Reliance Water Heaters Water Heater ETC 10X User Guide

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Butyl diaphragm, for permanent separation  
of air and water, with no waterlogging  
Expansion Tank Sizing Chart For Residential Water Heaters  
WHY EXPANSION TANKS ARE IMPORTANT  
Water Heater Capacity in Gallons  
Inlet Water  
Pressure*  
Thermal expansion occurs when water is heated during non-use  
periods. The installation of a Pressure Reducing Valve (PRV), Check  
Valve or Back Flow Preventer ˝closes˝ the water system, leaving  
water with no room for expansion. National Standard Plumbing  
code: 10.5.7 requires backflow prevention, to prevent backflow into  
the water main.  
30  
40  
50  
66  
82  
100  
3
In-line design, with ⁄4˝ NPTM Connection:  
40 PSI  
50 PSI  
60 PSI  
70 PSI  
80 PSI  
ETC-2X  
ETC-2X  
ETC-2X  
ETC-2X  
ETC-2X  
ETC-2X  
ETC-2X  
ETC-2X  
ETC-2X  
ETC-5X  
ETC-2X  
ETC-2X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
ETC-5X  
installs in cold water line of water heater  
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Maximum Working Pressure 150 PSI  
Maximum Temperature: 140°F Residential  
180°F Commercial  
*Highest recorded inlet water pressure in a 24-hour period of  
regulated water pressure.  
Thermal expansion in a closed plumbing system can be damaging,  
dangerous and costly. Its effects include damage to water heater  
connections, gas water heater flue tubes, pumps serving washers and  
dishwashers, leaking faucets, ˝weeping˝ of water through the water  
heater T&P Safety Valve, and noisy water hammer in the pipes.  
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IAPMO Approved  
EXPANSION &  
PUMP TANKS  
5-Year Limited Warranty  
A
A properly sized Expansion Tank eliminates these problems, by giving  
water a place to go when thermal expansion occurs. When a water  
heating cycle ends, or when any fixture is opened  
within the system, the impact of thermal  
TYPICAL EXPANSION TANK  
INSTALLATION  
expansion is reduced, and water drains out of the  
expansion tank back into the system.  
B
RELIANCE EXPANSION  
TANK FEATURES  
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Protection against  
dangerous thermal  
expansion in closed  
systems  
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Steel shell with  
polyurethane coating  
for maximum corrosion  
resistance  
Reliance Water Heaters  
500 Tennessee Waltz Parkway  
Ashland City, TN 37015  
Water Heater Expansion Tanks  
Maximum Acceptable  
Volume (Gallons)  
Dimensions  
in Inches  
Shipping  
Weight  
(Lbs.)  
Gallon  
Capacity  
Model Number  
40 PSI  
60 PSI  
A
B
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Drawn-steel tank with  
2-coat bonded polymer  
inner lining  
Expansion tanks are pre-charged with a 40 PSI air charge. If the  
inlet water pressure is higher than 40 PSI,the expansion tank’s air  
pressure must be adjusted to match that pressure but must not be  
higher than 80 PSI.  
ETC-2X  
ETC-5X  
ETC-10X  
1.96  
4.55  
9.21  
1.27  
3.05  
6.55  
1.03  
2.19  
5.25  
838  
1138  
1538  
1212  
1434  
1534  
5
8
20  
Reliance Hotline: 1-800-365-4054  
All models: 150 PSIG Maximum Working Pressure  
© 2007  
November 2007R  
RPMCP00107  
 

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