If you’ve heard a plumber mention a “shark bite” fitting — or you’ve seen it written online as “snake bite” or “gator bite” — you’re actually looking at the same thing: a SharkBite fitting, one of the most popular push-to-connect systems used with PEX, copper, and CPVC pipe. In this guide, I’ll walk you through exactly what these fittings are, the different SharkBite systems available, how they compare to crimping and pressing, and — just as importantly — when a licensed plumber would actually recommend using them and when they wouldn’t.
A SharkBite fitting is a push-to-connect plumbing fitting that lets you join PEX, copper, or CPVC pipe without soldering, gluing, or crimping tools. They’re reliable for repairs and accessible sections of plumbing, but many licensed plumbers prefer crimp or press fittings for permanent, hidden, or under-slab connections because they trust a mechanically secured joint over a slip-fit one long-term.
What Is a SharkBite Fitting?
A SharkBite fitting is a push-to-connect (also called push-fit) plumbing connector. Instead of soldering copper, gluing CPVC, or crimping a ring onto PEX, you simply push the pipe into the fitting. Inside, a stainless-steel toothed collet grips the pipe, while an O-ring creates the watertight seal.
This is why the design earned nicknames like “shark bite,” “snake bite,” and “gator bite” — the internal teeth “bite” into the pipe to hold it in place. Whatever term you’ve heard, they all refer to the same push-to-connect fitting technology.
Why Plumbers and Homeowners Use Them
- No torch, glue, or crimping tool required — you can make a connection in seconds.
- Work across mixed pipe materials, so you can join PEX directly to copper or CPVC in the same fitting.
- Easy to remove and reuse in some models, which is useful for repairs and emergency shut-offs.
- A practical option when a section of pipe is hard to access with soldering or crimping equipment.
The Main SharkBite / PEX Fitting Systems
Not all SharkBite and PEX fittings work the same way. Here’s how the main systems compare:
SharkBite Max / Push-to-Connect
Tool-free, universal fitting compatible with PEX, copper, and CPVC. Best for repairs and accessible connections.
EvoPEX
A PEX-only push-to-connect system with a green visual indicator, designed for new construction runs.
PEX Press
Uses a dedicated pressing tool on a pre-attached stainless steel sleeve for a fast, mechanically secured joint.
PEX Crimp / Clamp
The traditional, budget-friendly method using copper crimp rings or stainless clamps over barbed fittings.
Pricing for these fittings generally falls between roughly $2 and $34 per piece or multipack, depending on the size and system you choose.
Do Professional Plumbers Use SharkBite?
Yes — but selectively. Many licensed plumbers keep SharkBite fittings in their truck for emergency repairs, tight-access spots, or temporary fixes, because they save time and don’t require a torch near flammable materials. Where opinions split is on permanent, hidden, or under-slab installations.
Why Some Plumbers Say Not to Use SharkBite
Common Concerns
- Push-to-connect fittings rely on an O-ring seal and a slip-fit design, which some plumbers feel is less permanent than a soldered, pressed, or crimped joint.
- They can be harder to inspect once buried behind a wall, under a slab, or underground.
- They cost more per fitting than traditional crimp connections, which adds up on larger jobs.
- If the pipe isn’t cut squarely or deburred properly before insertion, the seal can be compromised.
None of this means SharkBite fittings are unsafe when installed correctly — it simply explains why many plumbers reserve them for accessible, serviceable locations rather than permanent concealed runs.
PEX-A vs. PEX-B: Which One Should You Use?
SharkBite and most push-to-connect fittings work with both PEX-A and PEX-B, but the pipe types themselves aren’t identical.
PEX-A
- More flexible, easier to bend around tight corners
- Expansion fittings can self-heal small marks
- Typically the pricier option
PEX-B
- Stiffer, more resistant to chlorine and oxidation
- Widely compatible with crimp and clamp systems
- Generally more budget-friendly
How to Tell If Your PEX Is A or B
Look at the printed markings along the length of the pipe — most manufacturers print “PEX-A” or “PEX-B” directly on the tubing. You can also check flexibility: PEX-A is noticeably more pliable and coils tighter without kinking compared to the stiffer PEX-B.
Is It Better to Crimp PEX or Use SharkBite?
This depends on the job. Here’s how I’d break it down:
Choose SharkBite when:
- You need a fast repair or shut-off
- The connection stays accessible for future inspection
- You’re joining different pipe materials
Choose Crimp/Press when:
- The connection will be permanently hidden
- You want the lowest cost per fitting on a large job
- You want the joint type most commonly specified for new construction
How Long Do SharkBite Fittings Last on PEX?
Manufacturers design SharkBite fittings to last for the working life of a residential plumbing system when installed correctly on approved pipe. In practice, longevity depends heavily on installation quality — a properly deburred, squarely cut pipe pushed fully into the fitting will perform far better than a rushed connection. For concealed or underground PEX-B runs, periodic inspection (where accessible) is still a good habit, since any push-fit connection is easier to service if you can reach it.
A Note on Insurance and Local Code
Some insurance providers and local building departments have specific requirements around visible, exposed, or under-slab plumbing connections. Before finalizing your fitting choice — especially for concealed or under-slab work here in Miami-Dade — it’s worth confirming what your local code and insurer expect. A quick call to a licensed plumbing service can save you from a costly rework later.
Watch: How SharkBite PEX Fittings Are Installed
If you’re a visual learner, this walkthrough shows the installation process step by step:
Want a couple more angles on the process? Here are two additional installation walkthroughs worth watching:
Should You DIY This, or Call a Plumber?
SharkBite fittings are genuinely DIY-friendly for small, accessible repairs — swapping a shut-off valve or fixing a leaking joint under a sink, for example. But for anything involving a new water heater line, a whole-house repipe, or a connection that will end up hidden inside a wall or under a slab, it’s worth having it done right the first time. If you’re in the Miami area and want a second opinion before you start, our team at Miami Florida Plumbing can walk you through the best fitting choice for your specific job — including situations like a water heater replacement where the wrong fitting choice can cause bigger problems down the line.
Frequently Asked Questions
Why do plumbers say not to use SharkBite?
Mainly because push-to-connect joints rely on an O-ring seal rather than a soldered, pressed, or crimped bond, which some plumbers see as less ideal for permanent or hard-to-inspect locations.
Do SharkBite fittings work well on PEX?
Yes, SharkBite fittings are designed to work with PEX-A and PEX-B pipe and create a secure, tool-free connection when the pipe is cut and inserted correctly.
How long do SharkBite fittings last on PEX?
They’re built for long-term residential use when installed properly, though accessible connections are always easier to monitor over time than concealed ones.
How to tell if SharkBite PEX is A or B?
Check the printing along the pipe, which usually states “PEX-A” or “PEX-B” directly. PEX-A also feels noticeably more flexible than the stiffer PEX-B.
Is it better to crimp PEX or use SharkBite?
Crimping is usually preferred for permanent, hidden connections and larger jobs where cost matters, while SharkBite is better suited to repairs and accessible spots that may need future servicing.
Do professional plumbers use SharkBite?
Many do, particularly for repairs and emergency work, while reserving crimp or press fittings for permanent, concealed installations.
Is it better to use PEX-A or PEX-B?
It depends on your project — PEX-A offers more flexibility and easier routing around tight bends, while PEX-B tends to be more affordable and resistant to chlorine and oxidation.
Why don’t insurance companies like PEX plumbing?
Some insurers apply extra scrutiny to certain plumbing materials or installation methods, especially for concealed or under-slab work. Requirements vary by provider, so it’s best to confirm directly with your insurer and check local code before installation.
What’s the difference between SharkBite PEX-A and PEX-B?
The fitting itself works with both, but the pipe types differ — PEX-A is more flexible with expansion-style memory, while PEX-B is stiffer and often paired with crimp connections.
Not Sure Which Fitting Is Right for Your Home?
Our licensed Miami plumbing team can help you choose the safest, code-compliant option for your project — whether it’s a quick repair or a full repipe.
