Im installling my own Generac 18kw my main concern is if i have the recommended gas pressure listed at the back of the generator, plate label says NG- minimum 3.5 and max of 7 in WC,,,247,000 btu/hr…i have to test the pressure about 20 feet from where I’m setting up my generator where there is a 1” supply manifold..then using a 1” csst line so i can maintain the pressure on a 20-25ft run..hope my pressure is at 7 in wc or higher🙏 if not i may have to run a solo 70-80ft line of 1-1/4” line straight from the gas meter😫😫..im going to run my 2 furnace and test pressure if it holds up to generac’s recommended pressures 👍 good tips 🙂
Hi camilo8cheryl. Hopefully the pressures work out for you. It sounds like you have a handle on the situation. Are there any other appliances that use gas such as a stove or bbq that should be included in your testing? I know chances that not everything will be on at the same time but it’s possible. You want to size for the worst case scenario. The size of the pipe to the manifold is critical on how things will go. Once you have pressures and distances it should give you a good idea of the best way to pipe up the generator. Check your local rules on using the csst as it can vary quite a bit from what I have read on some of the forums. Thanks for posting and watching the video. Roger
Hi p51mustang31. It depends on the rules in your area. Where I practiced it was a requirement. It’s there to catch any debris. The gas regulators that service the appliance can easily be damaged from contamination. For smaller diameters it was required to be a minimum of 3” inches long and the same size as the pipe it served. From memory 1/2”- 2” required the same size drip leg as the pipe that serviced the equipment. Some people don’t like to use them outside where there is winter conditions. They seem to think that the drip leg could fill with water from condensation and freeze. I’ve never seen it happen. To be honest if the drip is cleaned out a short while after the initial installation it never needs it again. Usually you find some cutting oil or metal shavings from cutting threads if you have steel black pipe. Perhaps years ago the gas network of piping wasn’t as clean as today dictating the need for drip legs. I think it’s a good idea to install. Thanks for watching and posting. Roger
@tcudahey9550 Yes I am. I didn’t know I had the plumbers accent. I love the trade. However, all of the trades are my favourite. Thanks for looking at the video and taking the time to post a comment. Much appreciated. Roger
@@rpsmith Thanks for viewing and posting. This video was created to check the static pressure. Along the way I showed how to make some test fittings and use a manometer. It is a test. Most people watching these videos are probably homeowners who own generators. I wanted to keep it as simple as possible. More of an introduction to testing gas pressure. If you’re having problems and the generator won’t start this test is valid. I agree that another check you could do is a load test. Very important. Just as you would do on electrical circuits. I have another video that shows what you are suggesting. I look forward to all comments as they enhance the videos. Also they can point out things that I have missed or incorrect statements. Roger
Hi John Frederick. Thanks for looking at the video and posting a comment. I appreciate it. Roger
Well done, sir. Nicely done. Much appreciated.
Sorry I missed your post. Thanks. Roger
Im installling my own Generac 18kw my main concern is if i have the recommended gas pressure listed at the back of the generator, plate label says NG- minimum 3.5 and max of 7 in WC,,,247,000 btu/hr…i have to test the pressure about 20 feet from where I’m setting up my generator where there is a 1” supply manifold..then using a 1” csst line so i can maintain the pressure on a 20-25ft run..hope my pressure is at 7 in wc or higher🙏 if not i may have to run a solo 70-80ft line of 1-1/4” line straight from the gas meter😫😫..im going to run my 2 furnace and test pressure if it holds up to generac’s recommended pressures 👍 good tips 🙂
Hi camilo8cheryl. Hopefully the pressures work out for you. It sounds like you have a handle on the situation. Are there any other appliances that use gas such as a stove or bbq that should be included in your testing? I know chances that not everything will be on at the same time but it’s possible. You want to size for the worst case scenario. The size of the pipe to the manifold is critical on how things will go. Once you have pressures and distances it should give you a good idea of the best way to pipe up the generator. Check your local rules on using the csst as it can vary quite a bit from what I have read on some of the forums. Thanks for posting and watching the video. Roger
Go back a half turn on the tap every turn forward to break the chip. If you don't you could break the tap off inside your work.
Hi billskalicky5400. Good advice. I didn’t mention it. Thanks for watching and posting a comment. Roger
My generator does not have a drip leg on it, is that required?
Hi p51mustang31. It depends on the rules in your area. Where I practiced it was a requirement. It’s there to catch any debris. The gas regulators that service the appliance can easily be damaged from contamination. For smaller diameters it was required to be a minimum of 3” inches long and the same size as the pipe it served. From memory 1/2”- 2” required the same size drip leg as the pipe that serviced the equipment. Some people don’t like to use them outside where there is winter conditions. They seem to think that the drip leg could fill with water from condensation and freeze. I’ve never seen it happen. To be honest if the drip is cleaned out a short while after the initial installation it never needs it again. Usually you find some cutting oil or metal shavings from cutting threads if you have steel black pipe. Perhaps years ago the gas network of piping wasn’t as clean as today dictating the need for drip legs. I think it’s a good idea to install. Thanks for watching and posting. Roger
Well done. You sound like a plumber I’m guessing…is that right?
@tcudahey9550 Yes I am. I didn’t know I had the plumbers accent. I love the trade. However, all of the trades are my favourite. Thanks for looking at the video and taking the time to post a comment. Much appreciated. Roger
Not a valid test without also testing the pressure with the generator running with a 75% or better load!
@@rpsmith Thanks for viewing and posting. This video was created to check the static pressure. Along the way I showed how to make some test fittings and use a manometer. It is a test. Most people watching these videos are probably homeowners who own generators. I wanted to keep it as simple as possible. More of an introduction to testing gas pressure. If you’re having problems and the generator won’t start this test is valid. I agree that another check you could do is a load test. Very important. Just as you would do on electrical circuits. I have another video that shows what you are suggesting. I look forward to all comments as they enhance the videos. Also they can point out things that I have missed or incorrect statements. Roger