Zimmerlin round manholes
Round manhole covers
Non-pressure
with O-Ring
Round manhole
pressure +8/-1 bar
Round manhole covers
pressure +10/-1 bar
Round manhole
pressure +8/-1 bar
RPDC-3A
Round manhole
pressure +8/-1 bar
with a flat cover
Round manhole
pressure +1/-1 bar
Round manhole covers
pressure +6/-1 bar
with cone