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
Family 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.
The Home Depot
homedepot.com › plumbing › pipe & fittings › pipe › copper pipe
Type M - Copper Pipe - The Home Depot
Get free shipping on qualified Type M Copper Pipe products or Buy Online Pick Up in Store today in the Plumbing Department.
Do 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 22, 2024Type 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, 2021Type 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, 2023Type M or L copper for hot water heater supply and output? Any risk in using new type L and coupling to existing type M?
At one point, not that long ago, code here used to be Type L for domestic water lines, Type M was used for heating only. Now, it’s Type M for anything… More on reddit.com
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May 29, 2022Videos
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Different types of copper pipe for plumbing - YouTube
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Mathematics for Plumbers and Pipefitters - Unit 9 Copper Tubing ...
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Types of Copper Pipe - YouTube
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.
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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.
The Motley Fool
fool.com › investing › stock-market › market-sectors › materials › metal-stocks › copper-stocks
5 Best Copper Stocks to Consider in 2026 | The Motley Fool
1 day ago - Anyone can buy copper stocks. Here's a step-by-step guide on how to add one to your portfolio: Open your brokerage app: Log in to your brokerage account where you handle your investments. Search for the stock: Enter the ticker or company name into the search bar to bring up the stock's trading page. Decide how many shares to buy: Consider your investment goals and how much of your portfolio you want to allocate to this stock. Select order type...
PexUniverse
pexuniverse.com › copper-pipe-dimensions-specs
K, L, M Copper Pipe Dimensions & Technical Specifications - PexUniverse
OD - Outside Diameter; for copper pipe, OD is always 1/8" larger than CTS size. For example, the OD of 1/2" CTS pipe would be 5/8" and for 1" CTS pipe would be 1-1/8". ID - Inside Diameter Wall Thickness - denotes the thickness of the pipe wall. The main difference between L, M and K type copper pipes are their wall thickness.
Fixed Today Plumbing
fixedtoday.com.au › fixed today › blog › type i type m copper pipes
The Differences Between Type l And Type M Copper Pipes ‐ Fixed Today
March 5, 2025 - Copper piping is recycled into numerous other materials at the same metal purity, making it sustainable and cost-effective. With soft copper pipes, you can easily shape and bend them without using tools. On the other hand, rigid copper pipes demand specialised tools for cutting and joining. ... Four commonly used copper pipes are used in residential and commercial plumbing: Type K, Type L, and Type M.
COPPERTUBINGSALES
coppertubingsales.com › collections › type m hard copper pipe 20 ft. lengths › 1/2 type m hard copper 20 ft lengths
1/2" TYPE M Hard Copper 20 FT Lengths — COPPERTUBINGSALES
1/2 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 $40.60
Amazon
amazon.com › Watts-Pre-Copper-Tubing-Type › dp › B001AH3CA2
Amazon.com: Mueller 3/4 in. Dia. x 2 ft. L Type M Copper Water Tube : Industrial & Scientific
VENTRAL Copper Pipe Type M - Custom Size and Length 1/2" (0.50) 3FT Feet
Ferguson
ferguson.com › pipe & tubing › copper tubing › type m tubing
Type M Copper Pipe | Ferguson
Skip to main content Skip to footer content · Home / All Products / Pipe & Tubing / Copper Tubing / Type M Tubing · 14 Products Close · In Stock · Brooklyn, 8805 18th Avenue · Type M Hard 14 14 Products Type M Hard · There are no matching search results.
Lowe's
lowes.com › plumbing › pipe & fittings › copper pipe & fittings
Streamline 3/4-in x 5-ft Copper Type M Pipe MH06005 at Lowes.com
Some exclusions apply.Learn More · Streamline® Copper Tube sets the standard for quality, consistency and service in the plumbing industries. Copper Type M Pipe is perfect for residential services. Used for its thicker wall tube and its rigidity ...
Continental Steel
continentalsteel.com › all categories › copper and brass › tubing and pipe › copper water tube - type m › view items
Copper Water Tube - Type M
Copper Water Tube - Type M Tubing and Pipe · /Asset/Copper-Tubes.jpg · Close Window · 20' Straight Lengths Specifications: CDA 122 ASTM B88 UNS C12200 Nominal Composition: Copper: 99.9% Phosphorus: .02% 1 - 10 of 10 | Results Per Page · 25 · 50 · 100 ·
Grainger
grainger.com › product › STREAMLINE-Tubing-Copper-22FC81
Tubing: Copper, 4 in, Type M, 10 ft, Straight
We cannot complete your request due to a technical difficulty. You may return to the previous page or go to the homepage and explore other options. For immediate assistance please call us
NuComfort
nucomfort.com › 1-1-2-x-10-type-m-copper-tubing › 83333
1-1/2" X 10' TYPE M COPPER TUBING | 83333
Close menu · Show all categories Copper Pipe Back · Show Copper Pipe · Generic · Product Number: 83333 · Manufacturer Code: 1-1/2X10 M Please login to see prices · Specifications · Close menu · General Information · Description · Close menu · Close menu ·
Andrew Sheret Limited
sheret.com › account › catalog › categories › pipe-tubing-hoses › copper-pipe › type-m-copper-pipe
Type M Copper Pipe | Shop Online Andrew Sheret Limited
Shop Type M Copper Pipe products from family-owned BC company Andrew Sheret Limited. Pickup in-store or delivery options.
Pace Supply
pacesupply.com › Product › COPM6
Type M Copper Tubing, 6 in (6-1/8 in OD), 20 ft L, Coil
We cannot provide a description for this page right now
Ferguson
ferguson.com › product › 1-1 › 4-in.-x-20-ft.-type-m-hard-tubing-mhardh20 › 37078.html
1-1/4 in. x 20 ft. Type M Hard Tubing | Ferguson
Copper · Material Type: C12200 · NSF: NSF 61, NSF 61G · NSF Certified: Yes · Origin: Domestic · PipeTubing Size: 1-1/4 in · Product Type: Copper Tube, Type M · UPC: 685768236320 · Wall Thickness: 0.042 in · 0 · View All · Ferguson.com no longer supports Internet Explorer.
Menards
menards.com › main › plumbing › pipe-fittings › copper-pipe-tubing-fittings › type-m-copper-straight-pipe › 21400 › p-1444426323815-c-8565.htm
1/2"x10' Type M Copper Straight Pipe at Menards®
1/2"x10' Type M Copper Straight Pipe
This product is a 1/2" X 10' Type M Copper Pipe.
Price $19.96
The Home Depot
homedepot.com › p › Mueller-Streamline-1-2-in-x-2-ft-Copper-Type-M-Pipe-MH04002 › 100553697
Mueller Streamline 1/2 in. x 2 ft. Copper Type M Pipe MH04002 - The Home Depot
Enjoy the MUELLER STREAMLINE 1/2 in. x 2 ft. Copper Type M Pipe MH04002, durable used mainly behind walls inside a residence, routes water from a service line and water heater to a fixture from The Home
Westlake Ace Hardware
westlakehardware.com › home › what do the letters ‘k,’ ‘l’ and ‘m’ on copper tubing mean?
What do the letters 'K,' 'L' and 'M' on copper tubing mean? - Westlake Ace Hardware
October 13, 2020 - Type K is the heaviest. Type L is medium weight and used most often for water lines in homes. Type M is thinner and is used underground or for light
PexUniverse
pexuniverse.com › copper-pipe
Copper Pipe, L & M types - Sold by Ft - PexUniverse
Mueller Streamline brand (made in the USA) standard Type L & Type M hard-drawn copper pipes in sizes from 1/2" to 2" and variety of lengths. For common plumbing (hot and cold water), heating (boilers, baseboards/radiators) and other applications.