What are the specs for this Piston Kit?

The correct replacement for Goodman model ASH130481AA — B1789884 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 ASH130481AA — B1789884.

What symptoms indicate I need a new piston kit?

Common symptoms that indicate you need a new piston kit 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 kit 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 / Flowrator Kit for ASH130481AA — B1789884

Name: OEM Goodman Piston / Flowrator Kit for ASH130481AA — B1789884
Brand: Goodman
SKU: GOODMAN-16068
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-16068 Brand: Goodman

$5.95 $7.95

OEM Guaranteed

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30-Day Returns

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Texas CMBL #19328542014

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Govt POs Accepted

The Goodman B1789884 Piston Kit is a genuine OEM flowrator (fixed-orifice metering device) for the ASH130481AA heat pump. The piston meters refrigerant into the indoor or outdoor coil, setting the correct pressure drop and superheat for efficient operation. Using the factory-specified piston is essential — an incorrectly sized orifice causes poor capacity, high head pressure, or compressor flooding.

Specifications

OEM Part Number: B1789884
Brand: Goodman
Category: Piston / Flowrator Metering Device
Compatible Equipment: ASH130481AA Heat Pump
Factory-drilled orifice sized to unit tonnage and charge
Drops into the existing distributor body — no re-piping

OEM vs. Generic

Generic piston assortments require you to guess the bore diameter; an over- or under-sized orifice throws off superheat and can damage the compressor over time. This genuine OEM B1789884 arrives with the exact orifice Goodman engineered for the ASH130481AA, guaranteeing correct metering out of the box.

Install Difficulty

Intermediate (3/5). The piston seats inside the refrigerant distributor, so it requires recovery of the charge, opening the metering body, swapping the piston, then evacuation and recharge. Best performed by a certified technician during a coil or valve service.

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 / Flowrator K...

$5.95

Frequently Asked Questions

Does this Piston Kit fit my Goodman ASH130481AA — B1789884?

Yes. This is the factory-specified OEM piston kit for the Goodman ASH130481AA — B1789884. 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 kit on my Goodman ASH130481AA — B1789884?

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 kit?

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

Is this piston kit 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 kit?

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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