Soil Vent Pipe

Soil Vent Pipe Information & The Regulations

Martin Smith speak about the Soil Vent Pipe Regulation which includes plenty of useful information and is this a job for an emergency plumber. Just below are 14 common questions asked but also answered.
Soil Vent Pipe

  • Internal soil stack vent information?
  • What is a soil vent pipe?
  • What are the soil vent pipe regulations?
  • Cast Iron soil vent pipe v’s plastic?
  • What soil pipe tools do I need to fit a soil stack?
  • Who invented the soil pipe stack?
  • History of soil vent pipe stacks?
  • What is the minimum requirement for a soil vent above the window or roof?
  • Where is the best place to fit a waste outlet to a soil vent pipe?
  • Should there be a rodding point on the soil vent stack?
  • Which trade is required to fit a soil stack?
  • Soil pipe air or water test?
  • How to solve a blocked soil stack?
  • Where can I buy cast iron pipe to fit a soil stack?

Internal soil stack vent information

Some builders and plumbers when fitting a soil stack find it very difficult when trying to follow simple rules. Here we include all the best soil vent pipe information which we would like to share. The only time that this becomes a job for the emergency plumber is when the pipe is leaking or letting out foul air. If it is blocked then it is a job for the emergency drainage engineer.

What is a soil vent pipe

A soil vent pipe is a pipe that take all the waste from the toilet, bath, basin, sink and all other types of soil wastes to an allocated drain but also vents above the house in a safe way to make sure there are no un-wanted fumes and gases.

What are the soil vent pipe regulations

The most important regulations when it comes to the soil stacks and vent pipes are that you always keep all fitting to the building regulations. Some of the pointers as shown in the picture are having an access point below above the ground in order to clear the drain when in a situation that there is a blockage.

Cast Iron soil vent pipe v’s plastic

Cast Iron is an old and more expensive way of fitting a soil stack. Once plastic came along it was found that there was money to be saved in the building industry. Plastic has been seen by some as cheap and nasty but by the results it is found that plastic is not so cheap and nasty as it seems. The only problem is with the plastic is that it is found to discolour over time but cast iron also does and has to be repainted. Unless the soil pipe is being fitted in a heritage site then we find plastic is the way to go for and is the best all rounder but so much easier to fit also.

What soil pipe tools do I need to fit a soil stack

If your thinking about fitting a new soil pipe from the old cast iron pipe then firstly you need to make sure you are working in a safe environment. It is found that there are so many workers are taking soil stacks away from building but also injuring themselves in the process. When putting up a scaffolding or a set of ladders, you first of all need to make sure that the scaffolding or ladders are completely safe. If you are afraid of heights and suffer from bad balance then this may not be for you. It can take some of the most strongest of people, but being over weary can have its effects such as weakening of the muscles. Being able to work at heights has to be natural to some, not being scared of heights can also have it’s negative effects such as being in a unsafe situation, which is the reason to why it is so important to be safe. Make sure there is nothing close by that can be damaged and start to break away at the joints but also be sure to follow all health and safety rules at all times. The soil stack may come down with a loud noise but it is always best to try and break the soil pipe up once on the ground if this is possible. You will need a hammer drill, big lump hammer, small lump hammer and a hacksaw.

Who invented the soil pipe stack

In 1785 an engineer called Sir Thomas Simpson invented the bell and spigot joint which was also included to fit with the cast iron pipe to help make soil stacks and was introduced to London in the late 1700’s and early 1800’s.

History of soil vent pipe stacks

Since the introduction to the cast iron pipe in the late 1700’s it has only been recently in the last 60-years that we have had the plastic soil stack revolution.

What is the minimum requirement for a soil vent above the window or roof

The minimum a soil pipe should be above an opening area is 100mm. The reason for this is so than there are no foul or gas entering the house so that there are no illnesses occurring.

Where is the best place to fit a waste outlet to a soil vent pipe

The best place to fit a waste pipe is anywhere on the soil stack as long as it is not within 200mm below of the toilet outlet as shown in the picture.

Should there be a rodding point on the soil vent stack

Within the last 15 years or so, the latest soil vent pipe regulation have been so that the rodding point is fitted above the ground so that there is access to clearing or unblocking the soil stack. In the past, there has been blockages and no way to get the machine down to unblock.

Which trade is required to fit a soil stack

To fit a soil stack, all you need to do is proof that you are competent. If your unable to proof that your competent you can also have the council come out to investigate and to pass the soil stack off as safe to use. Both a builder and plumber would be the closest type family to construction when it comes to soil vent pipes. If you was looking for a complete house or extension then you would call a builder when it comes to the soil vent pipe but when there is just a straight forward replacement then you would call the plumber.

Soil pipe air or water test

When making sure your soil stack is in good working order, then the correct test you would want is to make sure an air test is done. This will ensure there is no issue within the house for any foul smell. The only other way to detect a foul smell and where it is coming from is a H2S device with the pumping equipment. As long as the drains have been fitted correctly, which includes the correct vents or Durgo valves, then there should be no reason for a smell to occur, unless there are some alternative problems with the appliances or fittings.

How to solve a blocked soil stack

To solve a blocked soil vent pipe, what you will need to do firstly, is to take the cap off the soil stack. Be very careful when undoing the cap as to the soil/water pressure there may be behind the soil stack. If you have no experience with soil stacks then leave this to the professional plumbers or drainage engineers. Once the cap has come off, the next steps would be to use a machine or a drainage rod and place it in to the soil vent pipe and start to work at the blockages. If the blockage does not unblock, the next step would be to either contact an emergency plumber or to call an emergency drainage engineer. You can call either engineer by the contact number above.

Where can I buy cast iron pipe to fit a soil stack

You can buy cast iron pipes from a company called Drainage Online and the best way to find them is by going online and typing in to the search engineer ‘Drainage Online’. If you want plenty more information about cast iron pipe, then read this article ‘Cast Iron Plumbing‘.