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You need at least a 3 in. pipe -- shower is 2 in. pipe
Storm piping.
That depends alot on your location and what codes your jurisdiction has adopted. From the 2006 International Plumbing Code, "water service pipe and the building sewer SHALL be separated by 5 feet of undisturbed or compacted earth." There are exceptions, 1. "the required separation distance shall not apply where the bottom of the water service pipe within 5 feet of the sewer is a minimum of 12 inches above the top of the highest point of the sewer and the pipe materials conform to Table 702.3. 2. water service pipe is permitted to be located in the same trench with a building sewer, provided such a sewer is constructed of materials listed in Table 702.3. 3. the required separation distance shall not apply where a water service pipe crosses a sewer pipe, provided the water service pipe is sleeved to at least 5 feet horizontally from the sewer pipe center-line on both sides of such crossing with pipe materials listed in Table 605.3, 702.2, or 702.3." So, no, there is no minimum separation IF the materials you are using bear the correct ASTM #. (Your building sewer pipe will probably have ASTM F 891 stamped on it.)
You must first connect a 1/2 inch PVC pipe to the outlet for the regeneration fitting on the softner and run this pipe outside and trench to the sewer drain and tie into sewer drain. The sewer drain will then flow the brine regenerater fluid to the septic tank.
A gap in the base of the sewer line opens up and a vacuum in the sewer is activated. It sucks the stuff in the bowl down into the septic tank, and then blue sanitizing fluid comes out in place of water and rinses out and cleans the toilet bowl. (About 2 liters, or 1/2 a gallon, of blue fluid is used)
I think the standard is a 4-5" pipe for toilet exhausts. To use a 2" pipe is asking for trouble. Friends of mine have the toilets that grind the waste in a box behind the cistern before it is flushed away. They both have had no end of trouble with the systems which grinds and flushes goes away through a standard size 22mm copper pipe to the sewer line. It is one thing to 'economise' and put up with the inconvenience of the smell and stuff like that - undoing the grind box to get to clogged blades - and there is the costs of "doing the job properly". I really advise you to do the job properly. Less hassle in the end.
In the end, yes. ANS 2 - By "the toilet pipe" -I'm going to assume you mean the drain . -The toilet drain in a small house is generally the main drain. All other drains are connected to it.
30 cm cheers broA kitchen WASTE pipe is 11/2" in many codes which is utter stupidity as the kitchen WASTE line does become reduced with grease and soap scum depositsIf the WASTE piping is going under ground to connect to the SOIL line (sewer piping) then 2" is strongly recommended as snaking an 11/2 line can be very challenging as the fittings are very short radius
Rock salt helps to kill tree roots that may be growing in your sewer line.You should try flushing 2 cups a week down your toilet.
Normally 11/2" DEPENDING on developed length of piping and fittings
Have a plumber snake out your drains.ANS 2 - Install a flapper valve section on the sink drain pipe so water can go down but not up - cheap and very easy to do.
1 1/2 or 2 inch. 2 inch is better because it give more venting for the drain.The proper size minimum size is 2" and ideally there would be an air break which is not always practical with a 2" stand pipe.The "vent" is installed AFTER the trap to prevent air locks and 2" is used to allow the Volume to flow freely