A.O. Smith 975 Series - Manual (Page 5)

5
DETAIL 4 - GAS VALVE
BTH 300A BTH 400A
Item Description 974/975 974/975
1 Pump, Recirculation ............................................................................... 196915 ................ 196915
2 Elbow, 3/4" Male - 1" Female ................................................................. 194872 ................ 194872
3 Di-Electric Union ..................................................................................... 196941 ................ 196941
4 Vent, Automatic Air ................................................................................. 194830 ................ 194830
5 Tube, Inlet .............................................................................................. 194820 ................ 194820
6 Tube, Closed End Dip ............................................................................ 194924 ................ 194924
RECIRCULATING SYSTEM
BTH 300A BTH 400A
Item Description 974/975 974/975
1 Nipple, 3/4" - Pipe ...................................... 85040-18 ...... 85040-18
2 Nipple, 1/8" - Pipe ...................................... 192948-2 ...... 192948-2
3 Pipe, Union ................................................... 95515 ............ 95515
4 Switch, Low Gas Pressure ........................ 191149-6 ...... 191149-6
LP Gas .................................................... 191149-4 ...... 191149-4
5 Tee, Non-Reducing ...................................... 40119 ............ 40119
6 Valve, NAT Gas ......................................... 194536-5 ...... 194536-5
Valve, LP Gas ........................................... 194536-6 ...... 194536-6
7 Orifice, NAT ............................................. 192477-268 .. 192477-304
Orifice, LP ............................................... 192477-185 .. 192477-221
8 Orifice holder ............................................... 192447 .......... 192447
Standard hardware items may be purchased locally.