There are still a lot of apartments and houses where water drainage system made of metallic elements. At the present time, many are trying to replace the bulky structure at a practical PVC. And here the question arises, how to put together a cast-iron pipe with an old plastic sewage. In this case it is necessary to consider all the options available. When choosing the best method of communication must take into account the availability, diversity of material composition and rate of deterioration of communication.
methods compound
There are different methods of joining old cast iron pipe with plastic, which allow the use of auxiliary means, such as sealant, rubber gaskets etc. Depending on the state of communications, some processes require a combination of several different connection options elements. Selection method will also depend on the integrity of the pipe socket. Before you get started, you need to find out the specifics of each method.
Using a rubber gasket
This is one of the most popular types of connection of cast iron pipes. The rubber gasket has high ductility so minimizes distortion product. The cost of laying low, which also adds a plus when it is used. Apply the rubber gasket can be used only when the socket is stored completely and has no defects. The life of a rubber sealant of 8-10 years.
Gasket set in the following manner:
- Since the socket is removed dirt, rust, inside processed sealant.
- From outside the airtight seal is also processed material, then inserted into the socket.
- The remaining end of the rubber seal is inserted into the plastic part, then they are interconnected.
- All joints are additionally treated with a sealant.
The gasket must be replaced after the expiration date. If this is not done, there will be leakage associated with loss of elasticity and tightness of the joints between the liner and the socket. The cuff has a complicated configuration. It is performed with a plurality of projections extending over the entire surface. This allows maximum tight connection wire cast iron pipe with a plastic.
Ate for some reasons refused without pipe socket, the compound can be hold using a plastic adapter, but the degree of efficiency will be lower. Installation is performed as follows:
- Deletes the failed sewage station, is clean cut and processed sealant.
- Inside the socket adapter is installed with finished edges with silicone sealant.
- The cast iron pipe installed plastic adapter in the form of a knee or flasks. The depth of the pipe joint and the adapter must be at least 50 mm.
- The last stage is set in the plastic part of the adapter. When the transition is used rubber seal. All joints are processed hermetic structure.
Installing the adapter does not require the use of special tools, it is fast, without too much difficulty.
Compound press fittings
Press-fitting - the adapter having a thread adapted to the cast iron pipe at one end and the other plastic. High reliability make the use of a compound of fitting a very effective method of joining diverse construction elements. Work carried out in several stages:
- Pdgotovitelnaya work cast iron water main. For this purpose the pipe is cut, trimmed free of dirt and rust, deburred.
- Applied to the prepared cut lube or sealing tape.
- Carried threading depth of not more than 50 mm.
- Press fitting neatly wind on the thread. Set it manually as an adjustable wrench may damage the fitting and just burst. If, during the inspection of the pipeline joint give a small leak, then tighten it can have the key.
- On the other hand it puts a plastic tube with a crimp ferrule.
- Conduct additional sealing joints.
Be aware that you can not use PVC fittings for metal surface.
Crimping reeling
This is one of the most common ways to connect to the sewer pipes of cast iron to plastic. This method is not applicable rubber gasket. The joints are sealed by means of flax tow. To reinforce the joints used cement. The method is used when the walls between the pipe has a clearance of 3-5 mm. The method is carried out as follows:
- At the end of the plastic pipe, which is inserted into the socket of the metal pipe wound from flax tow in several layers.
- The plastic part to be connected with the iron, is inserted into the socket until it stops.
- By using a screwdriver or wide spatula preroll compacted into the gap between the metal tube until it stops. This is the method of embossing.
- Next, the remaining part is filled with cement mortar or glue PVA and allowed to dry.
- After one day, the mixture is completely dries up and is ready for operation.
Crimping method is considered reliable and proven. The service life of the compound up to 50 years.
The use of silicone sealant
If the gap between the walls of the pipes are not greater than 2 mm, the gap can be repaired conventional silicone sealant. A method for efficient and does not require any special financial and physical costs. The work is as follows:
- The surface iron of the socket is cleaned from dirt and rust.
- At the end of a plastic pipe plumbing wound yarn is then inserted into the prepared metallic socket 8-10 mm.
- The space is filled with the silicone mixture until complete filling of voids.
Silicone dries in 3-5 hours, then you can safely use the sewer.
The use of a flange
This method involves the use of the fasteners. In addition, the required welding equipment. It is understood that the work associated with solder realize not everyone can. If you are in the presence of the necessary tools and equipment, which is able to manage, while work is carried out in several stages:
- Cut and trimmed pipe cast iron pipe.
- metal flange joined by welding.
- When the metal cools on the assembled structure is put crimp sleeve.
- Further coupling shifts toward the side of the flange and secured compound.
- Between the flanges fit into the rubber seal.
- Then the flanges are joined and bolted.
Such a method of joining diverse materials often used during repair work of large diameter pipelines.
These methods can be combined to increase the reliability of the joints. At the same time, you can use the following methods:
- The rubber gasket with silicone sealant. At the beginning of the adapter is installed. Further, the metal tube is placed the plastic and fill the gap silicone composition to the full capacity. Rubber gasket in this way can be used with Crimping linen reeling. This is especially effective when connecting the adapter corrugated iron from the toilet to the sewage system. Joints in this embodiment are processed sanitary silicone.
- Crimping method is often combined with a silicone sealant. Silicone is used instead of cement mortar which is fed into the gap between the walls of the tubes. In this case, hardening is much faster and can use the sewers after 5 hours of work.
Observing the rules of the compound of iron and plastic elements in the collection of the sewer system, it is possible to carry out high quality work independently. This will save time and money on call professional locksmiths.
