The W802 can be installed either vertically or horizontally. When installed it is important to ensure that the end which forms the collar is the outflow end of the fitting.
With BSP threaded ends, the W802 SRU is supplied with W132 F.I. to Pipe Couplers at each end.
The unit must be anchored with a metal clamp which should be located round the body of the SRU, just below the ridge round the top of the collar. This allows the pipe inserted into the collar to move freely.