Plumbing Question

Based on the size of the septic tank, I am guessing that this pump is for single family residential use. I also assume that the tank is adjacent to the house and that the tank will separate the solids and floatables from the effluent. My finally assumption is that the treatment location is 200 meters away.

The previous responses to your query are correct, the diameter and material of the pipeline as well as the difference in elevation is also important to know. Also, what country and what the water supply is has some bearing on the answer. Finally, what size is your house and how many household members are living there?

Putting these issues aside for the moment, here are some other considerations:

Peak moment demand of water in a house rarely exceeds 12 to 15 gallons per minute. This is typically when someone flushes the toilet while the laundry is being done.

Average daily use can be about 100 gallons per person per day or about 150 gallons per day per bedroom. If you are in a portion of the world that is highly developed, or poorly developed or if your culture / water availability/ is such that daily baths are not taken, clothes are worn more than once before being laundried, etc. then water use would likely be less than what I have indicated.

It is best to have the pump cycle on the average of about 10 to 15 times per day, but it should have the ability to pump at the mentioned maximum rate should a need arise.

Do not connect your foundation drains or roof downspouts to this pump.+

If your septic tank location is as I assumed, you will not need a grinder pump as you will just be pumping fluids to the treatment location. However, if my assumption is wrong, you will need a grinder pump. A grinder pump grinds up solids so that they do not plug the piping and breakdown faster in the treatment system.

Non-degradable floatables usually have to be removed mechanically or by hand.

Many companies such as Goulds, Hydromatic, Environe, Etc. manufacture a system that contains the pump, wet well, pre-wired harness, floats, etc. that can function well within an envelope of pressures and flow rates.

Unfortunately, because you did not provide most of the necessary information to properly answer your question, you are going to have to determine the answers to many of the questions asked in the responses. If you can determine those answers and provide the data, I am sure a salesman would be happy to make some suitable suggestions to you as to the appropriate pump.