Marathon® Water Heaters Specifications

Find additional information see the Marathon Water Heater website

Product Specifications All units come complete with a factory installed temperature and pressure relief valve, replaceable brass drain valve, and vacuum relief valve.

Model	Capacity (US Gallons)	Energy Factor	Element Size (1)	Dimensions (diameter x height) (2)	Tank Weight (3)	1st Hour
MR15120	15	N/A	2000 watt (120volt)	21 5/8" x 35 5/8"	38 lbs	N/A
MR20120	20	N/A	2000 watt (120volt)	23 1/2" x 34 1/2"	43 lbs	N/A
MR20230	20	N/A	3000 watt	23 1/2" x 34 1/2"	43 lbs	N/A
MR30238 MR30245	30	.94	3800 watt 4500 watt	21 5/8" x 53"	69 lbs	39 42
MR40238 MR40245	40	.94	3800 watt 4500 watt	21 5/8" x 65 1/2"	81 lbs	48 52
MR50230 MR50238 MR50245	50	.94	3000 watt 3800 watt 4500 watt	23 1/2" x 66 3/4"	91 lbs	55 58 61
MSR50238 MSR50245	50 Short	.90	3800 watt 4500 watt	28 1/4" x 47 1/4"	89 lbs	51 54
MR75238 MR75245	75	.92	3800 watt 4500 watt	28 1/4" x 62 5/8"	112 lbs	75 78
MR85230 MR85238 MR85245	85	.92	3000 watt 3800 watt 4500 watt	28 1/4" x 70 1/4"	124 lbs	84 87 91
MR105238 MR105245	105	.91	3800 watt 4500 watt	30 1/4" x 70 3/4"	135 lbs	101 104

 

Notes
• Height is measured to the top of the T&P valve
• Shipping weight is approximately 6 to 10 lbs greater than tank weight for all units.
• Rough in for all models is 3/4" NPT at 5 3/4" c-c (cold inlet to hot outlet)

ALL MODELS ARE UL APPROVED

For more information on water heater energy factors and ratings,
go to GAMAnet.org - Product Directories