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You don't, you replace it. Dig up the old, lay new pipe and gravel and cover. You can also try the natural bacterial cleaners, such as the all-natural advanced formula Septic-Helper 2000. Some treatments have the natural bacteria that work outside of your septic system and in your drain lines and drain field.
No, they overflow because they aren't maintained properly. They need to be pumped out periodically to remove the sludge that accumulates in the bottom. You also need to be careful which cleaners, toilet tissue and grease you dump in. By the time it overflows, you've probably damaged your drain field and this is expensive to fix.
Most of the one's I have run across do not have an overflow. Mainly used for disposal, dumping out drinks, etc, not for washing so overflow not really an issue. Also, most are stainless which do not lend themselves to an overflow drain.
Usually. Going through the overflow drain gets you straight into the drain without having to make the sharp bend in the tub drain. There could be a trap that comes apart in the drain underneath if it is accessible.
Ideally 1/4" per foot minimum
The overflow is built into the sink, it is not part of the drain. If there is no overflow, you can not add it.
You don't, you replace it. Dig up the old, lay new pipe and gravel and cover. You can also try the natural bacterial cleaners, such as the all-natural advanced formula Septic-Helper 2000. Some treatments have the natural bacteria that work outside of your septic system and in your drain lines and drain field.
No, they overflow because they aren't maintained properly. They need to be pumped out periodically to remove the sludge that accumulates in the bottom. You also need to be careful which cleaners, toilet tissue and grease you dump in. By the time it overflows, you've probably damaged your drain field and this is expensive to fix.
Most of the one's I have run across do not have an overflow. Mainly used for disposal, dumping out drinks, etc, not for washing so overflow not really an issue. Also, most are stainless which do not lend themselves to an overflow drain.
Usually. Going through the overflow drain gets you straight into the drain without having to make the sharp bend in the tub drain. There could be a trap that comes apart in the drain underneath if it is accessible.
In my experience, I would say no. Several reasons can prevent the overflow from working. Since the overflow of the sink is rarely used it has a tendency to be blocked at the lower portion where the sink joins the drain pipe. During normal use and over years the holes in the sink drain at the point where the overflow and drain pipe meets has a tendency to clog making the overflow drain slowly. You can notice this when your sink drains with a "gulping" sound. You can test the overflow drain and see how obstructed it is, but do it slowly and do not turn on the faucets on full.
Sinks and tubs must drain to the septic tank.
Yes, the gasket between the overflow pipe and the tub can go bad, or it can leak around where the pipe is attached to the drain.
This is called a direct drain and they are not easy to find compared to tub drains that drain via the overflow pipe. Watco and Dearborn Brass both make kits to do this, available in the US.
It is connected through the main house drain to septic tank.
Its your bathtub drain.
No