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Marathon Tanks

Silicon Solar Inc

Innovative Solar Solutions TM

Silicon Solar, in conjunction with Rheem-Ruud, is now offering Rheem Marathon tanks to expand the choice for our Customers. SunMaxx stainless steel solar storage tanks are still available, as are the Rheem Marathon water heaters, now offering both of these trusted brands. Rheem Marathon™ lifetime electric water heaters feature a high-efficiency design with a lightweight tank that won’t corrode. It is one of the most durable electric water heater ever made. The unique, award winning construction of the seamless plastic tank increases its strength, quality, and lifetime. An abundance of CFC


and HCFC free foam insulation from top to bottom results in the most energy savings than any other water heater in its class. Stainless steel elements resist lime buildup and operate more efficiently. The tank has a limited lifetime warranty and the parts have a six year warranty. Rheem Marathon™ lifetime electric water heaters are designed primarily for Residential use providing years of hot water for you and your family.

square foot of collector works well in the north and a minimum of 2 gallons per square foot in high sun areas (to deal with excess heat). When sizing keep in mind storage temperatures over 185F will void the Rheem warranty. The HelioFlow D-Basic solar kit is a great solar retrofit for a marathon .

Marathon tanks can be excellent choices for solar thermal systems because of their extreme durability. To calculate your tank capacity generally 1.5 gallons of storage per

• M50, 50 Gal.

Available Models: • M20, 20 Gal. • M40, 40 Gal. • M75, 75 Gal. • M105, 105 Gal.

Silicon Solar Inc Innovative Solar Solutions


Available Models Capacity (US Gal)

Energy Factor

Element Size

Dimensions (diameter x height)


1st Hour

M20 M40 M50 M75



200 W (120V)

23 1/2” X 34 1/2”

43 lbs




3800 W

21 5/8” X 65 1/2”

81 lbs




3800 W

23 1/2” X 66 3/4”

91 lbs




3800 W

28 1/4” X 62 5/8”

112 lbs





3800 W

30 1/4” X 70 3/4”

135 lbs



Features and benefits

Marathon Water Heaters

• Technologically advanced design is clearly differentiated from short lived steel water heaters. • It’s the most durable water heater made, with a warranty to match • Envirofoam™ insulation is completely free of CFC and HCFC ozone depleting gases. Marathon leads the way in environmental friendly manufacturing, design and operation. • Tank comes complete with a factory installed vacuum relief valve, ¾” brass tee and ¾” brass nipple for easy, professional installations. • Replaceable brass drain valve • All wiring run in conduit for easy control wiring • Seamless blow molded polybutene tank with no anode rod required for a corrosion free life • High temperature, commercial-grade diptubes for greater durability •

The filament wound fiberglass outer tank is designed to be more flexible and withstand more pressure than conventional tanks

• Our unique high temperature dip tube is offset from the concave bottom, creating a “whirlpool effect” which helps prevent sediment build-up •

Every tank includes 4’ of pipe insulation for even greater savings.

In order to maintain the highest standards of service and knowledge of the latest solar technologies, Silicon Solar is a proud member of:

© 2008 Silicon Solar Inc - All Rights Reserved l shw-pcs-001 l last revised: 11/2008

Product Brochure- Pheem Marathon Tanks  

Product Brochure

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