buzzsaw
October 12th, 2005, 06:56 AM
I suspect it is not ideal, but this is the current setup I have. Question is, is it ok or do I need to change something in its design? House is for a family of 4 and has 3 WC and all the other typical plumbing needs.
I currently have all drain lines (grey and black) leading to a basement basin where I plan to install either a sewage or grinder pump to pump it up and out to my septic tank; about 60 feet from the house. From there it is pumped up hill feet to a drain field about 150 away.
The questions/issues I have are as follows:
1) The pipe from the basin to the septic tank is 2" diameter. It has about 10' of head and then slopes down at least 1/4" per foot to the septic tank. Do I have a major issue with this size pipe if it is not a 4"? I am in northern MN and freezing is a concern. However, the pipe is buried at between 3-5 feet below the ground and I have 4" of foam insulation over it except near the house where it is around 2+ feet deep for about a 10' run.
2) I still have the option to re-route my grey-water drains on the upper floors to the 2" line via gravity drain and bypass the basement pump all together. (However, I don't think I should do this for the black water from these floors going into a 2" pipe. Agree?) Should I do this? Or is it better to try and keep more flow going in my smaller 2" pipe to avoid potential freezing issues? I realize this will cause my pump to cycle more frequently, but perhaps it is the lesser of two wrongs (cycling pump vs. smaller drain line) without increasing my 2" drain line to 4".
3) In any of these scenarios do you recommend one type of pump over another? Grinder vs. sewage
I currently have all drain lines (grey and black) leading to a basement basin where I plan to install either a sewage or grinder pump to pump it up and out to my septic tank; about 60 feet from the house. From there it is pumped up hill feet to a drain field about 150 away.
The questions/issues I have are as follows:
1) The pipe from the basin to the septic tank is 2" diameter. It has about 10' of head and then slopes down at least 1/4" per foot to the septic tank. Do I have a major issue with this size pipe if it is not a 4"? I am in northern MN and freezing is a concern. However, the pipe is buried at between 3-5 feet below the ground and I have 4" of foam insulation over it except near the house where it is around 2+ feet deep for about a 10' run.
2) I still have the option to re-route my grey-water drains on the upper floors to the 2" line via gravity drain and bypass the basement pump all together. (However, I don't think I should do this for the black water from these floors going into a 2" pipe. Agree?) Should I do this? Or is it better to try and keep more flow going in my smaller 2" pipe to avoid potential freezing issues? I realize this will cause my pump to cycle more frequently, but perhaps it is the lesser of two wrongs (cycling pump vs. smaller drain line) without increasing my 2" drain line to 4".
3) In any of these scenarios do you recommend one type of pump over another? Grinder vs. sewage
