Custom Pipe Markers: When You Need Them and How to Order Them
Standard pipe markers cover a lot of ground. Green/white for water. Brown/white for gas. Red/white for fire. Most of the pipes in a typical mechanical room are covered by those standard labels.
But not all of them.
What about the steam condensate return line? The glycol cooling loop? The solar thermal fluid supply? The medical air system?
Some pipes need a label that doesn't exist in a standard catalog. That's where custom pipe markers come in.
This guide explains when to use custom pipe markers, what to put on them, and how to get them right the first time.
What Is a Custom Pipe Marker?
A custom pipe marker is a pipe label with text, colors, or sizes that go beyond what's available in a standard product catalog.
Custom markers can have:
- Custom text — any pipe content description you need
- Standard ASME A13.1 colors — same color combinations as standard markers
- User-defined colors — color combinations not in the standard system
- Custom sizes — non-standard dimensions for unusual pipe sizes
- Additional information — pressure ratings, temperature ranges, hazard symbols
The label itself is the same self-adhesive vinyl as a standard pipe marker. The difference is the content printed on it.
When Do You Need a Custom Pipe Marker?
Here are the situations where standard labels don't cut it:
1. Non-Standard Pipe Contents
Standard pipe marker catalogs carry the most common pipe contents — chilled water supply, chilled water return, hot water supply, natural gas, compressed air, and similar.
But plenty of real pipe systems don't fit those labels. Common examples:
- Steam condensate return — often not stocked in every variant
- Glycol heating/cooling loops — ASME A13.1 says glycol can be green or yellow depending on concentration and hazard — check your specific application
- Solar thermal fluid supply and return — newer systems not always in standard catalogs
- RO (reverse osmosis) water — treated water with specific identity requirements
- Process water — industrial applications with specific fluid names
- Specific chemical names — "Sulfuric Acid" vs. generic "Acid"
If you can't find a standard label that says exactly what you need, you need a custom marker.
2. User-Defined Colors Under ASME A13.1
ASME A13.1 allows facilities to create their own color categories for pipe systems that don't fit the standard 7 colors.
For example, a food and beverage plant might want a specific color for product lines vs. cleaning solution lines — both of which are technically "safe" but need to be visually distinct from each other.
A hospital might define a specific color for vacuum exhaust that's different from compressed air.
If your facility has a user-defined color in the pipe marking plan, you need custom markers to match that color.
3. Bilingual or Multi-Language Labels
Facilities with non-English-speaking workers sometimes need labels in two languages.
A label that reads "Natural Gas / Gas Natural" is a custom marker. So is one that reads "Chilled Water Supply / Suministro de Agua Fría."
This is increasingly common in manufacturing facilities, food processing plants, and agricultural settings.
4. Specific Hazard Information
Some facilities want to include additional information beyond just the pipe content name:
- Temperature — "Hot Water Supply — 180°F"
- Pressure — "Steam Supply — 150 PSI"
- Hazard symbols — flame, skull, corrosive icons
- CAS numbers — for specific chemicals in laboratory or industrial settings
Standard labels don't carry this extra data. Custom markers do.
5. Unusual Pipe Sizes
ASME A13.1 standard sizes cover pipes from ¾" OD up through large industrial headers. But some applications need non-standard dimensions:
- Very small-diameter instrumentation tubing
- Unusual pipe shapes or profiles
- Large-diameter storage tank lines that exceed standard label widths
Custom labels can be made to any dimension needed.
6. Matching an Existing Facility System
If you're adding to an existing pipe system that already has custom labels — with specific fonts, a specific color shade, or a facility logo — you need matching custom markers to keep the system consistent.
Inconsistent labels in the same mechanical room look unprofessional and can confuse workers who learn to read one style of label and then encounter a different one.
What to Put on a Custom Pipe Marker
At minimum, a custom pipe marker should include the same three things required by ASME A13.1:
- The name of the pipe contents — in plain English, clearly written
- The correct background color — matching the ASME A13.1 category for the contents
- Flow direction arrows — either integrated into the label or as separate arrow labels
Beyond that, you can add whatever information your facility needs. Keep the text readable at a distance. Use clear, simple language. Avoid abbreviations that only insiders would know.
Custom vs. Standard: Which Should You Choose?
Use standard pipe markers when:
- The pipe content matches an available standard label exactly
- You want same-day availability for a standard job
- You're ordering large quantities of common markers
Use custom pipe markers when:
- The exact text you need isn't available in standard form
- You need a user-defined color
- You need bilingual text
- You need additional hazard or process information
- Your pipe size doesn't match standard label dimensions
- You're maintaining consistency with an existing custom system
On most commercial jobs, the majority of pipe markers are standard. Custom markers are typically needed for 10–20% of the pipe systems on a typical mechanical project — things like specialty process lines, non-standard fluid names, or facility-specific color categories.
How to Order Custom Pipe Markers
Here's what you need to know before placing a custom order:
Step 1: Know Your Pipe OD
Custom markers are sized the same way standard markers are — by the outside diameter of the pipe. Use the ASME A13.1 size chart to determine which label dimension you need:
- ¾" to 2" OD → 8" × 1⅛"
- 2½" to 7⅞" OD → 14" × 2¼"
- 8" to 10" OD → 24" × 4"
- 10"+ OD → 32" × 4"
If your application needs a truly non-standard size, let us know the OD and we'll recommend the right dimensions.
Step 2: Choose Your Color Combination
Pick the ASME A13.1 color that matches the contents:
- Green/White — safe fluids
- Yellow/Black — hazardous materials
- Red/White — fire suppression
- Orange/Black — toxic / extra hazardous
- Blue/White — low-hazard compressed gases
- Brown/White — combustible fuels
- Purple/White — reclaimed/non-potable water
If your application calls for a user-defined color, specify the background and text colors when ordering.
Step 3: Write the Label Text
Think through exactly what you want the label to say. Common formats:
- Simple content name: "Steam Condensate Return"
- Content with direction: "Chilled Water Supply →"
- Content with specification: "Hot Water Supply — 160°F"
- Bilingual: "Natural Gas / Gas Natural"
Keep it concise. The label has a fixed width — too many words and the text gets too small to read easily.
Step 4: Decide on Arrow Treatment
Decide whether you want:
- Integrated arrows on the text label (arrow built into the ends of the label)
- Separate standalone arrow labels ordered alongside the text markers
- Both (text label with integrated arrow and additional standalone arrows)
Most contractors use standalone arrow labels for flexibility — they can be added after the fact if needed, or oriented differently on complex pipe runs.
Step 5: Quantity
Order enough to cover all the required placement points plus 10–15% extra for mistakes, future additions, and maintenance replacements.
Custom labels typically have a minimum order quantity. Ask about minimums when you request your quote.
Get Custom Pipe Markers from Print Pro AZ
At Print Pro AZ, we make custom pipe markers to order. Tell us:
- The text you need
- The color combination
- The label size (or your pipe OD and we'll recommend the size)
- The quantity
We'll get you a quote fast. Most custom orders ship within a few business days. Made in the USA.
👉 Order Custom Pipe Markers → 👉 Browse Standard Pipe Markers →
Frequently Asked Questions
What is a custom pipe marker? A custom pipe marker is a pipe label with text, colors, or sizes that go beyond standard catalog options. Custom markers can carry any pipe content name, user-defined colors, bilingual text, or additional hazard information.
When do I need a custom pipe marker instead of a standard one? You need a custom marker when the standard catalog doesn't carry the exact label text you need, when you're using user-defined colors under ASME A13.1, when you need bilingual text, or when you need non-standard label dimensions.
Can custom pipe markers still be ASME A13.1 compliant? Yes. ASME A13.1 allows custom labels as long as they use the correct color coding for the pipe contents (or a documented user-defined color), carry clear identification of the pipe contents, and include flow direction arrows.
What colors can I use on a custom pipe marker? You can use any of the 7 standard ASME A13.1 color combinations or user-defined colors. User-defined colors must be documented in your facility's pipe marking plan and communicated to workers in the building.
How long does it take to get custom pipe markers? At Print Pro AZ, most custom orders ship within a few business days. Contact us for lead times on specific quantities and requirements.
Can I get custom pipe markers with a specific chemical name on them? Yes. Custom text can include any pipe content description — specific chemical names, trade names, CAS numbers, or any other identifier that works for your facility.
Is there a minimum order quantity for custom markers? Custom orders typically have a minimum order quantity. Contact Print Pro AZ for current minimums and pricing on your specific requirements.
Can I get custom pipe markers in multiple languages? Yes. Bilingual pipe markers are a common custom order. Specify both language versions of the pipe content name when ordering.