Q: The Temperature and Pressure relief valve has a threaded outlet. What attaches to it?
A: The T&P valve outlet must have a run-off tube attached to it. Most building codes require a tube that terminates 6" from the floor. If the T&P valve activates, water should flow into a drain or into a water heater pan that is plumbed to a drain. This run-off tube may be metal or plastic. Check local plumbing codes for correct material for your area.
Q: What are dielectric fittings and connectors?
A: When fittings of unlike metals are joined together (copper with brass, brass with steel, etc.) the faint electrical current that is present in any water pipe system will cause erosion of the threads in one or both of the fittings and cause leaking. The plastic liner or sleeve in the dielectric fittings and connectors prevents this from happening. Note: Stainless steel fittings and connectors are naturally dielectric and do not need the plastic lining.
Q: What is an anode rod?
A: It is a magnesium or aluminum rod inserted in the heater, from the top, in an opening of its own or as part of the outlet nipple. The metal is self-sacrificing (corrodes); this protects the tank and elements from corroding. Replacement anode rods are available and easy to install.
Q: Are water heater drain pans necessary?
A: It depends on the plumbing codes in your area and the location of your water heater. If your heater is in a garage or a non-finished basement where leaking water would flow harmlessly into a drain, a pan is not necessary. However, if the heater is in or above a living space where leaking could cause extensive water damage, it is cheap insurance to protect your home from such an event.
Q: What type of pan should be used?
A: Plastic pans should be used with electric water heaters, and metal pans should be used for gas water heaters and can be used with electric water heaters. Codes in some areas require metal pans for all heaters installed in a living space.
Q: I opened the drain valve and very little water flowed.
A: You probably have sediment and scale build-up on the bottom of the tank that is blocking the valve. In areas where the water is very “hard” or well water is used, lime build-up can occur. The high heat of the heater elements will cause scale and sediment to coat the elements and settle on the tank bottom. Light buildup of sediment may be removed by attaching a water hose to the drain valve. Drain the tank every 6-12 months, more often if necessary. Important: Turn off power first or it could cause element burn-out.
Q: What is the purpose of a water heater stand?
A: A stand is used primarily with gas water heaters when installed in garages and basements where combustible fumes may exist. Gas heaters have an open flame, and tests have shown that placing a gas water heater at least 16" above the floor will offer some protection against combustion of volatile fumes. |
