My friends needed a septic system that pumps uphill. Their house is at the low point on their plot and for years the septic system has not yet worked well. They needed to fix it so that they can have toilets that actually flush within the rain. An unusually wet Spring season has accented the issue so that they made a decision to spend the sizable amount of cash to correct the problem.
The device consists of the regular septic tank then a septic effluent pump tank then a distribution tank located at the top from the hill. The new septic tank needed to be placed in order to not disturb the previous tank so the existing system could still be used during construction. The pump tank needed to be located slightly underneath the septic tank to ensure that gravity would flow the waste water with it. The septic tank effluent pump sits inside the pump tank and pumps this type of water for the distribution tank high on the hill. From that point, this type of water will drain to the field lines by gravity.
My job was to connect the sump pump and alarm to the electrical supply. The alarm is needed through the local sewer codes to create a visual and audible alarm should the water level inside the pump tank exceed a certain level. This gives an early warning that there is something wrong with the sewer pump.
For reliability, the alarm should have its very own separate circuit. If the alarm was powered through the supply to the pump and also the breaker tripped for the pump, there could be no alarm. I installed the alarm inside the house so it can easily be seen and heard as suggested from the local plumbing inspector. I connected the wires straight to the alarm panel and ran all of them inside conduit so that it would be tamper resistant.
This house had an exterior breaker box originally installed for that AC addition. This box had a couple of extra spaces in it that made a perfect spot to pull power for that new septic pump system. I used a 20 AMP GFI breaker for that sump pump service as well as a 15 AMP standard breaker for that alarm. Their local ACE hardware had the right breakers for this particular older Square D box.
The most labor intensive part of the job was running the underground wires through the box at the front of the home towards the septic field behind the home. Most of the trench had to be dug by hand as a result of close proximity from the AC compressor, flower beds and a sidewalk. Most of the trench was dug from the plumping contractor using his backhoe.
A 12 gage wire was run for your pump and a 14 gage wire for the alarm. The wire used was rated for direct burial so conduit had not been needed. I have done run conduit for additional protection from the box down to the base of the 24 inch qiggkp trench each and every end of the wire. I used exactly the same 14 gage direct burial wire to increase the float wiring through the alarm unit towards the field.
On the pump tank, I installed a weather-resistant single 20 AMP outlet on a 4×4 post. Here is where the Myers Sewer pump is plugged in. The plug provides the required local disconnect considering that the breaker will not be within sight from the pump tank. The float wiring was placed in a separate junction box on the same post.
A bit of conduit was cut to fit to the neck from the tank so the cord for the septic pump and the alarm float wiring would be protected. The conduit ends slightly beneath the outlet for the septic pump.
Our local inspector was happy with the facts and water proofing. I used a compression fitting in the bottom of every conduit run and sealed it with silicone as well to avoid critters from finding their way into the junction boxes.
I tied a length of rope towards the sump pump, fastened the alarm float for the outlet pipe and carefully lowered the sewer pump into position. I secured the free end of the rope to one of many lifting lugs of the sewer pump tank. Now the plumbing contractor can finish his work to obtain their system operational. I am sure they are going to enjoy having the capacity to take baths and flush the toilet even if it rains.