Actual Differences Between Yellow & White Teflon Tape ?

[billt460]

I have both, and use yellow only on gas.... As per code. But is there really much difference between the 2? If you reversed them, and used yellow on plumbing, and white on gas, what would be the key issue that could, or might happen?

 

[four.cycle]

Honestly?

I am beginning to think of teflon tape the same as I do "Silicone Dilectric Compound' and "Anti-Seize Compound".

Next time I come across a roll of that stuff out in the garage, it's going straight into the garbage.

 

[cgrutt]

I've often wondered if it's a code/inspection related thing, like purple primer so inspector can see pipes were primed before signing off... more recently been using the "mega" type blue tape that is supposedly good for multiple applications including water and gas.

 

[mike93lx]

I thought it signified density. White is single, yellow is double, pink is triple. Unsure on blue, but that stuff is thick.

I'm looking at rolls of yellow, pink and white as I type this and those thicknesses seem to line up. Haven't bought any mega tape yet

 

[LB-1911]

I have both, and use yellow only on gas.... As per code. But is there really much difference between the 2? If you reversed them, and used yellow on plumbing, and white on gas, what would be the key issue that could, or might happen?

Oatey® Yellow Gas Line PTFE Thread Seal Tape is designed and manufactured for natural gas, propane, butane, water, oil and chemical lines. Heavier than white tape with density of 1.35 - 1.50 grams/cubic centimeters, 4 mils thick

Oatey® Yellow Gas Line PTFE Thread Seal Tape | Oatey

Oatey® Yellow Gas Line PTFE Thread Seal Tape is designed and manufactured for natural gas, propane, butane, water, oil and chemical lines. Made of durable PTFE, this yellow thread sealing tape can be used on galvanized steel, iron, brass, copper, aluminum, stainless steel, polyethylene...

www.oatey.com

Plumber's Tape | Thread Sealant | Oatey

Oatey has the plumber's tape you need, from economy-grade, low-density tape to Hercules Megatape. Our plumber's tapes can be used on all threaded pipes, valves and fittings carrying acids, solvents, alkalis, steam, hot and cold water, LP gas, natural gas, oxygen and almost any chemical...

www.oatey.com

Thread from 09/21

https://www.garagejournal.com/forum/threads/any-harm-in-using-teflon-tape-to-seal-fuel-filter-threads.486194/#post-9220506

 

[mike93lx]

Oatey® Yellow Gas Line PTFE Thread Seal Tape is designed and manufactured for natural gas, propane, butane, water, oil and chemical lines. Heavier than white tape with density of 1.35 - 1.50 grams/cubic centimeters, 4 mils thick

Oatey® Yellow Gas Line PTFE Thread Seal Tape | Oatey

Oatey® Yellow Gas Line PTFE Thread Seal Tape is designed and manufactured for natural gas, propane, butane, water, oil and chemical lines. Made of durable PTFE, this yellow thread sealing tape can be used on galvanized steel, iron, brass, copper, aluminum, stainless steel, polyethylene...

www.oatey.com

Plumber's Tape | Thread Sealant | Oatey

Oatey has the plumber's tape you need, from economy-grade, low-density tape to Hercules Megatape. Our plumber's tapes can be used on all threaded pipes, valves and fittings carrying acids, solvents, alkalis, steam, hot and cold water, LP gas, natural gas, oxygen and almost any chemical...

www.oatey.com

Thread from 09/21

https://www.garagejournal.com/forum/threads/any-harm-in-using-teflon-tape-to-seal-fuel-filter-threads.486194/#post-9220506

I wonder if it is any different other than thickness.

 

[HoosierBuddy]

The yellow tape is thicker and speced for gas.

Does it work better than white for gas? In my experience, neither of them work nearly as well as a good quality pipe sealant.

Retorseal #5 remains my "Go To"....but I'm currently experimenting with a stick type sealant. You basically take off the cap and rub it around the threads. It has the same advantages of teflon tape in that it's easy to carry, requires no stirring, and doesn't create a mess.

So far I like it, but I need to use it for another year or so before I'd recommend it fully.

 

[Firebrick43]

You can buy yellow, white, green, orange, or red tape all rated for fuels and either in 3.5 mil or 4 and in 1/4” up to I think 1.5” wide.

MOST of the time gas is 4 mil but you can buy it in 3.5 mil

MOST of the time white is 3.5 mil but you can buy it in 4 mil and thinner as well at 3 mil or super thick at 10 Mil

Blue monster is 3.5 mil.

With the quality of pipe and iron fittings so low now it’s always tape and dope.

I do use yellow tape on gas line because inspectors generally don’t know their *** from a hole in the ground.

I use rector seal #5 personally but the company generally buys gasoila which works fine but is even worse to get off your hands.

 

[Rc_Guy]

Honestly?

I am beginning to think of teflon tape the same as I do "Silicone Dilectric Compound' and "Anti-Seize Compound".

Next time I come across a roll of that stuff out in the garage, it's going straight into the garbage.

Why? 26 years of using dope and Teflon tape and never having a leak on the sprinkler pipe, I’ll keep using Teflon tape.

 

[American Locomotive]

Looking at the Oatey datasheet, it says the yellow gas tape is nearly twice as dense as the regular tape. That's the only major difference I can see. Maybe the higher density makes it less permeable to natural gas? That's the only thing I can think of.

 

[BrandonV]

As other have stated I think it's just a thickness/density thing.

I also tend to think it's a way for municipalities to see if whoever did the work could read their requirements (if called out).

 

[cannuck]

There can be differences in thickness AND density. I find gas tape does not pull down into the threads and lock in place whereas the less dense tapes can do just that. The whole purpose of the tape is to have the thread cut it apart and block the gap at the bottom of thread groove. Male threads not as deep as female (and I'll just throw that straight line out for someone else to run with). Most thread failures are result of not wrapping properly, or tape too thin for the size of fitting. We use very light white stuff on 1/8 and 1/16NPT fittings, petrotape on 1/4 to 1, and crossover is gas tape sometimes at 1 1/2" and most of time at 2". We are sealing either high vacuum or low pressure but fairly warm oil.

 

[billt460]

One thing that has not been mentioned is how many revolutions of wrap are recommended?

 

[mike93lx]

One thing that has not been mentioned is how many revolutions of wrap are recommended?

Min of 3 is what I've always seen

 

[Rc_Guy]

One thing that has not been mentioned is how many revolutions of wrap are recommended?

I do about 2 1/2 wraps

 

[Packard V8]

My favorite plumber uses both viscous sealant and tape. He says, "If there is a leak, it won't be because I didn't use enough sealant.

jack vines