what does a code 12 on an rinnai tankless water heater mean?

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Answered: What are the advantages of usign a tankless water heater within my home

There are many advantages of using tankless water heater. Some of them are – on demand heating will never let you run out of hot water, it is able to supply more hot water than traditional water heaters, it saves more energy, and you don’t have to clean the dirty tank. Also, installation is easy ...

Answered: Hard water problems

Yes, there are many problems using very hard well water with tankless heaters. According to a study at New Mexico State University, commissioned by the Water Quality Research Council, water heaters operate from 22 percent to 30 percent less efficiently when plagued with hard water scale. Read More ...

Answered: Gas control dial on water heater tank got wet and will not turn

If the control got wet, then you have a leaky tank. It is time to replace the heater.

Answered: How long do tankless water heaters generally last?

Now this type of water heater is very popular because of its environmental friendliness and energy efficiency. Very well this topic are covered on the site http://thetanklessheaters.com .

Answered: How do the tankless electric water heaters work? I ...

I've had a tankless natural gas water heater for about 10 years now, and it works quite well. However, there are some things to consider before buying one. They are quite pricey, nearly three times as much as a conventional heater. They do use less fuel, but do not give the large volume a ...

Answered: Anybody out there familiar with electric tankless water heaters that run

Yes, they are suitable for Residential use, a bit more Expensive, then conventionals, but in the long run probably the best for conserving energy...
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Water Heater Up To Code

Well I know for a fact that most of the water heater codes came out of Salt Lake City recently. http://www.lecplumbing.com/?page_id=56

Whole House Tankless Hot Water Heaters

Read http://thetanklessheaters.com and find all answers on your questions

What could be wrong when the water heater keeps ...

It could be that that the gas volume is not set high enough. A plumber can check this for you. My gas volume was between 7-8 and the heater kept cutting off. The plumber set the volume to 12 and it works fine now.

Tankless propane water heater

Timothy, it sounds like you'll have to 'sweat' an adapter fitting to make the transition from a 1/2 inch to a 3/4 inch. So, you'll have to have a torch that heats up really hot, and know how to use it to make the adaptation possible; skilled plumbers know how to do this. Seek out local plumbing ...