# WATER HEATER INSTALLATION – PART 3 INSTALLATION OF NEW WATER HEATER Published: 2024-10-10 Source: https://www.superbrothers.com/water-heater-installation-part-3-installation-new-water-heater/ ### Topics: ##### – Derange setup ##### – Discharge pipe on the P&T valve ##### – Hooking up the water ##### – Installing a vent line ##### – Connecting the gas line ##### – Making sure that everything went well [![WATER HEATER INSTALLATION]()]() ##### So you have removed old tank and mounted new one using earthquake straps as shown in part one and part two of this How To. Now its time to connect pipes and fitting to your new water heater. If you are not sure how to apply instructions on this or you do not have time to do heater installation, leave it to professionals, call us for advice or to schedule repair. SUPER MARIO PLUMBING give you highly professional service. ### Derange setup ##### Make sure that you previously mounted your water heater in the drain pan. Avoid possible flooding by routing to a drain. [![WATER HEATER INSTALLATION]()]() ### Discharge pipe on the P&T valve ##### Install the discharge pipe on the P&T valve. This valve opens when the temperature and pressure are too high. [![WATER HEATER INSTALLATION]()]() Route the discharge pipe to the floor drain. If you do not have a floor drain, place a bucket under the discharge pipe. [![WATER HEATER INSTALLATION]()]() Distance from the end of the pipe and the bucket should not be less than 6’’. [![WATER HEATER INSTALLATION]()]() ### Hooking up the water ##### Connecting the heater to water line is easy with the flexible hose kit, those connections are recommended for earthquake safety. When purchasing a kit, make sure that set also has a gas hose. [![WATER HEATER INSTALLATION]()]() Apply plumbers tape on the threads for water connection on your water heater and attach the flexible hoses on both, cold and hot connections, by using a wrench. [![WATER HEATER INSTALLATION]()]() Add plumbers tape to the connector body threads and fasten them to the hoses using a wrench. [![WATER HEATER INSTALLATION]()]() Now you need to connect the hose to a water pipeline. Hold the hose to the pipe, hose should have a little slack. Mark cut line using a pen and cut the pipe on marked length and remove the burrs so the pipe end is smooth. [![WATER HEATER INSTALLATION]()]() Slide the compression nut on to the pipe, push the pipe into the fitting and tighten the nut. Turn on the cold water supply and check your connections for leaks. If everything is good continue filling the tank of a water heater. [![WATER HEATER INSTALLATION]()]() Open a near by faucet hot water side while filling the tank, when water starts running from the faucet, the tank is full. Let it run few minutes to deaerate the tank. [![WATER HEATER INSTALLATION]()]() ### Installing a vent line ##### Secure the venting to the new exhaust hood. ##### [![WATER HEATER INSTALLATION]()]() Perform a vent test. If smoke from the match doesn’t go straight into hub you have a vent problem, check your vent system maybe it’s clogged or you have some other issue. If you are not sure call a professional. It is a good idea to have CO (carbon monoxide) detector near the heater. [![WATER HEATER INSTALLATION]()]() Install the air filter. [![WATER HEATER INSTALLATION]()]() ### Connecting the gas line ##### When connecting the gas line, first make sure that tanks control knob is off. [![WATER HEATER INSTALLATION]()]() Wrap the threads of the fittings with the gas plumbers tape. [![WATER HEATER INSTALLATION]()]() Screw one flare nut into the control valve and the other flare nut into the gas line. Then connect the gas hose. At this stage you can turn the gas supply on. [![WATER HEATER INSTALLATION]()]() Turn the gas supply on. Check connections using leak detector. If there is any leak it will bubble. If so tighten the connections or repeat complete gas supply line installations steps using more gas plumbing tape on the threads of the fittings. [![WATER HEATER INSTALLATION]()]() To light the unit, depending on the knob type you have, turn the automated – pilot mode and push the ignition button. Check your manufacturer documentation in details for this. Recommended temperature setting can vary but 120°F should be suitable. [![WATER HEATER INSTALLATION]()]() ### Making sure that everything went well ##### After a few hours, check your connections for leakage on the water and gas side. Also check your P&T valve for leaking. If it leaks, this means that it is reached its pressure set pressure, use your pressure regulating valve on the main water supply line to drop the pressure to recommended value. Usually. 60-70psi will do. [![WATER HEATER INSTALLATION]()]() DECLAIMER: Installing/removing gas, water and electrical line can be dangerous if not done professional, hazards exist during or after installation, SUPER MARIO PLUMBING does not recommend you to do it yourself. ## About Super Brothers Plumbing Heating & Air Super Brothers Plumbing Heating and Air is the company to call for HVAC repair, installation, and replacement, whole-home repipes, and water heater replacements if you want the best deals and service with warranty. We send experienced tradesmen to fix a broken HVAC unit or tackle a hot water heater replacement before it ruins your drywall. With over 1,000 verified online reviews, we are growing and helping Sacramento and San Jose communities experience better service, better pricing, and more personal, human-first support than large corporate providers. You can hire us for major projects or small fixes. No work starts on your property until you approve the upfront price. - Website: [Super Brothers Plumbing Heating & Air]() - Contact: [contact]() - About: [About]()