A plastic sewage well consists not only of a riser pipe, a base and a manhole, but also of many different accessories. These include telescopic pipes, covers, hole cutters, channel steps and in-situ inserts and seals. It is this last element that we will take a closer look at today. Find out what an in-situ seal is and how it is used in external sewage systems.

Check the seals "in situ" at the Onninen wholesaler
What is an in situ gasket?
The Latin "in situ" means "in place". This phrase can be found in medicine, archeology, construction, chemistry, computer science, biology, environmental protection and - of course - hydraulics! In sewage systems, the term "in situ" refers to a type of drilled connection outside the well chamber. An inlet pipe is usually connected to a sewage well, septic tank and other tanks. To obtain a perfectly tight connection, an in situ gasket is needed, also called an inlet gasket or inlet flange gasket.
It is installed before the pipe is installed, in self-drilled or ready-made, prefabricated holes. A properly selected and installed product ensures absolute, long-term tightness of the connection. Made of high-quality, flexible and durable plastics, in situ seals are characterized by increased resistance to atmospheric factors, ozone and UV radiation. They are easy to install, can be easily stretched and work very well in both high and extremely low temperatures.
Application of in situ seals in external sewage systems
The in situ seal is used to seal and secure the connection between a pipe and a tank, e.g. a sewage or water meter well, a domestic sewage treatment plant, a rainwater tank, a sewage pumping station, etc. Thanks to the use of the in situ seal, the liquid (often contaminated) does not escape from the tank or penetrate its interior. The special shape of the profile and the stresses occurring in the seal translate into many years of tightness of the connection. This is of great importance for environmental protection, the safety of the tank users and the efficiency and durability of the installation.
In situ seals at the Onninen wholesaler
In the Onninen plumbing and electrical wholesaler you will find only high-quality, proven seals and in-situ inserts for plastic manholes . Our products will allow you to make an additional inlet from a PVC/drainage pipe to the shaft pipe of a sewage manhole. We cooperate with the most valued manufacturers of plastic installation systems, such as Kaczmarek and Wavin . Each product available in our online store is accompanied by a detailed specification, including parameters such as dimensions (e.g. in-situ seal 110 , in-situ seal 160 ), material of manufacture or purpose.
Not sure which in situ seal will work best in your planned connection? Contact us! We will be happy to advise you. Discover also other product categories essential in the construction of modern external sewage.