What are the specs for this Piston Kit?

The correct replacement for Goodman model GSC130481AG — B1789882 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 GSC130481AG — B1789882.

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 Kit for GSC130481AG — B1789882

Name: OEM Goodman Piston Kit for GSC130481AG — B1789882
Brand: Goodman
SKU: GOODMAN-739
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-739 Brand: Goodman

$10.95 $14.78

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Texas CMBL #19328542014

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The Goodman B1789882 is a genuine OEM piston (flowrator) kit for the GSC130481AG condensing unit. The piston is the fixed-orifice metering device that controls refrigerant flow into the evaporator coil. Using the correctly sized piston is critical: an undersized or oversized orifice causes poor subcooling/superheat, reduced capacity, and potential compressor damage. This kit delivers the factory-specified bore for proper system charge and performance.

Specifications

Part Number: B1789882
Type: Fixed-orifice piston / flowrator kit
Function: Refrigerant metering at the coil
Application: Matched to GSC130481AG capacity
Fits Model: GSC130481AG
Brand: Goodman (OEM)

OEM vs. Generic

This genuine OEM piston is bored to Goodman's exact specification for this unit. Generic pistons may be mislabeled or sized for a different tonnage, leading to incorrect metering and service callbacks. For a metering device, matching the factory orifice is non-negotiable — choose OEM.

Installation Difficulty

Advanced. Replacing a piston requires recovering the refrigerant charge, opening the liquid-line connection at the coil, swapping the piston, then evacuating and recharging the system. This must be performed by an EPA-certified technician with proper recovery and vacuum equipment.

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 Kit for GSC13...

$10.95

Frequently Asked Questions

Does this Piston Kit fit my Goodman GSC130481AG — B1789882?

Yes. This is the factory-specified OEM piston kit for the Goodman GSC130481AG — B1789882. 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 GSC130481AG — B1789882?

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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