It sounds to me like there is a stoppage in the field pipe somewhere. The pump is filling it up, then you get the back pressure.
I suspect you have the two tank system with a remote drain field or mound. Essentially settled water goes from the large tank into the one where the sump pump is located. The sump pump then does its job of carrying off the water as it is triggered. This type of sump pump typically has an alarm on it if the water level rises above where the pump should kick in.
Have you recently had any heavy equipment or trucks go over your line which may have crushed it?
Were it me, I'd do a temporary repair to necking down the pvc from the pump to a garden hose coupler and then running the water in various places in the yard until the problem can be found. However, you may have a problem with the garden hose freezing on you.
The county health department should have a copy of your approved septic system. It would be very handy when you get a professional out to look at it. They may be able to dig out the outgoing line to see if they can find a problem. For example, they push through wire and it stops X feet away. Knowing where the line is they can then come close to being over the potential problem.
I suspect you have the two tank system with a remote drain field or mound. Essentially settled water goes from the large tank into the one where the sump pump is located. The sump pump then does its job of carrying off the water as it is triggered. This type of sump pump typically has an alarm on it if the water level rises above where the pump should kick in.
Have you recently had any heavy equipment or trucks go over your line which may have crushed it?
Were it me, I'd do a temporary repair to necking down the pvc from the pump to a garden hose coupler and then running the water in various places in the yard until the problem can be found. However, you may have a problem with the garden hose freezing on you.
The county health department should have a copy of your approved septic system. It would be very handy when you get a professional out to look at it. They may be able to dig out the outgoing line to see if they can find a problem. For example, they push through wire and it stops X feet away. Knowing where the line is they can then come close to being over the potential problem.
