FAQ

Are FIBERTOP manhole covers water-tight?

Due to the way of the support contact and the reduced tolerance, the standard M.M.’s FRP manhole cover guarantees a good water tightness.

Upon request, M.M.’s FRP manhole covers may include an O ring gasket which makes the junction tight onto the frame as well as other gaskets for the support ant lifting areas. With this arrangement gas and liquid proofing is greatly ensured making the system practically sealed.