Apparatus for delivering material to a pipe, the apparatus including: an inlet configured, in use, to receive a fluid flow; an outlet configured, in use, to deliver the fluid flow to a pipe; an instrument receiving location for, in use, receiving at least part of an instrument, and a rotatable access arrangement (110, 122, 133) for, in use, selectively providing or preventing external access to the instrument receiving location, comprising: a first rotatable member rotatable between a first position in which said first rotatable member provides flow communication between the inlet and the outlet via the instrument receiving location, and a second position in which said first rotatable member blocks flow communication between the inlet and the outlet via the instrument receiving location, and a second rotatable member rotatable between a first position in which said second rotatable member provides flow communication between the inlet and the outlet not via the instrument receiving location, and a second position in which the member blocks said flow communication between the inlet and the outlet not via the instrument receiving location, wherein the inlet and/or the instrument receiving location is configured, in use, to be connected to at least one elongate flexible conduit (402, 409). an inlet configured, in use, to receive a fluid flow; an outlet configured, in use, to deliver the fluid flow to a pipe; an instrument receiving location for, in use, receiving at least part of an instrument, and a rotatable access arrangement (110, 122, 133) for, in use, selectively providing or preventing external access to the instrument receiving location, comprising: a first rotatable member rotatable between a first position in which said first rotatable member provides flow communication between the inlet and the outlet via the instrument receiving location, and a second position in which said first rotatable member blocks flow communication between the inlet and the outlet via the instrument receiving location, and a second rotatable member rotatable between a first position in which said second rotatable member provides flow communication between the inlet and the outlet not via the instrument receiving location, and a second position in which the member blocks said flow communication between the inlet and the outlet not via the instrument receiving location, wherein the inlet and/or the instrument receiving location is configured, in use, to be connected to at least one elongate flexible conduit (402, 409). a first rotatable member rotatable between a first position in which said first rotatable member provides flow communication between the inlet and the outlet via the instrument receiving location, and a second position in which said first rotatable member blocks flow communication between the inlet and the outlet via the instrument receiving location, and a second rotatable member rotatable between a first position in which said second rotatable member provides flow communication between the inlet and the outlet not via the instrument receiving location, and a second position in which the member blocks said flow communication between the inlet and the outlet not via the instrument receiving location, wherein the inlet and/or the instrument receiving location is configured, in use, to be connected to at least one elongate flexible conduit (402, 409).