McDonnell Miller Series 157

For residential, commercial, and industrial applications. For boilers of any steam capacity. Monel bellows provides corrosion resistance.
Float chamber with integral water column provided
Mercury switches for high temperature service.
Maximum pressure 150 psi.

Replacement Heads
Model Number	Part Number	Description	Weight lbs.	Price
150S-HD 150S-M-HD 150-E-HD 150-E-M-HD	173000 173200 171640 171650	Head Mechanism 150-HD w/ manual reset High Pressure Level Control High Pressure Level Control Manual	10.5 12 12 12	$529.21 $529.21 $Call $Call
Ordering Information
Model Number	Part Number	Description	Weight lbs.	Price
157 157-MD 157-A 157-A-M 157-M 157-M-MD 157-R 157-R-M 157-RBP-MD 157-RL 157-RL-M	173500 173600 173700 173800 175400 175410 176200 177300 176501 176900 177000	157 Low water cut-off w/ water column 157 w/ maximum differential 157 w/ alternate tapping 157-A w/ manual reset 157 w/ manual reset 157-M w/ maximum differential 157 w/ alternate tapping 157-R w/ manual reset 157 w/ 2 integral conductance probes 157 w/ alternate tapping 157-RL w/ manual reset	39.7 39.7 39.5 39.5 39.7 39.7 42 42 51 42 42	$756.73 $Call $Call $Call $Call $Call $Call $Call $Call $Call $Call
Replacement Parts (View parts cut-sheet) Mercury Switches No Longer Available
Model Number	Part Number	Description	Weight lbs.	Price
SA150-125	348300	Mercury Switch, 2 wire (Replace the head that has the snap type switch)	0.3	$Call
SA150-124	348100	Switch, 3 wire	0.14	$Call
SA150M-124	348200	Switch, 3 wire w/ Manual reset	0.3	$Call
SA150-106R	347900	Bellows Assembly	0.4	$153.53
SA150-11	347600	Float and Rod	1	$164.21
150-14H	325500	Head gasket (for raised face head flange, 8 holes), 6 pack	0.5	$29.95
EA-157-S	354106	Short electrode for 157-RBP	0.5	$131.45
EA-157-L	354107	Long electrode for 157-RBP	0.5	$131.45
PCH-G-A-2	179150	Probe level control (Obsolete Replace with 750B-ENC & 750 B-P120)	2.7	$Call
SA150M-436	348900	Cover for mercury switch, manual reset only	0.5	$Call
SA150-436	326950	Cover for all other models	0.5	$50.03

Electrical Ratings
	Cut-off and Pump Circuit Rating
Voltage	Full Load	Locked Rotor	Pilot duty
120 VAC 240 VAC	7.4 3.7	44.4 22.2	125 VA at 120 or 240 VAC
Alarm Circuit Rating
Voltage					Amps
120 VAC 240 VAC					1 1/2
Dimensions
Model	A	B	C	D	E	F	G	H	J	K	L
157	1	1/2	13 3/8	2 5/16	4 15/16	11 3/4	16	11 1/2	3 1/2	3/4	5 7/8
157-A	1 1/4	3/4	13 3/8	2 5/16	4 15/16	11 3/4	16	11 1/2	3 1/2	3/4	5 7/8
157-R	1	1/2	13 3/8	2 1/4	5 7/8	11 3/4	17	11 1/2	3 1/2	3/4	6 1/4
157-RL	1 1/4	1/2	13 9/16	3 1/2	5 7/8	11 3/4	17	12 3/4	3 1/2	3/4	6 1/4