My question is not found in these FAQ’s, where do I look next?
Check out the Hubbell Product Center at Here for a complete listing of all technical documentation available by model. Get easy access to Installation, Operation & Maintenance manuals, Sales Brochures, Service Bulletins, Wiring Schematics, Parts Breakdowns and various other technical documents related to the full line of Hubbell water heaters. Or, if you prefer, please call us at 800-647-3165 and ask to speak to a Sales Engineer.
Where can I purchase replacement parts?
Parts are available for your Hubbell water heater direct from the factory. Please call 800-647-3165 and ask for our parts department. Please have your model and serial number handy.
Do I need to install an insulation blanket?
No. Most new electric water heaters are highly efficient with respect to the amount of heat loss radiating from the storage tank. This is due to the use of “blown in” polyurethane foam insulation as the insulating method for modern tanks, compared to the fiberglass blanket style insulation used by water heater manufacturer’s largely in the past. As such there is little to no benefit, and very possibly a detrimental effect to efficiency, installing an insulation blanket on a new electric water heater constructed with foam insulation.
What is the average life of an electric water heater?
The most important factor related to the life expectancy of a water heater is the quality and type of storage tank. On an average the life expectancy of a glass lined electric water heater is about 10-12 years (according to the National Association of Home Builders 2007 Study of Life Expectancy of Home Components http://www.nahb.org/fileUpload_details.aspx?contentID=99359 ), compared to a cement lined electric water heater’s average life expectancy of 23-26 years (Independent study of over 25,000 installations for an Electric Utility). Of course, there are various other factors that affect longevity including pressure fluctuations, usage, water conditions, environmental conditions, etc.
Is it OK to use softened water with my cement lined tank?
Yes it is OK. A water softener system will not affect the longevity or operation of a Hubbell cement lined water heater tank. A water softener is typically installed when a potable water system has hard water resulting in the need to soften the water. Unfortunately, the salt used in a water softener corrodes the anode rod and exposed steel surfaces of the water heater tank, rapidly causing a glass lined water heater to corrode and leak within a few years. This is an issue for a glass lined water heater due to its reliance on a sacrificial anode, however because a cement lined tank does not use a sacrificial anode softened water is of no concern to the Hubbell cement lined tank.
What is thermal expansion and how does it affect me?
Thermal expansion is created when water in a hot water system expands due to increasing temperature. When there are no faucets/fixtures open to release the excessive pressure caused by the water being heated up, and if there is no expansion tank in the system to absorb the expanded water, then it is likely that the water heater T&P (temperature and pressure) relief valve will open slightly and begin to drip to release the excessive pressure. This is not a condition that the T&P relief valve is intended, it is a safety device not an operational device. Thermal expansion can be evident immediately upon a new installation when a cold system is first undergoing heat up, or even occur years in the future due to seemingly unrelated changes to the plumbing system but enough so that thermal expansion becomes a problem. If Thermal expansion is present a properly sized expansion tank should be installed to resolve this problem.
What is a sacrificial anode and does a cement lined tank need one?
All water heaters constructed using a steel tank requires a lining to protect the internal steel surfaces from corrosion. Certain linings (i.e. glass and epoxy), due to their nature, have unavoidable holes and imperfections resulting in exposure of the steel tank. As a result of this deficiency, the manufacturer will install an anode rod(s) in an attempt to delay corrosion of the steel tank. An anode rod is typically made of aluminum, magnesium or zinc, is a maintenance item that requires periodic inspection and replacement, and is often times the cause of a “rotten egg” odor to your hot water. Often referred to as a sacrificial anode rod because, over time, it slowly dissolves, sacrificing itself as it is attacked by aggressive substances in the water which would otherwise attack the steel tank through the pinholes and imperfections of the glass or epoxy lining. A cement lined steel tank on the other hand does not require an anode because of the thickness and guaranteed 100% coverage of the cement lining over all internal surfaces of the steel tank. This eliminates the need for an anode rod in a cement lined water heater, resulting in a significantly longer life compared to a glass or epoxy lined water heater. For a further discussion please click on the following link Cement Lining
What is the max water temperature setting?
The Hubbell cement lined tank is suitable for storing water up to 194°F. However, it should be noted that your water heater will likely require optional control accessories to achieve this temperature, but there is no concern regarding the ability of the lining to withstand this temperature. Additionally, there are numerous safety concerns that must be considered when storing water at elevated temperature, please consult factory.
Which is better for me, a tankless or storage type water heater?
It depends. A tankless water heater is sometimes referred to as a Point-of-Use (POU) or instantaneous water heater. Due to the relative small physical size of a tankless water heater compared to a storage tank water heater, a tankless option can be advantageous from a space saving perspective and can sometimes be installed closer to where you want hot water (hence the term POU). However, tankless heaters are not suited for many applications, so it is critical that before choosing to go tankless you have carefully considered all of the factors that sometimes make the tankless option more complicated and risky compared to a storage type water heater. In particular, you should understand the operational characteristics, maintenance requirements, reparability, and sometimes significant installation requirements of a tankless water heater before making a decision. Tankless units do not store heated water like a storage type water heater; they only heat water as there is demand and therefore must be sized to meet the maximum flow for the application. In some cases a tankless water heater may improve operating efficiency, but possibly at the expense of user comfort. Hubbell tankless water heaters are available in electric Electric Tankless or gas Gas Tankless
What should I know about Legionella disease?
Legionella is the bacteria responsible for Legionnaire’s Disease, an acute bacterial infection of the lower respiratory tract. This bacterium was first identified in 1977 by the Centers for Disease Control as the cause of an outbreak of pneumonia that caused 34 deaths at a 1976 American Legion Convention in Philadelphia. Pontiac Fever is a less severe, non-pneumonia, flu-like disease that is associated with and likely caused by Legionella bacteria. Legionella is a fairly common water bacterium and has been found to exist widely in many surface water sources including lakes, rivers, streams and ponds. It can also be found in ground water sources and some soils. At the levels found in these naturally occurring sources it typically does not pose a threat to public health. When the bacterium enters a domestic water system it can find an ideal host environment of warm water temperatures (105-115°F), stagnant water areas (isolated storage tanks and dead-end piping legs) and ample food sources (sediment, scale, deposits and biofilm). Under these conditions Legionella can rapidly colonize, forming higher concentrations that can pose the public health threat of Legionnaire’s Disease. There are many methods of controlling colonization of Legionella bacteria. However, a widely accepted and preferred method is to maintain the hot water system storage temperature continually at or above 140°F. Unfortunately, the elevated temperature necessary to minimize the growth of and kill Legionella bacteria has the potential to cause serious thermal shock and scalding injuries. As such, many plumbing engineers will specify that the water heater be set to maintain water temperatures at 140°F or higher to reduce the risk of Legionella, but then specify the appropriate mixing valve to ensure safe delivery of hot water to the fixtures. For a more thorough discussion of Legionella please go to here and the following link to the US Department of Labor OSHA information regarding Legionnaires’ Disease OSHA here
Do I need earthquake straps or seismic restraints?
It depends. The Uniform Plumbing Code (UPC), section 510.5 states "In seismic zones 3 and 4, water heaters shall be anchored or strapped to resist horizontal displacement due to earthquake motion. Strapping shall be at points within the upper one-third (1/3) and lower one-third (1/3) of its vertical dimensions. At the lower point, a minimum of four (4) inches (102mm) shall be maintained above the controls with the strapping." If the installed location is in these seismic zones then a strap/restraint system is required. Otherwise, please consult with a plumbing engineer to determine the proper installation method for your water heater.
Is there a cold water dip tube in the Hubbell tank?
Not exactly. The Hubbell cement lined tank includes a cold water diffuser integrated into the cold water connection which allows incoming cold water to be introduced into the tank in a controlled and non turbulent manner, thus avoiding premature mixing of cold water with the hot water in the tank. On Hubbell cement lined tanks the cold water inlet/diffuser is located on the side in the lower portion of the tank. Therefore, a Hubbell cement lined tank does not require a long dip tube extending all the way from the top to the bottom of the tank as is common in glass lined tanks.
My T&P relief valve is dripping water, what does this mean?
A temperature and pressure (T&P) relief valve is a safety device intended to relieve excessive pressure (typically >150psi) or excessive temperature (210°F/99°C). Typically, a dripping T&P is most likely the result of excessive pressure build up in the water heater. When a T&P opens due to excessive temperature, you will most likely see a significant amount of steam in the air as the water flashes into steam as it discharges from the T&P. A relief valve discharging due to excessive pressure is by far the most common reason for relief valve discharge. It is also worth noting that a T&P relief valve will begin to open when pressure is within 5% of its set pressure rating, as an example a 150psi relief valve will begin to open and “weep” at 142psi. See FAQ relating to thermal expansion for a more detailed discussion of this problem.
Where can I purchase a Hubbell water heater?
There are numerous ways to purchase a Hubbell water heater, mainly depending upon the model you desire and your geographic location. The easiest way is to contact Hubbell directly at 800-647-3165 and ask for the sales department where you will be directed to either our local representative, local wholesaler or dealer, internet or our own order entry department for quick and easy ordering.
How does my water heater ship?
All Hubbell storage type water heaters ship via common carrier and are classified by the Commodity Classification Standards Board under National Motor Freight Classification (NMFC) class 100. Each water heater is palletized and wood crated. All Hubbell tankless water heaters, when transported using common carrier, ship class 77.5. To provide the lowest transportation cost, in most cases the shipment is made on Hubbell’s account and the freight cost is added to the invoice, commonly referred to as “Pre pay and add”.
What code requirements are applicable for my installation?
The installation of water heaters are mostly governed by the Uniform Plumbing Code (or CPC in California), Uniform Mechanical Code, and National Electrical Code. These are standard codes that are used across the United States, and each state can amend them as they wish. To take it further, each city and county jurisdiction has assigned one or more building officials with what is called Administrative Authority. This "Authority" allows each jurisdiction the right to interpret the codes as they see fit. Because of this, many cities differ on their requirements. Hubbell strongly recommends that you contract with a plumbing engineer who knows and understands the intricacies of the building code requirements for your location.
Why is Hydrastone Cement a better choice over glass lining?
Cement lining provides guaranteed 100% coverage with a minimum thickness of 0.5” over all internal tank surfaces. In comparison, glass lining is approximately 0.005” thick and includes imperfections, pinholes and variation in coverage thickness resulting in portions of unprotected steel tank exposed to corrosion. In an attempt to compensate, glass lined tanks include a sacrificial anode in an effort to slow down the corrosion of the tank. Cement lined tanks on the other hand do not require an anode due to the integrity of the lining. As such, a cement lined tank will far outlast a glass lined tank. For a more complete explanation of the benefits of the Hubbell cement lining please click on the following link Cement Lining
Why is a storage heater preferred over a tankless heater?
There are a number of factors that make a storage system more desirable than a tankless system for delivering tepid water to your safety shower. Infrastructure, pressure drop, reliability, and serviceability are the major areas where there is a significant difference between the two systems. Regarding infrastructure, a storage system is typically rated 6kw or less and a tankless system is typically rated around 150kw, a significant difference when considering wire and circuit breaker size and electrical demand, not to mention installation costs. A storage system can operate on either 1 or 3 phase power and draws at most 25 amp depending upon your power selection, whereas a tankless system is practical only in 3 phase power and draws 180 amps or more. Pressure drop through a storage system is less than 4 psi, whereas a tankless system is likely to result in a pressure drop of 15 psi or more, potentially resulting in insufficient flow through the safety shower. With respect to reliability, a storage system utilizes well proven and long fielded technology and is extremely reliable, not to mention the fact that because the system operates using stored hot water, you have visual positive verification that the system is fully hot and ready to provide tepid water before an emergency situation arises. A tankless heater on the other hand is in “standby” mode until such time that it is required. If the unit for some reason is inoperable or malfunctions, there is no way for an operator to know its status prior to an emergency event. This could be disastrous for an injured person, not to mention the facility owner, if a person is unable to properly wash down due to a malfunctioning or inoperable heater. Finally, because a tankless heater requires sophisticated controls to operate and control temperature, it has significantly more potential failure points compared to a storage system, making it not only less reliable but significantly more difficult and expensive to maintain and service.
What temperature is tepid water?
Hubbell has designed its safety shower water heater to provide as standard 85°F tepid water, although 75°F is available as an option. In the ANSI /ISEA Z358.1-2009 American National Standard for Emergency Eyewash and Shower Equipment standard, tepid water requirements are in the Definitions section and are clearly defined as water ranging between 60°-100°F. ANSI defines "tepid water" as "A flushing fluid temperature conducive to promoting a minimum 15 minute irrigation period. A suitable range is 16-38°C (60-100°F)". Medical professionals recommend that tepid flushing fluids be used to treat chemically injured eyes and body tissue. Temperatures that exceed 100°F can enhance chemical interaction with the eyes and skin. Conversely, water temperatures below 60°F can cause hypothermic shock. The ANSI Z358.1-2009 standard states that while cooler flushing fluids may provide immediate relief after chemical contact, “prolonged exposure to cold fluids affects the ability to maintain adequate body temperature and can result in the premature cessation of first aid treatment”.
Can I install the Hubbell model EMV outdoors?
The standard EMV model is designed for indoor use only. However, optional construction including outdoor as well as hazardous location is available; please consult with a Hubbell Sales Engineer to discuss your application. Regarding outdoor installations, heat tracing for freeze protection of plumbing lines as well as an anti scald device to purge excessive temperature due to thermal gain (sunlight and ambient conditions) must be considered.
Can I install the Hubbell model EMV in a hazardous location?
The standard EMV model is designed for indoor use in a non hazardous location only. However, optional construction is available for installation in a hazardous location. Please note you will need to provide your Hubbell Sales Engineer with specific information at the time of quote request regarding the hazardous location rating you require for your application including Class (I, II or III), Division (1 or 2), Group (A, B, C or D) and finally the Temperature Class (T1 thru T6).
What is the pressure drop through the Hubbell model EMV water heater?
At 23 GPM (the full flow of a 20 GPM safety shower and 3 GPM of a combination face/eyewash station) the pressure drop across the entire Hubbell EMV emergency safety shower water heater is less than 4 psi.
What is the annual operating cost?
The annual operating cost including standby heat loss and semi-annual performance testing is approximately $154 (based upon $0.12 per kWHr) annually. This assumes an ambient temperature of 50F and incoming cold water supply of 40F and two (2) full operational 20 minute performance tests performed annually.
If I lose power, will I continue to get tepid water?
Yes. This is one advantage of the Hubbell model EMV storage tepid water heater. Because the Hubbell tepid water heater design utilizes a storage tank, there is always a sufficient supply of hot water on standby and ready for an emergency fixture. Once the Hubbell storage tank achieves its set temperature, the unit will deliver tepid water even when there is a disruption of electric power to the heater (i.e. during an emergency).