It is recommended that the tank be drained and flushed every 6 months to remove sediment which may buildup during operation. The water heater should be drained if being shut down for extended periods of time.
GAS-FIRED WATER HEATER:
To drain the tank, perform the following steps:
- Turn off the gas to the water heater with the manual gas shut-off valve.
- Close the cold water inlet valve.
- Open a nearby hot water faucet.
- Connect a hose to the drain valve and terminate it to an adequate drain. Note: The drain hose should be rated for at least 94°C (200°F). If the drain hose does not have this rating, open the cold water inlet valve and nearby hot faucet until the water is no longer hot.
- Open the water heater drain valve and allow all the water to drain from the tank. Flush the tank with water as needed to remove sediment.
- Close the drain valve, refill the tank, and restart the heater as directed under "Operating Instructions". If the water heater is going to be shut down for an extended period, the drain valve should be left open. Important: Condensation may occur when refilling tank and should not be confused with a tank leak.
ELECTRIC WATER HEATER:
NOTE: Make sure power is turned off in the case of electric heaters. Electric elements will burn out if they are operated in a "dry" tank.
- Turn off water supply.
- If floor drain is not near water heater, connect a garden hose to drain valve and direct to floor drain.
- To speed the flow of water, open a hot water tap to let air into tank at a single handled faucet nearby.
- Allow water to run, until water is clear and no discolouration in water.
- Turn drain valve off once water is clear.
- Turn water supply back on. Fill tank with water.
- Make sure tank is completely filled with water. Turn nearby faucet off.
- Check for leaks.
- Restore power.
Glass lined water heaters are supplied with sacrificial magnesium anode rods that protect the interior of the tank through cathodic action. As the rod works, it slowly dissolves over time and must be replaced when it is totally consumed.
ANODE ROD INSPECTION INSTRUCTIONS:
- Locate the anode rod on top of the water heater. It is accessible through the hole closest to the center of the tank. There will be insulation covering it and there may be a plastic cap over the access hole. The anode rod has a 1 1/16th inch hex head.
- Turn off the power if electric. If gas, turn valve from "on" to "pilot" on the water heater.
- Turn off the cold / inlet water supply to the heater.
- Drain off approximately 5 gallons of water from the unit.
- Using a 1 1/16th socket wrench, remove the anode rod. (It could be well tightened from the factory.)
- Inspect anode rod for consistent pitting. If pitting is consistent and thicker than 3/8" in diameter, reinstall rod. If rod is less than 3/8" in diameter, or bare inner core is exposed, other than at each end, replace anode rod.
- Turn water supply back on and ensure the tank is completely filled-up with water by opening all the hot water faucets in the house to release the air in plumbing system. Allow the water to run for three minutes before closing the faucets.
- Turn the power back on, or turn the dial on the gas valve from "pilot" back to "on" depending upon your unit.
- Turn off the electrical switch or shut off main gas supply.
- Close the cold water inlet valve to the heater.
- Open a hot water faucet within the system to relieve tank pressure.
- Drain 2-5 gallons of water to allow the addition of bleach to the tank. Use a hose connected to the drain valve if an open drain is not adjacent to the heater. CAUTION: Water may be HOT.
- Remove anode rod or disconnect the hot water outlet pipe from the heater.
- Using a funnel in the anode rod or hot water opening, add one gallon of household chlorine bleach (e.g. Clorox, Javex ) for every 25 gallons of tank capacity. Re-pipe the heater.
- Reinstall anode rod(s) after inspecting and replacing as needed.
- Open the cold water inlet valve at the heater and fill the tank with water. Then draw the water to every hot water fixture, until the smell of chlorine is detected. Operate dish and clothes washers until a noticeable amount of the chlorine is detected as well. All hot water lines must receive treatment.
- Close inlet valve and leave the bleach mixture in the system for a minimum of 2 hours.
- Drain the bleach mixture from the tank through the heater drain valve and close the heater drain valve.
- Open cold water inlet valve and completely fill the tank with fresh water. To ensure that the water heater is full of water and that all the air has been purged from the system, run all the hot water faucets in the house continuously for three (3) minutes. If you can still smell chlorine at the faucets run them until there is no longer any odour. Do not supply power to this water heater until you have verified that the unit is completely filled with water.
- Check for water leaks at all fittings used; repair as necessary.
- Turn on the manual electrical switch or gas valve and ensure tank is full of water to prevent dry-firing.
If an inspection of the filter shows a build-up of dirt or debris on the filter, it should be cleaned. The filter can be vacuumed to remove the build-up.
Visually inspect the flame arrester by placing a mirror underneath the water heater. A flashlight can be used to illuminate the slots in the flame arrester if necessary. Routine cleaning of the flame arrester is recommended if the inspection shows accumulation of debris on the flame arrester.
- Use a vacuum cleaner to remove all loose debris in the flame arrester.
- If necessary, a soft bristle brush can be used to dislodge any remaining debris.
- Turn off the power if electric. If gas, unplug and turn off the incoming gas supply to the water heater.
- Turn off the cold inlet water supply to the heater.
- Open a hot water faucet located nearby and leave it open. Turn off water supply to house if single handle faucets could be opened during this procedure.
- Open the drain and drain off approximately 5 gallons of water from the heater.
- Disconnect the cold water supply line from your water heater.
- Put a thick layer of rags around the threads of the cold water inlet nipple to avoid damaging the threads when you unscrew the nipple.
- Using a pipe wrench, unscrew the cold water inlet nipple-dip tube combination. A helper may be required to steady the heater.
- Inspect for damage, such as a split, crack or fracture; replace the dip tube if necessary. If dip tube is completely missing, check the hot water outlet to eliminate the possibility of mix-up at installation.
- Wrap threads of the new dip tube with "White Teflon Tape" or use "Teflon Pipe Dope"
- Install the dip tube into tank and tighten.
- Reconnect the cold water supply line to the heater.
- Turn water supply back on and ensure the tank is completely filled with water. Open a faucet to release air from the plumbing system.
- If electric turn the power back on; or if gas, turn on the gas supply to the unit and follow the lighting instructions on the side of the water heater.