Septic tank aerators?

Seems like mine is dead. Wouldn't it make more sense to have the motor mounted above ground where the humidity would be lower? Instead it is hanging in the hole.
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Yes. Here's one that is top mounted.
https://www.septicsolutions.com/septic-parts/septic-tank-aerator
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On Thursday, March 21, 2019 at 7:29:24 AM UTC-5, CRNG wrote:

Yeah, there seem to be two different types of aerators. The type I removed is a motor which hangs vertically and spins a hollow shaft in the liquid. The hollow shaft has an agitator on the end with holes in it. As the shaft spins air bubbles are ejected into the liquid as air flows down the hollow shaft.
The other type of aerator is an air pump and hose scheme similar to an oversized aquarium bubbler system.
I don't know how they compare in efficiency or reliability.
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On 3/21/2019 10:08 AM, Davej wrote:

Interesting to know about aerator septics as I had never heard of them. I have a regular anaerobic septic and have seen neighbors forced to make upgrades when they sold their houses but not to aerobic but putting in expensive chemical treatment beds. Wonder if they could avoided this by going aerobic?
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On Thursday, March 21, 2019 at 11:34:59 AM UTC-5, Frank wrote:

I don't know but this house was sold to me and it is obvious that the aerator has been dead for some time, so I guess the county did not inspect the septic system.
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On 3/21/2019 12:50 PM, Davej wrote:

I'm sure it depends where you live. My county in northern DE has piled on numerous rules since I moved into this house 45 years ago and I have been watching the hoops that three neighbors had to jump through in selling their houses. They would require a septic inspection including putting a camera through the system to check it out.
As I mentioned, 2 neighbors had to put in new $25,000 treatment systems which included the chemical treatment tanks to remove bacteria and heavy metals. Another had to put in a separate drain field for the effluent in the salt flush of his water softener. Wondered if the treatment system could have been avoided if aerator was put in. Aerobic systems are more expensive than anaerobic ones but more trouble free.
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On Thursday, March 21, 2019 at 1:49:50 PM UTC-5, Frank wrote:

The basic idea I'm reading is that a large level yard with 3 ft of good soil can use an old-fashioned anaerobic septic system. However if you have a smaller yard, or a yard that is not level, or a yard that has less than 3 feet of good soil above rock or hardpan then at a minimum you will need an aerobic system with an aerator. Apparently the motor-shaft type aerators are what came first and the air-pump type aerators are the more modern approach. Some systems have a chlorinator on the final tank, and I guess there are even more complex systems.
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On 3/26/2019 1:44 PM, Davej wrote:

My fields are evaporation fields so it might be beneficial. I needed an alternate field first year we moved in when the original field got wet and put in the second field. I think it is a requirement today. I had to switch between the fields now and then when our three sons were here and toilets were not low flush. Now with just wife and I, we are on the original field for maybe the last 10 years. The next door neighbor that had to put in expensive treatment chemical tank is on a leach field not to far from his neighbors well in the back.
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