Liquid Depth (inches)	Barrels	Air Gap (inches)
3	3.5	177
6	7	174
9	10.5	171
12	14	168
15	17.5	165
18	21	162
21	24.5	159
24	28	156
27	31.5	153
30	35	150
33	38.4	147
36	41.9	144
39	45.4	141
42	48.9	138
45	52.4	135
48	55.9	132
51	59.4	129
54	62.9	126
57	66.4	123
60	69.9	120
63	73.4	117
66	76.9	114
69	80.4	111
72	83.9	108
75	87.4	105
78	90.9	102
81	94.4	99
84	97.9	96
87	101.4	93
90	104.9	90
93	108.3	87
96	111.8	84
99	115.3	81
102	118.8	78
105	122.3	75
108	125.8	72
111	129.3	69
114	132.8	66
117	136.3	63
120	139.8	60
123	143.3	57
126	146.8	54
129	150.3	51
132	153.8	48
135	157.3	45
138	160.8	42
141	164.3	39
144	167.8	36
147	171.3	33
150	174.8	30
153	178.3	27
156	181.7	24
159	185.2	21
162	188.7	18
165	192.2	15
168	195.7	12
171	199.2	9
174	202.7	6
177	206.2	3
180	209.7	0