Yes, you will need a hot water tank for your water heater. There are, however, some tankless water heaters on the market. They cost a bit more, but there is a federal tax credit on them.
About 45 minutes to get hot first time.
about a half hour
A tankless and a gas(with a normal tank) water heater both burn gas to heat the water, so they need vents to bring air into the space where they are located, and a venting system for the exhaust. Some considerations for tankless: 1) they require larger gas supply pipes; 2) they can be placed on most walls, but you still need room around them; and 3) they heat the water as it flows through the pipe, so you still have to deal with the cold water which is in the pipe. I mention the last one because many people think that they will immediatley obtain hot water. For your situation, placing the tankless heater on the third floor would require new gas pipes. Commonly gas pipes are 3/4" in a home, and a tankless unit may need 1" at a minimum. Having the water heater on the same level would provide you with hot water sooner. Placing the tankless unit where the hot water storage tank is may require less plumbing, so it could be an easier task. The water will take longer to heat, and you could be wasting energy of the heated water in the pipe. This can be partially resolved by insulating the hot water pipes. Insulating these pipes is a wise idea for efficiency in either location.
The water pressure in my house is about 140PSI. Which is definitely dangerous. It happens more often than you would think. What happens is a city will use water supply lines which are too small for the water requirements. Therefore, they have to increase the pressure. You wouldn't want a pressure relief valve, because then if the pressure was too high, it would just spray water everywhere to release the pressure. You would want a pressure regulator installed, which is what I am working on for my house right now. Just to let you know though, you may have to get a thermal expansion tank for your water heater if you don't have one. See, the new pressure regulators have a check valve in them, which prevents water from traveling back into the city pipes once it has gotten into your house. When your water heater heats the water, the air bubbles in it expand, which increases the water pressure, and will probably cause your pressure relief valve on your water heater to blow. You can get a cheap water pressure meter at any improvement store to check it out. 50-60 PSI is ok. I would say you could take it up to 70 or 80 PSI safely.
The part that generates heat... depending if it is a gas / electric heater
Your heater core is plugged and you need a thermostat.
I am in need of a new water heater today. Where can one find reviews for water heaters?
Water Heater New Caney TX
Yes, you will need a hot water tank for your water heater. There are, however, some tankless water heaters on the market. They cost a bit more, but there is a federal tax credit on them.
You can get a water softner, or you might need a new water heater, the pipes inside might be moldly. Call you water company and have your water checked.
new boiler and hot water heater
The electrical unit on the water heater may be shorting or you may need to install a filter before the water heater as particles may be breaking the element inside.
You will need to remove the water lines from your heater core. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
My old water heater finally stopped working. I'm interested in purchasing a new one but would like to find out what other people have to say about it first. Where online can I read customers water heater reviews?
This is just a guess but you either need a new water heater or you need to adjust the temperature of the one you have.
You will need to remove the water supply hoses from your 1998 Oldsmobile Intrigue heater core. Remove the heater core retaining bolts. Reverse the process to install your new heater core.