The bracket is just screwed onto a pre-drilled hole in he pipe, allowing a flexible hose to be connected. Numerous shut off taps are evenly spaced out in the ring main network, located in the roof-space. Mr Ragaud had realised that the original plastic installation did not have sufficient shut-off valves, a situation which had created problems when servicing the network. Thanks to the upgradeable Transair system, there was no problem in adding extra shut-off valves, enabling each section of the network to be isolated easily. A design software programme now available for creating drawing plans for further Transair installations has also proved beneficial for Val Nantais, enabling the network to be measured and product lists to be drawn up simply and quickly.