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Important Application Information

Cleaning sewer lines with NatureClean -33 is done from the downstream end. This allows the grease being knocked off the walls to flow down the line. If cleaning is started at the top of the line, there is a good chance a blockage could result if the grease cannot get out.

It is important to realize that although it does not happen very often, you may experience a backup in the first two or three weeks after you begin the program. The reason for this is that as the bacteria attaches to the pipe (creating a bio-film) and the bacteria. It begins eating the outside of the grease and behind it (between the pipe and grease). This loosens the grease on the pipe and it falls away off the walls of the pipe; it will want to flow down the line. If it cannot do this, it may cause a blockage.

As long as you're aware of this, it will be to your advantage if the backup occurs. First, it will not come as a surprise to you.. Second, it will prove that NatureClean - 33 is working. Some of our best customers over the years have been people who have experienced backups early in the program.

It is also important you to know that if you do get a backup it will be the last one you will ever have in that section of line as long as you stay on the program. These backups will not occur very often. Your chances of getting a blockage are less than 20 percent.


Will the bacteria can handle odors in sewer lines, lift stations, or ejector pits. The answer is always "MAYBE."

Very often the bacteria will improve or even eliminate an odor problem. There are bacteria in Naturclean -33 strictly for odor control. At times they work very well. There are other times when the bacteria will have no effect at all. Sewer system odors occur for many reasons such as flow, design, infiltrate and loading problems, just to name a few.

Other Concerns

Other times the bacteria may need help is when the pH is below 5.5 or above 9.5 and there is a BOD or COD problem. In addition, bacteria will not work below 55 or above 120 degrees Fahrenheit.

When these questions arise, you may need engineering or mechanical services. Call the office.

Identifying the Problem

It is a rare occasion when you have to treat more than 1,500 feet of line in order to eliminate any specific problem. Always bear in mind that our job is to give the customer a trouble free line for the lowest possible cost. Remember, no one is drinking the water in this line or taking a bath; it only has to run trouble free.

Here are some of the questions we ask to determine the necessary doses:

1. What is the diameter of the line? The line should be at least six inches, but eight inches or larger is more common. Most of the four-inch lines will be laterals that come from buildings to the main sewer.

2. How long is that portion of line that plugs up because of grease?

3. How many manholes are involved?

4. How many restaurants are on the line?

Typically, you will find the trouble in the line will manifest itself somewhere within 300 to 500 feet of a restaurant. This is because grease emulsifies at 140 degrees. Since a dishwasher’s rinse water is usually 180 degrees; it is common for the grease to go past the grease trap and directly to the city main. As the water cools, the grease congeals and plugs the line. Also, many restaurant owners know if they run enough hot water in the line, the grease will not be a problem for them. They just give it to the city and forget it.

The recommended way to treat a line such as this is to go to the manhole upstream from the restaurant and start the bug program measurement from there. If the restaurant line comes out directly into a manhole, it is still best to go upstream. However, in this case, start the measurement from the manhole at the restaurant. Usually, a 1,000 foot section treatment will be sufficient to cure the problem.

If there are no restaurants on the line, look for apartment complexes, schools, catering kitchens, and factories that process food, golf courses or any other place where people would be cooking. Some businesses such as furniture strippers, plating plants, or photo developers may discharge chemicals that kill bacteria.

Another problem area can be where the line has sagged because the ground under it has washed out. Or it could be a siphon that runs under a stream or road. These lines are especially annoying because they are difficult to clean. When heavy objects such as stones fall into the bottom they are hard to get out. This debris tends to trap large amounts of grease.

If it is a sagged line, the diameter of the pipe is reduced by the amount of the sag. For instance, an eight inch line with a four inch sag is effectively reduced to a 4 inch line. It is important that the line be as clean as possible because any grease buildup will only reduce it more -- with predictable results.

Since a good consistent bacteria program will eliminate the grease, you can achieve great results and become a real hero to the guys who have to clean this line.

Application of Bacteria

The line to be treated should be cleaned in 500 foot sections. Starting at the downstream section, the line is treated for four days. Then the next 500 foot section upstream is treated in the same manner until the entire line has received its initial dose (refer to your dosing chart for specific amounts). If you are treating more than 1,000 feet, it will be necessary to start the maintenance dose in the first 1,000 foot section while inoculating the upstream section. If you have any questions on dosing or procedures, contact the office before proceeding.

After the initial doses have been completed, maintenance doses begin. Your dosing chart shows the amount required for each 1,000 feet of line. You may treat up to one mile of line from one spot. Simply take the maintenance dose and multiply by 5.2.

We recommend that after the maintenance dose is begun, the customer inspect at least four or five manholes in the sewer line every two to three weeks to monitor for grease buildup. If after six months or so, if they find there is no grease buildup, they should be able to cut their maintenance dose by as much 25 to 50 percent.

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