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OEM Payne Piston Tool Kit for PH13NB02500GAAAA — 321454-751
Payne

OEM Payne Piston Tool Kit for PH13NB02500GAAAA — 321454-751

SKU: 321454-751 Brand: Payne
$49.99
✓ Guaranteed to fit 321454-751 — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

Genuine Payne OEM part 321454-751 — piston tool kit for the Payne PH13NB02500GAAAA (payne split system heat pump 13 seer, PAYNE SPLIT SYSTEM HEAT PUMP 13 SEER, 208/230-1-60). This part meters gas or refrigerant flow at a precisely calibrated rate. Factory replacement verified against Carrier Corporation's own parts data for this model (Payne is a Carrier brand). Located in: Coil And Piping.

✓ Guaranteed to fit the PH13NB02500GAAAA — or the return shipping is on us. Same-day shipping on orders before 3PM CST, from Houston, TX.

⚡ Installation: 🟠 Pro Recommended  ·  30–60 min  ·  Wrench set
Size is calibrated to the unit and gas type (natural vs LP) — never drill or substitute. Guidance only — when unsure, hire a licensed HVAC technician.

Will this fit my PH13NB02500GAAAA?

Yes — this part is verified against the manufacturer's parts list for the PH13NB02500GAAAA. Have a different model? Search your model number in our store; this part serves other Carrier-family units as well.

Is this an OEM part?

Genuine Carrier Corporation (Payne is a Carrier brand) OEM — the same part your unit was built with, not an aftermarket substitute.

What if it doesn't fit?

We send a prepaid return label and issue a full refund — 30 days, uninstalled parts. Installed or energized parts are non-returnable; manufacturing defects are handled under the manufacturer's warranty.

When will it ship?

Order before 3PM CST and it ships the same business day from Houston, TX.

Can I install it myself?

This part is rated Pro Recommended (30–60 min typical). A licensed technician is strongly recommended.

Natural gas vs LP — does the orifice differ?

Yes, critically — LP runs smaller orifices at higher pressure. Wrong orifice means sooting or overheating. Never drill one out.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $99
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Orifice fit my Payne PH13NB02500GAAAA — 321454-751?
Yes. This is the factory-specified OEM orifice for the Payne PH13NB02500GAAAA — 321454-751. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the orifice on my Payne PH13NB02500GAAAA — 321454-751?
Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.
What symptoms mean I need a new orifice?
Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.
Is this orifice compatible with Bryant or Payne too?
Many Payne parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Payne orifice?
OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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Mike Rivera
HVAC Parts Specialist — Online