Thunderfan
New member
I thought the emergency was just in case of well, an emergency and stayed dry the remainder of the time.
Overflow hole plugging
- Thread starter Thunderfan
- Start date
SGT_York
New member
It can also be used during Bean Animal startups when the overflow is waiting on the siphon to purge the air.
On a Herbie, Uncle and I disagree on what is safe to me safe means having a screen and lid on the overflow that prevents any snails or light (algae) near the siphon lines. To me that is far safer than keeping the emergency dry and hoping that only one snail finds its way to your overflow.
I have also had both my siphon and open channel stuck at the same time with snails. Thankfully I had enough capacity with my second open channel so it was not a disaster. Since the lids I've never had an issue and the maintenance has been dramatically reduced.
On a Herbie, Uncle and I disagree on what is safe to me safe means having a screen and lid on the overflow that prevents any snails or light (algae) near the siphon lines. To me that is far safer than keeping the emergency dry and hoping that only one snail finds its way to your overflow.
I have also had both my siphon and open channel stuck at the same time with snails. Thankfully I had enough capacity with my second open channel so it was not a disaster. Since the lids I've never had an issue and the maintenance has been dramatically reduced.
uncleof6
Active member
That is what it is for yes. In case the main siphon occludes, the open channel occludes, or both. Scenario: Siphon occludes. Dry emergency kicks in. Gurgles to alert you, and you fix the problem. Or continues to gurgle till you fix the problem a month later...
The open channel is the final line of defense.
Siphon occludes. Dry emergency kicks in and then occludes: Open channel trips to siphon due to water level rising to cover the air inlet for the open channel. (Which is higher than the inlet to the dry emergency.) No flood. It is the open channel that is the final emergency fail safe. It should never trip to siphon mode unless both the siphon and dry emergency have serious problems.
Really to get a flood from the system, you have to have two fully occluded lines, and a partial third line occlusion, unless it has not been set up right. or you followed bad advice.
Any changes in the trip order, or logic involved, and the system will not function properly. It is not necessary to understand any of this to put the system together and run it properly and safely. It is, however, necessary to have a very solid understanding of how the system is designed, how it is supposed to run, and what causes it to fail in order to advise on design criteria, as well as safe modifications to the system.
