A full bore shut off valve is required on cold water side unions must be installed within 12 inch of water heater to facilitate removal first five 5 feet of water line insulated maintains min.
Tankless gas water heater installation requirements.
Mount the tankless water heater securely to the platform.
If reticulating pump in system.
Please take these things into consideration before you decide to diy.
Plumbing the most important skill is needed for working with both gas and water lines installing fixtures and ensuring there are no potential leaks or pressure issues.
Electrical even gas water heaters have electrical parts and need to be hooked up to your breaker box.
Today tankless water heater energy factors range between 64 and 91 for gas fired models and up to 99 for electric models.
This ef rating is based on test procedures developed by the u s.
Vent termination all tankless water heater vents must terminate at least 4 feet from a property line.
Tankless water heaters generally require larger diameter gas supply lines higher voltage power supply if contemplating electric on demand dedicated special stainless steel flue known as category ii iii or iv or larger diameter exhaust system.
For both gas and electric models a tankless water heater s overall energy efficiency is measured using an energy factor ef rating.
The manual clearly says to appoint a licensed electrician or plumber for the job.
Choose a location for the new water heater that will allow you to vent it to the outside easily.
Build a platform with 2 x 4 inch pieces of lumber that will allow you to mount the new tankless water heater about four inches from the wall.
The models which need combustion air from the outside are required to have a second hose which is supposed to be put in.
Ok so san jose has the following requirements for where to install the tankless water heater.
And so some manufacturers don t recommend diy installation.
Restrictions on gas fueled tankless water heaters no gas appliance may be located in a room used.
If money or return on investment is the principal reason you are considering converting to a demand type water heater you should perform an accurate total cost analysis that reflects all of the costs to install operate maintain both types of water heaters.
Around the water heater.
With so many types of electric tankless water heater it s obvious the installation process can t be exactly generalized.
Enclosed areas just as closets might need air ducts and extra air inlets.