* No leakage :
Conventional products face aged rubber packing and loosened clinching bolts which cause leakage. However, this product has no leakage so that there is no failure after installation.
* Excellent corrosion-resistance :
The bellows material is stainless steel. Therefore, it has no corrosion and supports clean water supply.
* Simple construction :
The stainless material is light-weight stainless steel with excellent corrosion-resistance. It can be buried without any separate manhole.
* Excellent expansion and absorption :
The product is able to support the expansion and absorption in the shaft direction and perfect absorption without leakage in the ground sinking condition. Therefore, it supports seismic design.
* High pressure-resistance :
The ceiling of the bellows molded with TIG welding can endure high pressure so that there is no leakage.
* Economy :
If a design is made with a long expansion length, it is possible to reduce the number of expansion joints. Therefore, the cost of construction can be saved.