Hi, I would like to ask a question, should I be concerned if I already put the dope in the female thread as well? it seemed to create a surplus on the inside. Now I am going to continue the work but will put a sediment trap along the line.
do you think that will be all right or should I start over?
@daneluz123 Just try to wipe out as much excess as you can. The reason you don't want it in the female threads is because as the male end threads in, it pushes the excess pipe compound towards the inside of the fitting. It can restrict the flow of the gas. If you just have a little bit in the threads, you'll be okay.
I find the pipe dope to work best on gas only. I tried it on a water line and it seeps a lot of water. It could be just me, but I had great results with standard Teflon tape after cleaning the pipe. When doing some gas pipe work a year or two ago, I noticed there was a yellow "gas" rated Teflon tape. It is thicker and does not split into strands like regular Teflon tape does. The idea is to prevent those strands from getting into the pipe and later an appliance. May be of use to someone.
I was repairing my outside water faucet. I am using a compression fitting for the copper pipe coming out of the wall of my house and I then am using a shutoff valve that has threaded fittings which I used teflon tape to seal it. When I first tested it I had a small leak around the the threaded joints of the shutoff valve. I tested it again the next day and no leaks. Should I trust it, is this normal? thanks
Is there any approved requirement or regulations regarding the installation of Black steel pipe (BSP) welded connected to Galvanized (GI) pipe, Technically is it acceptable to use GI pipe as branch pipe connected from main Fire protection piping system by welding even there is differences of chemical properties that maybe various form of easy corrosion existing between each pipe due to welding connection?
@caibarien71 i think this video was for developed countries only ,did you make your computer out of banana leaves? if so very clever, kill castro already take his brother with him you wont need to use ghetto rigged plastic bags anymore
I've just had a go at sealing the ends of threaded copper pipes using teflon tape and it's been a dismal failure. I followed the instructions here and elsewhere on the internet ie start at the end, double over, wind on in the direction the female part goes on etc etc but the bloody thing kept leaking every time I turned the mains back on. In fact each time i retried it got worse and the thread seems OK. Any ideas?? Thanks
Because the dope will potentially clog the pipe or fitting as you screw in the pipe. The excess is pushed ahead of the pipe. When applied to the threads of the male pipe, the excess stays on the outside of the completed joint.
Good basic video. Black iron pipe isn't difficult to seal. If it's prepped and tightened properly, it's a no-brainer. The vast majority of leaks I've experienced were actually in the test gauge. I've only seen one instance of a pinhole in a cast fitting (elbow, coupling, etc.). And, that's in 25 years of work.
Flexible stainless steel piping is quick. The brass compression fitting with the split ferrule is reliable. But... one nick from a recip. saw blade and all bets are off.
I agree 100%. I've had the same experiences. Very rare to have a pinhole leak in a fitting. CSST tubing is also vulnerable to lightning strikes. Read about it at my website. See the comment from the Firefighter....
Maybe one turn beyond hand tight?!?!? I guess small gas leaks aren't an issue. This was filmed before yellow teflon? How many years old is this film? Gas piping should not be done by someone who isn't experienced or working as a plumbers apprentice. Unions can be put in anywhere as long as it is not a concealed location. Pipe dope should be approved for gas piping (read the label). Make sure the threads are free of rust, dirt, and cutting oils.
Thanks for your comments! I just went to your channel. There are no videos there and you are totally invisible. Tell all of us why we should trust what you say. At this point you have no skin in the game. :-) My video is accurate as well as my comments. Please keep in mind that building codes across the USA are not all the same even though we are trying to move towards that standard.
Have you heard of a product called Loctite 55?It is currently on sale here in the U.K. and I use it upto 2" black iron(malleable).There is a guy on Youtube demonstrating it,just type in Loctite 55.
I never understand how people can work with black iron pipe. You see, when you screw on the pipe and you need to screw on an elbow, it seems to me that you have to do is sequencially one at a time. What if you forgot a T in the middle of the pipe when both end are done ? It seems to me that it is impossible to insert a T without a union, b/c when you unscrew one end of the pipe it tightens the other end. Am I right ?
You are 100 percent correct! In many places unions are illegal - except at a gas appliance. There are left/right couplings that can solve the problem. I have always tried to install dead-end tees along the way in case I want to tap into the system at a later date. It only cost a few dollars to do this. Just put a tee in, a four-inch nipple and a cap.
If you have a lot of black iron pipe to run for natural gas, check out CSST. It is flexible stainless steel tubing for gas. It eliminates all of the joints you have to make with black iron. It is tough stuff too. I drove over a sample with my car and it didn't deform.
Using white teflon tape is a code violation for gas. Tape used for gas must be the yellow tape specfically for approved for gas systems. The white stuff degrades and will clog the orifice of the down steam appliance.
Some plumbers use Teflon tape and pipe-dope together. Is this a 'good practice'-?? If not, why not-??
dlgreene3304 3 months ago
@dlgreene3304 It's overkill. You simply don't need both.
AsktheBuilder 3 months ago
Hi, I would like to ask a question, should I be concerned if I already put the dope in the female thread as well? it seemed to create a surplus on the inside. Now I am going to continue the work but will put a sediment trap along the line.
do you think that will be all right or should I start over?
thanks for the tips
daneluz123 1 year ago
@daneluz123 Just try to wipe out as much excess as you can. The reason you don't want it in the female threads is because as the male end threads in, it pushes the excess pipe compound towards the inside of the fitting. It can restrict the flow of the gas. If you just have a little bit in the threads, you'll be okay.
AsktheBuilder 1 year ago
i put both permatex and teflon on my threads. teflon goes on after. never have leaks.
landon1214 2 years ago
i do the same hafe and hafe works great !
67tr876 2 years ago
I find the pipe dope to work best on gas only. I tried it on a water line and it seeps a lot of water. It could be just me, but I had great results with standard Teflon tape after cleaning the pipe. When doing some gas pipe work a year or two ago, I noticed there was a yellow "gas" rated Teflon tape. It is thicker and does not split into strands like regular Teflon tape does. The idea is to prevent those strands from getting into the pipe and later an appliance. May be of use to someone.
eatont9999 2 years ago
I was repairing my outside water faucet. I am using a compression fitting for the copper pipe coming out of the wall of my house and I then am using a shutoff valve that has threaded fittings which I used teflon tape to seal it. When I first tested it I had a small leak around the the threaded joints of the shutoff valve. I tested it again the next day and no leaks. Should I trust it, is this normal? thanks
Berkner80 2 years ago
No. Tighten the joint at least an eighth of a turn
AsktheBuilder 2 years ago
Is there any approved requirement or regulations regarding the installation of Black steel pipe (BSP) welded connected to Galvanized (GI) pipe, Technically is it acceptable to use GI pipe as branch pipe connected from main Fire protection piping system by welding even there is differences of chemical properties that maybe various form of easy corrosion existing between each pipe due to welding connection?
Alvinrssolas 2 years ago
In Cuba we use plastic bags instead of teflon tape, work as well.....
caibarien71 3 years ago
Scary. Better hope that for some reason the plastic doesn't deteriorate over time.
AsktheBuilder 3 years ago
@caibarien71 i think this video was for developed countries only ,did you make your computer out of banana leaves? if so very clever, kill castro already take his brother with him you wont need to use ghetto rigged plastic bags anymore
busteroo7 1 year ago
I've just had a go at sealing the ends of threaded copper pipes using teflon tape and it's been a dismal failure. I followed the instructions here and elsewhere on the internet ie start at the end, double over, wind on in the direction the female part goes on etc etc but the bloody thing kept leaking every time I turned the mains back on. In fact each time i retried it got worse and the thread seems OK. Any ideas?? Thanks
mirabilo 3 years ago
Try the pipe sealant that comes in the can. Maybe your pipe and fitting are poorly machined.
AsktheBuilder 3 years ago
Please remember that installing gas pipe should be done by a licensed professional only. Unless otherwise specified in your state.
plmbrgrl24 3 years ago
Thanks for your comment! I'm all for following codes.
AsktheBuilder 3 years ago
sounds like a union hack to me
SucceedsAtWill 2 years ago
Good tip about clockwise tape wrapping. I was never sure about that.Why no dope on the inside of the fittings?
trogus2 3 years ago
Because the dope will potentially clog the pipe or fitting as you screw in the pipe. The excess is pushed ahead of the pipe. When applied to the threads of the male pipe, the excess stays on the outside of the completed joint.
AsktheBuilder 3 years ago
Good basic video. Black iron pipe isn't difficult to seal. If it's prepped and tightened properly, it's a no-brainer. The vast majority of leaks I've experienced were actually in the test gauge. I've only seen one instance of a pinhole in a cast fitting (elbow, coupling, etc.). And, that's in 25 years of work.
Flexible stainless steel piping is quick. The brass compression fitting with the split ferrule is reliable. But... one nick from a recip. saw blade and all bets are off.
PutSome5tankOnIt 3 years ago
I agree 100%. I've had the same experiences. Very rare to have a pinhole leak in a fitting. CSST tubing is also vulnerable to lightning strikes. Read about it at my website. See the comment from the Firefighter....
AsktheBuilder 3 years ago
nice
psvowns 3 years ago
Maybe one turn beyond hand tight?!?!? I guess small gas leaks aren't an issue. This was filmed before yellow teflon? How many years old is this film? Gas piping should not be done by someone who isn't experienced or working as a plumbers apprentice. Unions can be put in anywhere as long as it is not a concealed location. Pipe dope should be approved for gas piping (read the label). Make sure the threads are free of rust, dirt, and cutting oils.
HVACEMT 4 years ago
Thanks for your comments! I just went to your channel. There are no videos there and you are totally invisible. Tell all of us why we should trust what you say. At this point you have no skin in the game. :-) My video is accurate as well as my comments. Please keep in mind that building codes across the USA are not all the same even though we are trying to move towards that standard.
AsktheBuilder 4 years ago
Hi
Have you heard of a product called Loctite 55?It is currently on sale here in the U.K. and I use it upto 2" black iron(malleable).There is a guy on Youtube demonstrating it,just type in Loctite 55.
Thanks for your posting
Regards
Joshmcfee
Joshmcfee 3 years ago
I believe we have that in the USA.
AsktheBuilder 3 years ago
Uh huh there is always one of these "licenced plumbers only" guys.
Honestly not to put too fine a point on it an ape can assemble black iron pipe without leaks. It's alot simpler than you think.
Yellow teflon tape is a bit dicey because if you put too little it may leak.
But with pipe dope (my preference is Hercules H Block) as long as it's applied evenly and tightened its a perfect seal every time.
syphilistic 3 years ago
I never understand how people can work with black iron pipe. You see, when you screw on the pipe and you need to screw on an elbow, it seems to me that you have to do is sequencially one at a time. What if you forgot a T in the middle of the pipe when both end are done ? It seems to me that it is impossible to insert a T without a union, b/c when you unscrew one end of the pipe it tightens the other end. Am I right ?
cvaguy 4 years ago
You are 100 percent correct! In many places unions are illegal - except at a gas appliance. There are left/right couplings that can solve the problem. I have always tried to install dead-end tees along the way in case I want to tap into the system at a later date. It only cost a few dollars to do this. Just put a tee in, a four-inch nipple and a cap.
AsktheBuilder 4 years ago
You are correct. This video was taped *before* the yellow teflon tape was introduced.
AsktheBuilder 5 years ago
If you have a lot of black iron pipe to run for natural gas, check out CSST. It is flexible stainless steel tubing for gas. It eliminates all of the joints you have to make with black iron. It is tough stuff too. I drove over a sample with my car and it didn't deform.
ricksite 5 years ago
Using white teflon tape is a code violation for gas. Tape used for gas must be the yellow tape specfically for approved for gas systems. The white stuff degrades and will clog the orifice of the down steam appliance.
sssturges 5 years ago