2-66. SKID-MOUNTED PRETREATMENT ASSEMBLY REPAIR (CONT)
Remove three T-pipes, four nipples, and elbow from inlet side of ball valves.
Remove T-pipe and grooved pipe coupling nipple.
Remove bottom elbow and two nipples.
Remove T-pipe at connection C-21.
Remove elbows from connections C-13 and C-17.
Remove elbow and nipple from connection C-13.
Remove T-pipe and three nipples at connection C-17.
Remove diaphragm valve (subpara e).
Remove check valve (subpara d).
Remove T-pipe and two nipples between check valve and diaphragm valve.