What are the specs for this Piston?

The correct replacement for Goodman model ANZ130241AB — B1789857 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Goodman equipment which lists the model number ANZ130241AB — B1789857.

What symptoms indicate I need a new piston?

Common symptoms that indicate you need a new piston include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this piston compatible with Bryant or Payne systems too?

Many Goodman parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

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Goodman

OEM Goodman Piston / Restrictor Kit for ANZ130241AB — B1789857

Name: OEM Goodman Piston / Restrictor Kit for ANZ130241AB — B1789857
Brand: Goodman
SKU: GOODMAN-15147
Price: 9.95 USD
Availability: InStock

SKU: GOODMAN-15147 Brand: Goodman

$9.95 $12.95

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Texas CMBL #19328542014

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The Goodman B1789857 is a genuine OEM piston (flowrator/restrictor) kit for the ANZ130241AB heat pump. The piston is the fixed-orifice metering device that regulates refrigerant flow into the coil. A correctly sized piston is essential for proper superheat, subcooling, and rated efficiency — the wrong orifice starves or floods the coil and kills performance.

Specifications

Type: Fixed-orifice piston / flowrator kit
Application: Refrigerant metering device
Fits equipment: Goodman ANZ130241AB heat pump
Includes: Piston with factory-specified orifice bore
Type: OEM replacement

OEM vs. Generic

The OEM Goodman piston is bored to the exact orifice diameter Goodman engineered for this coil and tonnage. Generic or universal pistons may be off by a few thousandths of an inch, which is enough to cause improper metering, high head pressure, or poor capacity. For a metering device, precise OEM sizing matters — always match the factory part.

Installation Difficulty

Professional / Advanced — Requires opening the sealed refrigerant circuit: recover refrigerant, disassemble the liquid-line/distributor fitting, swap the piston, reassemble with a new seal, evacuate, and recharge to nameplate. EPA 608 certification required. Recommended for a licensed HVAC technician, not DIY.

Verify your model and serial number before ordering. Contact info@nationalhvacparts.com with questions.

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 $75
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

OEM Goodman Piston / Restrictor ...

$9.95

Frequently Asked Questions

Does this Piston fit my Goodman ANZ130241AB — B1789857?

Yes. This is the factory-specified OEM piston for the Goodman ANZ130241AB — B1789857. 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 piston on my Goodman ANZ130241AB — B1789857?

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 piston?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this piston compatible with Bryant or Payne too?

Many Goodman 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 Goodman piston?

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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