2-66. SKID-MOUNTED PRETREATMENT ASSEMBLY REPAIR (CONT)
Install elbow at WASTE connection.
Install reducer and nipple at WASTE connection.
Install two nipples and T-pipe between check valve and diaphragm valve.
Install check valve (subpara d).
Install diaphragm valve (subpara e).
Install three nipples and T-pipe at connection C-17.
Install nipple and elbow at top of pretreatment assembly.
Install elbows at connections C-13 and C-17.
Install T-pipe at connection C-21.
Install two nipples and bottom elbow.
Install grooved pipe coupling nipple and T-pipe.
Install elbow, four nipples, and three T-pipes on inlet side of ball valves.
Install two U-bolts.
Install four lockwashers, nuts, and spacers.
Install reducer bushing and nipple on diaphragm valve.
Install grooved pipe coupling nipple, two nipples, and three T-pipes on outlet side of ball valves.
Install butterfly valve (subpara f).
Install six pipe nipples on pretreatment assembly on inlet and outlet sides of ball valves.
Install three ball valves V-1, V-2, and V-3 (subpara c).
Install eight nipples at back of pretreatment assembly.
Install lanyard, two nuts, and screw on eight dust caps on back of pretreatment assembly. Install
Install T-pipe, adapter, and pipe plug leading to cartridge filter.