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Natural Gas Water Heater Installation

Natural gas water heaters come in various shapes and sizes. Hence giving a direction for installation of all those types would take forever. Plus each installation differs based on location and job. On demand natural gas water heaters are the easiest to install and understanding their installation will give a decent idea of how rest of them go.
On demand water heaters are known for their ease in installation. But this does not mean that you would be able to do it hassle free. First and foremost thing to notice is that installation of tankless water heaters can be hazardous and may involve complications. It is always recommended that you hire a professional to do the installation for you. If you want to save up on money, you can even do all the handy work yourself but get a professional for doing the complicated installation work. There are manufacturers who would even go far enough to void your warranty if the installation is not certified by the professional. Hence, always check even before thinking about doing the installation yourself. Nevertheless, below is an explanation of what steps are involved in installing an on demand water heater.

STEP 1 - Install a Gas Supply Line for the Tankless Water Heater. Install a T and valve in the existing gas line and run a new corrugated stainless steel supply line for the tankless water heater. Building codes in many communities permit its use rather than conventional black iron for gas lines.
STEP 2 - Tie in New Copper Waterlines for the Tankless Water Heater. Tie in new waterlines for the tankless water heater. Bell-hanger brackets hold the pipes in place to prevent contact with the wall and to facilitate applying pipe insulation. Clean copper pipe joints and coat with flux before soldering.
STEP 3 - Build a Covered Platform to Position the Tankless Water Heater. Construct a covered vertical platform to position the tankless water heater so its vent clears the floor joists while passing through the outside wall. Secure the platform with Tapcon screws that cut threads into concrete to anchor themselves.
STEP 4 - Secure the Tankless Water Heater to the Platform Hang the tankless water heater on the covered platform. A single screw will hold it temporarily. Secure it by driving screws through the holes on its mounting bracket into the platform.
STEP 5 - Connect the Gas Shut-off Valve, Sediment Trap and Supply Line. Connect the gas shut-off valve and sediment trap and then attach the corrugated stainless steel supply line. Tighten the nuts at the connections with adjustable wrenches.
STEP 6 - Connect Water Shutoff Valves and the Tankless Water Heater. Make connections between the water shutoff valves and the tankless water heater. Use bell-hangers to support the pipe runs. Solder the joints on the copper piping.
STEP 7 - Use a Gas-sniffer to Confirm There Are No Gas Leaks. Turn on the gas and bleed the air from the line. Use a gas-sniffer device at each joint to confirm there are no gas leaks in the tankless water heater installation.
STEP 8 - Attach Heater Vent Piping, Connectors and Elbows. Apply heat-resistant silicon sealant to the heater vent. Slip on a connector and secure it with a hose clamp. Add and secure sections of vent pipe and elbows. Bore through the outside wall at the center of the vent hole.
STEP 9 - Install the Metal Wall Thimble through the Outside Wall. Trace the metal wall thimble and cut away the outside wall. Remove shingles as necessary for the thimble to rest against the wall sheathing. Install exterior and interior portion of thimble. Add remaining components of vent piping.
STEP 10 - Plug Electric Power to the Water Heater and Insulate Pipes. Plug in the tankless water heater unit to supply electrical power to its thermostat and on-board microprocessor. Protect the hot water pipes with pre-shaped pipe insulation. Turn on the gas and press the start button on the heater.