M is thinner than L and will not last as long. The M copper in my home lasted for 17 years before it started developing pinhole leaks. I had the affected pipes replaced with L. Answer from zlandar on reddit.com
A Messe Supply
amessesupply.com › 1-M-Type-Copper-Pipe
1" M-Type Copper Pipe
A. Messe Supply offers Copper Pipe, Type-M, 1", Priced Per Foot, Only Sold in 10' or 20' Lengths and other plumbing and heating supplies
The Home Depot
homedepot.com › p › 1-in-x-10-ft-Copper-Type-M-Rigid-Pipe-MH10010 › 202287131
MUELLER STREAMLINE CO. 1 in. x 10 ft. Copper Type M Rigid Pipe MH10010 - The Home Depot
Use this Mueller Streamline Copper Type M Rigid Tubing as a water supply line in your home. Features durable construction.
Type M copper for whole house repipe?
M is thinner than L and will not last as long. The M copper in my home lasted for 17 years before it started developing pinhole leaks. I had the affected pipes replaced with L. More on reddit.com
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December 12, 2023Do I have Type M or L copper?
L copper has blue lettering and M copper has red lettering. More on reddit.com
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June 24, 2024Copper re-pipe type L/M
In places with bad water quality L is much better and will buy you an extra 10-20 years of life. If you have decent water quality type m can still last 30-50 years easily, but only if properly installed. Number one failure is caused by not reaming the pipe, this causes cavitation in the water which will cause pinholes eventually. This will happen to L also if not reamed but will take much longer. From there it is a preference issue. More on reddit.com
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June 18, 2022Type L vs M copper pipe?
Same o.d., same fittings, you won't notice a difference in flow from the change in i.d. More on reddit.com
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September 22, 2021Family Handyman
familyhandyman.com › home › skills › plumbing › pipes
Differences Between Type L and Type M Copper Pipes
September 10, 2025 - But for normal in-wall household plumbing, Type M works fine. When it comes to copper piping for water lines, acidic water with a pH of seven or less can be hard on copper pipes. If you have a well and find out from testing that the water is acidic, you may want to use the thicker-wall Type L pipe or plastic CPVC pipe and fittings.
COPPERTUBINGSALES
coppertubingsales.com › collections › hard copper lengths 20 ft › 1 type m hard copper 20 ft lengths
1" TYPE M Hard Copper 20 FT Lengths — COPPERTUBINGSALES
1 TYPE M Hard Copper 20 FT Lengths
Additional freight required to ship 20 ft lengths
Manufactured to spec ASTM B88 is the Standard Specification for Seamless Copper Tube , ANSI/NSF Standard 61 Drinking Water System Components.
All of the specifications require a minimum copper plus silver content of 99.9% and phosphorus content between .015 - .040%. As indicated by the
· compositional requirements, the copper tube is essentially lead free.
NSF 61 , Alloy C12200
Called by the NOM ID size Type M is used for domestic water-, service and distribution-, fire protection-, solar-, fuel and oil-, HVAC-, compressed air-, oxygen-
Price $162.33
Reddit
reddit.com › r/askaplumber › type m copper for whole house repipe?
r/askaplumber on Reddit: Type M copper for whole house repipe?
December 12, 2023 -
I just had a 3rd plumber come out to give me an estimate to replace galvanized and he said they use type M copper. The other 2 said they use type L copper. I'm pretty sure type M isn't even allowed here (Chicago).
Do you think type M is fine for residential supply? He said they could do type L if I really want but it would be "probably $800 more.". He said M is fine and will last 50 years+. Still waiting for his overall quote to compare with the other 2, but I think he will be the lowest bid.
For what it's worth my whole basement is exposed ceiling (easy repairs), but it may be finished eventually.
Top answer 1 of 12
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M is thinner than L and will not last as long. The M copper in my home lasted for 17 years before it started developing pinhole leaks. I had the affected pipes replaced with L.
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My house was built in 1976 and has type M have never had a single issue. Replace shower valves cut and soldered just fine. Unless it's a recirc line, you'd be fine with M. Since the 80s I've done 100s of house in M until we switched to pex.
Menards
menards.com › main › plumbing › pipe-fittings › copper-pipe-tubing-fittings › type-m-copper-straight-pipe › 21469 › p-1444426322826-c-8565.htm
1"x10' Type M Copper Straight Pipe at Menards®
1"x10' Type M Copper Straight Pipe
This product is a 1" X 10' Type M Copper Pipe.
Price $48.99
Southernstates
southernstates.com › southernstatescoop › mueller type m tubing, 1 in, 20 ft l, copper
Mueller Type M Tubing, 1 in, 20 ft L, Copper
Mueller Type M Tubing, 1 in, 20 ft L, Copper
Streamline® Copper Solder-Joint Fittings for supply/pressurized systems have been the leading brand of copper fittings for over 80 years. Available in both wrot copper and cast bronze, our product selection has grown to become the most extensive in the industry. We are the acknowledged experts at engineering and manufacturing precision solder-joint copper fittings. Quality, consistency and reliability have made the Streamline® brand trusted and specified all around the world.
For use in above-ground potable water supply systems · Constructed of high-grade copper or bronze materials · Made to a
Price $99.99
HD Supply
hdsupplysolutions.com › home › plumbing › sinks & repair › sink repair › other repair parts
Mueller Streamline 1 In X 10 Ft Copper Type M Rigid Pipe | HD Supply
Mueller Streamline 1 In X 10 Ft Copper Type M Rigid Pipe
1"x10' CPR TYPE M RGD TUBING. Copper Construction Provides Durability. Rigid Tubing. For Use Where Systems Will Not Exceed 150° F. Maximum Working Pressure Of 580 Psi. Suitable For Use As A Water Supply Line. Rated For Underground Use. Iapmo Certified. Nsf Listed. MFG# MH10010
Price $61.16
Amazon
amazon.com › Mueller-Industries-MH04002RT-Idx2-Copper › dp › B001AH5BDS
Amazon.com: Mueller MH04002RT 1/2" Idx2' Copper M Pipe, ID x 2 Ft : Industrial & Scientific
Amazon.com: Mueller MH04002RT 1/2" Idx2' Copper M Pipe, ID x 2 Ft : Industrial & Scientific
Ferguson
ferguson.com › product › 1-in.-x-20-ft.-type-m-hard-tubing-mhardg20 › 946.html
1 in. x 20 ft. Type M Hard Tubing | Ferguson
End Connection 1: Sweat · End Connection 2: Sweat · End Connections: Sweat · FM Approved: No · Length: 20 ft · Material: Copper · Material Type: C12200 · NSF: NSF 61, NSF 61G · NSF Certified: Yes · Origin: Domestic · PipeTubing Size: 1 in · Product Type: Copper Tube, Type M ·
APEX Supply Co.
apexsupplyco.com › home › copper straight pipe (type m)
Copper Straight Pipe (Type M) – APEX Supply Co.
Copper Straight Pipe (Type M)
The Copper Straight Pipe (Type M) is a durable and reliable plumbing component commonly used for water distribution in residential and commercial applications. Made of high-quality copper, this pipe ensures long-lasting performance and corrosion resistance. Material: Copper Size: 1/2 inch diameter Pressure Rating: 300 PSI Compatible with soldering or compression fittings At Apex Supply Company we offer local pickup or delivery, and nationwide shipping.
Price $1.86
Lowe's
lowes.com › plumbing › pipe & fittings › copper pipe & fittings
1-in x 10-ft Copper Type M Pipe in the Copper Pipe & Fittings department at Lowes.com
November 5, 2020 - Produced from high quality copper for maximum reliability · Copper pipe and tube are recyclable · Specifications · Reviews · 5 ( 1 ) Community Q & A ·
PlumbingSupply.com
plumbingsupply.com › home › categories › pipe & tubing
High-Quality Copper Pipe - Type L and M Options
Purchase rigid type M copper pipe and type L copper piping. Available in 1/2", 3/4", 1", 1-1/2", 1-1/4", 2", 2-1/2", 3" and 4" nominal sizes
Cooneybrothers
cooneybrothers.com › userfiles › files › cooneybrothers_typemcoppertubedimensions.pdf pdf
Type M Copper Tube Dimensions
1 · For more information, please visit cooneybrothers.com or contact 610-272-2100. Type M Copper Tube Dimensions · Nominal · Size · Actual · Outside · Diameter · Wall · Thickness Weight · Volume of Tube, per Linear Foot · (inches) (inches) (inches) (lb/ft) (cu.
The Home Depot
homedepot.com › plumbing › pipe & fittings › pipe › copper pipe
1" - Copper Pipe - The Home Depot
Get free shipping on qualified 1" Copper Pipe products or Buy Online Pick Up in Store today in the Plumbing Department.
Apollo Plumbing
apolloplumbing.net › home › apollo services › plumbing repairs everett, wa › copper pipe repair › type l vs type m copper: key differences
Type L vs Type M Copper: Key Differences | Apollo Plumbing
June 16, 2025 - Check the color and markings on the pipe. Blue = Type L, Red = Type M. In some areas, yes. But many codes prefer or require Type L for pressure lines. Rigid is more common, but flexible works well in tight spaces or remodels. Each copper pipe type serves a purpose.
Price $$
Address 1239 State Ave., 98270, Marysville
Quora
quora.com › What-is-type-m-copper-pipe-used-for
What is type m copper pipe used for? - Quora
Answer (1 of 2): Type m is usually used for plumbing in a residential plumbing job. The thickness of copper is as folliws: type k for direct burial in the ground permissible for buried natural gas, type L this is used on high pressure systems ...
PexUniverse
pexuniverse.com › 1-inch-x-10ft-copper-pipe-type-m
1" x 10ft Straight Copper Pipe, Type M - Mueller
1" x 10ft Straight Copper Pipe, Type M
1" x 10 ft long, type M, straight copper pipe by Mueller Streamline.
Features: Top quality, Made in the USAManufactured to ASTM B88 standard from C12200 grade (99.9% pure) copperMeets NSF/ANSI 61-G and 372 for drinking water systemsUniversally compatible with variety of fittings & connection systems: sweat (soldering/brazing), press (Apollo X-Press, Viega ProPress, Everhot Press, etc.), push-to-connect (SharkBite, OmniGrip, etc.), compression and others.
Technical Specifications: Size: 1" CTS/Nominal (1.125" OD, 1.055" ID, 0.035" Wall Thickness)Length: 120" (10ft)Copper Pipe Type: M, Straight
Price $52.95
SiteOne
siteone.com › all products › irrigation › pipe & tubing › copper
Hard Copper Pipe Type M 1 in. x 10 ft | SiteOne US
Hard Copper Pipe Type M 1 in. x 10 ft.
Price $7.81
Reddit
reddit.com › r/askaplumber › do i have type m or l copper?
r/askaplumber on Reddit: Do I have Type M or L copper?
June 24, 2024 -
The copper on the left is a 1/2 cut out I have from a new angle stop install. The copper on the right is 2’ stick of Type M copper I bought from Home Depot a few months ago. The cooper on the left looks much thicker, however, I took my cut out (on the left) into Home Depot to compare to actual Type L and it looks thinner and closer to the Type M on the shelf. Do I have Type L with some wear of the inner walls (it’s an old house) or do you think I have Type M but the piece I bought on the right is just extremely thin? Thank you!