ASME Hydronic Tanks

Backstop® AC Series Tanks are fixed-diaphragm type, precharged thermal expansion with ASME certification. They are designed to absorb the expansion forces and control the pressure in potable water systems.

Model No.	Volume (gal.)	Height	Diameter	Sys. Conn.	Wt. (lbs.)
12-HC15	8	19”	12”	3/4”	44
12-HC20	11	26”	12”	3/4”	47
12-HC40	25	33”	16”	1”	90
12-HC60	35	45”	16”	1”	111
12-HC80	45	38”	20”	1”	147
12-HC100	60	49”	20”	1”	167
12-HC120	70	46”	24”	1-1/2”	225
12-HC144	80	49”	24”	1-1/2”	245
12-HC180	90	52”	24”	1-1/2”	265
12-HC200	115	66”	24”	1-1/2”	295
12-HC240	140	78”	24”	1-1/2”	425
12-HC260	158	61”	30”	1-1/2”	475
12-HC280	211	79”	30”	1-1/2”	645

ELBI ASME Hydronic Tanks

Model No.	Volume (gal.)	Description	Diameter (inch)	Height Base Included (inch)
12-HCB8	2 GAL	ASME BAG EXP TANK	10.6”	7.8”H
12-HCB19	5 GAL	ASME BAG EXP TANK	10.6”	7.8”H
12-HCB30	8 GAL	ASME BAG EXP TANK	15.8”	13.1”H
12-HCB45	12 GAL	ASME BAG EXP TANK	15.8”	18.3”H
12-HCB80	21 GAL	ASME BAG EXP TANK	15.8”	33.7”H
12-HCB100	26.5 GAL	ASME BAG EXP TANK	19.7”	26.2”H
12-HCB140	37 GAL	ASME BAG EXP TANK	19.7”	32”H
12-HCB170	45 GAL	ASME BAG EXP TANK	19.7”	50”H
12-HCB200	53 GAL	ASME BAG EXP TANK	21.7”	50”H

Net output in 100’s of BTU per Hour	Finned Tube Baseboards or Radiant Panels	Convectors or Unit Heaters	Cast Iron Radiators	Diameter	Sys. Conn.	Wt. (lbs.)
25	H-15	H-15	H-15	H-15	3/4”	44
50	H-15	H-15	H-30	H-30	3/4”	47
75	H-30	H-30	H-30	H-60	1”	90
100	H-30	H-30	H-60	H-60	1”	111
125	H-30	H-60	H-60	H-90	1”	147
150	H-30	H-60	H-90	H-90	1”	167
175	H-60	H-60	H-90	H-90	1-1/2”	225
200	H-60	H-60	H-90	H-90	1-1/2”	245
250	H-60	H-90	H-90	CALL	1-1/2”	265
300	H-90	H-90	H-90	CALL	1-1/2”	295
350	H-90	H-90	CALL	CALL	1-1/2”	425
400	H-90	CALL	CALL	CALL	1-1/2”	475

System Content	100	110	120	130	140	150	160	170	180	190	200	210	220	230	240
25	H-15	H-15	H-15	H-15	H-15	H-15	H-15	H-15	H-15	H-15	H-30	H-30	H-30	H-30	H-30
50	H-15	H-15	H-15	H-15	H-15	H-30	H-30	H-30	H-30	H-30	H-30	H-60	H-60	H-60	H-60
75	H-30	H-15	H-15	H-30	H-30	H-30	H-30	H-30	H-60	H-60	H-60	H-90	H-90	H-90	H-90
100	H-30	H-15	H-30	H-30	H-30	H-30	H-60	H-60	H-90	H-90	H-90	H-90	H-90	H-90	H-90
200	H-30	H-30	H-30	H-60	H-60	H-60	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL
300	H-30	H-60	H-90	H-90	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
400	H-60	H-90	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
500	H-60	H-90	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
600	H-60	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
700	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
800	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
900	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL

HC SERIES

Gal.	Backstop©	Amtrol	Elbi
8	HC15	AX-15	HTS-30
11	HC20	AX-20	HTS-45
25	HC40	AX-40	HTS-100
35	HC60	AX-60	HTS-140
45	HC80	AX-80	HTL-170
60	HC100	AX-100	HTL-200
70	HC120	AX-120	HTL-200
80	HC144	AX-144	HTL-300
90	HC180	AX-180	HTL-400
115	HC200	AX-200	HTL-450