek: then you need to make an anti-siphon.

You can either fit a one way valve or as I have done drilled a small hole in the inlet pipe in tank and fitted a right angled washer jet just above the water line, this breaks the siphon once the pump a
has stopped.

Hope this helps.

[Tinca]

You could have the return from the sump above the surface of the tank water so there is no chance of a siphon!

If your sump has the capacity, you could submerge the return just below the surface of the tank water so that the water siphoning back will cause the level of water in the tank to drop, thus breaking the siphon!

[gecko]

thanks chaps any picutures of this i think i know what you mean

[simon garratt]

moved here.

[pavlo]

How does the water leave the main tank? Do you have a weir? or is it simply a tank connector high on the side of the tank.

[gecko]

i have a wier that takes water from the surface and just above sand bed.
thanks

[malc]

You could have the return from the sump above the surface of the tank water so there is no chance of a siphon!

If your sump has the capacity, you could submerge the return just below the surface of the tank water so that the water siphoning back will cause the level of water in the tank to drop, thus breaking the siphon!

Hi
Just to add a bit more here if i can help, i used to use a single entry point into the tank from the sump pump and relied on the hole/s drilled just below the surface to break the syphon, on my most recent setup i placed a T piece into the line just before a 90 degree elbow which went into the tank (depth below surface for water entry is not important), the main pressure pushed the flow around the 90 and into the tank as planned, the T was kept above the surface and the water that entered into the tank from this is quite minimal but when the power goes off the syphon is broken instantly, i am really pleased with this mod.
HTH Malc