Will Phyn Plus Fit Your Home?

Let's find out in 3 easy steps. Phyn Plus works with standard 3/4", 1" and 1 1/4" main water lines. Use this guide to check your compatibility in minutes.

DOWNLOAD YOUR FREE PIPE SIZER

Step 1: Find Your Main Water Shutoff Valve

Your Phyn Plus is installed on the main water line right after your home's shutoff valve.

Your main shutoff is almost always the first valve on the pipe that enters your home after the water meter. Find the meter box in your yard or sidewalk and follow that pipe to your house. This is the surest way to find the right pipe to measure.

Now that you're on the right pipe, look for the valve in one of the common spots:

  • Garage: On a wall adjoining the house.
  • Outdoors: On an exterior wall.
  • Basement: Near the front foundation wall.
  • Utility Closet: Near your water heater.

What to look for:

  • Gate Valve: Has a round, wheel-like handle. Turn it clockwise to close.
  • Ball Valve: Has a straight, level like a handle. Give it a quarter-turn to shut off the water water.
Confirm the Water is Off

Confirm the Water is Off

After turning the valve handle, go to any faucet (the bathtub is a good choice) and turn on the cold water. It should slow to a trickle and then stop completely. This confirms you've closed the main valve successfully.
A Caution on Older Valves

A Caution on Older Valves

If you have an old, round-handled Gate Valve that looks corroded, turn it slowly and gently. These can sometimes get stuck or break.

Step 2: Identify Your Pipe Type

Knowing your pipe material is essential for getting the correct fittings. Use your phone's camera flash for a clear look. Here are the four most common types:

Copper

Looks Like: Metal that is the color of a penny. It can be dull brown or have a green patina if older.

Plumber's Trick: Lightly scratch a small spot with sandpaper; it will shine like a new penny.

PEX

Looks Like: Flexible plastic tubing, often colored red, blue, or white.

Plumber's Trick: The key identifier is its flexibility. If the pipe makes gentle bends without fittings, it's PEX.

CPVC

Looks Like: A rigid plastic pipe, typically a light-yellow or cream color.

Plumber's Trick: Do not confuse this with brilliant white PVC pipe used for drains. CPVC is specifically for hot and cold drinking water.

Galvanized Steel

Looks Like: A dull, battleship-gray colored metal pipe. Common in homes built before the 1970s.

Plumber's Trick: An easy test: a magnet will stick firmly to galvanized steel, but not to copper.

Step 3: Measure Your Pipe & Check Compatibility

Now for the final check. Use our tool to find your size instantly.

A Quick Plumber's Note on "Pipe Size"

In plumbing, a pipe's name (e.g., "3/4 inch pipe") is its "nominal size," not its actual measurement. The good news is our printable sizer does all the math for you. Just wrap it around the pipe to find the correct nominal size.

1

Download & Print the Sizer: Download the Pipe Sizer Document

DOWNLOAD THE PIPE SIZER
IMPORTANT: PRINT AT 100% SCALE

IMPORTANT: PRINT AT 100% SCALE

When you print, your printer settings for "Page Scaling" must be set to "100%" or "Actual Size." If you use "Fit to Page," your measurement will be incorrect.
2

Cut & Wrap: Cut out the sizer and wrap it snugly around your main water pipe.

3

Read your size: Read the number where the tape overlaps with the 0" line

So Will It Fit?

Yes, You are compatible!

Yes, You are compatible!

If your pipe measures 3/4", 1", or 1 1/4", you're ready for the next step.
NOT A STANDARD FIT

NOT A STANDARD FIT

If your pipe is a different size, Phyn Plus may not be compatible. Please contact our support team to discuss potential solutions.

Step 4: Get the Right Fittings for a Smooth Installation 

You're almost there! Now, let's build your shopping list. 

Pipe Type
Copper
Pipe Size
3/4"
Standard Fittings
(2) 3/4" Copper (Solder) x 3/4" MNPT Male Adapters
Push-to-Connect Alternative
(2) 3/4" Push-to-Connect x 3/4" MNPT Male Adapters
Pipe Type
Copper
Pipe Size
1"
Standard Fittings
(2) 1" Copper (Solder) x 1" MNPT Male Adapters
Push-to-Connect Alternative
(2) 1" Push-to-Connect x 1" MNPT Male Adapters
Pipe Type
Copper
Pipe Size
1 1/4"
Standard Fittings
(2) 1 1/4"" Copper (Solder) x 1 1/4"" MNPT Male Adapters
Push-to-Connect Alternative
(2) 3/4" Push-to-Connect x 3/4" MNPT Male Adapters
Pipe Type
PEX
Pipe Size
3/4"
Standard Fittings
(2) 3/4" PEX (Crimp) x 3/4" MNPT Male Adapters
Push-to-Connect Alternative
(2) 3/4" Push-to-Connect x 3/4" MNPT Male Adapters
Pipe Type
PEX
Pipe Size
1"
Standard Fittings
(2) 1" Copper (Solder) x 1" MNPT Male Adapters
Push-to-Connect Alternative
(2) 1" Push-to-Connect x 1" MNPT Male Adapters
Pipe Type
PEX
Pipe Size
1 1/4"
Standard Fittings
(2) 1 1/4" PEX (Crimp) x 1 1/4" MNPT Male Adapters
Push-to-Connect Alternative
(2) 1 1/4" Push-to-Connect x 1 1/4" MNPT Male Adapters
Pipe Type
CPVC
Pipe Size
3/4"
Standard Fittings
(2) 3/4" CPVC (Solvent) x 3/4" MNPT Male Adapters
Push-to-Connect Alternative
(2) 3/4" Push-to-Connect x 3/4" MNPT Male Adapters
Pipe Type
CPVC
Pipe Size
1"
Standard Fittings
(2) 1" CPVC (Solvent) x 1" MNPT Male Adapters
Push-to-Connect Alternative
(2) 1" Push-to-Connect x 1" MNPT Male Adapters
Pipe Type
CPVC
Pipe Size
1 1/4"
Standard Fittings
(2) 1 1/4" CPVC (Solvent) x 1 1/4" MNPT Male Adapters
Push-to-Connect Alternative
(2) 1 1/4" Push-to-Connect x 1 1/4" MNPT Male Adapters
Pipe Type
Galvanized
Pipe Size
All
Standard Fittings
See note below
Push-to-Connect Alternative
See note below

A Note on Galvanized Steel: Working with old galvanized pipe is very difficult and can cause other leaks if not done correctly. We strongly recommend you hire a professional plumber for any installation on a galvanized system.


Ready to Protect Your Home?

You've done the prep work. Now take the next step in preventing water damage and saving water.

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