FAQ

Can the sleeves be removed after installation?
Yes, the sleeves can be removed after installation.

When should the hydrophilic rubber be used?
The hydrophilic rubber is used for penetrating water or on especially rough surfaces. All Circum systems have been tested without the hydrophilic rubber.

What material are the stainless steel sleeves made from?
We use 1.4404 stainless steel for the stainless steel sleeves.

What material are the rubber seals made from?
We use EPDM for the rubber seals.

Can the Ascopa rehabilitation hose be damaged during pipe cleaning?
No, the EPDM has sufficient thickness and a shear hardness of 60.

Can the stainless steel sleeves be made for potable water or from NBR?
We would gladly provide sleeves suitable for potable water or made from NBR on request.

What is the best way to store the sleeves?
The sleeves should ideally be stored upright in a dark, dry location.

When should I use one end flared and when should I use both end flared?
Sleeves with one end flared can be used for serial installation. Both ends flared sleeves are used for single installation

Does Obduramus ship internationally?
Yes, we will gladly ship to your requested location, including internationally.

Does Obduramus offer training for handling the sleeves?
Yes, we offer training for our products either on a test site or via video conferencing.

Do the Circum systems have DIBt approval?
Yes, we have had DIBt approval since 2020.

Can the Circum systems corrode?
No, the fully stainless steel sleeve is manufactured using 1.4404 stainless steel so corrosion is not a problem.

What happens when a standard-sized sleeve does not fit your damage?
We would gladly produce a sleeve for your special type of damage on request.

Are special packers required for sleeve installation?
No, any packer with a wheelset can be used to install the sleeves. Please speak to us about our packers which have been specially designed for the Circum systems.