What are the specs for this Piston Kit?

The correct replacement for Goodman model ANZ130601AA — B1789888 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 ANZ130601AA — B1789888.

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 Flow Check Piston Kit for ANZ130601AA — B1789888

Name: OEM Goodman Flow Check Piston Kit for ANZ130601AA — B1789888
Brand: Goodman
SKU: GOODMAN-B1789888
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-B1789888 Brand: Goodman

$5.95 $7.95

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Genuine Goodman B1789888 Flow Check Piston Kit

The Goodman B1789888 flow check piston kit contains the refrigerant metering device (flowrator) matched to the ANZ130601AA heat pump. The piston is a precisely bored orifice that regulates refrigerant flow into the coil, and the spring-loaded flow-check design allows full-flow in one direction for correct heat-pump reversing operation. Using the exact factory bore size is essential — even a few thousandths of an inch off changes superheat, subcooling, and capacity, so a genuine OEM piston keeps your system running at rated efficiency.

Specifications

OEM Part Number: B1789888
Compatible Model: ANZ130601AA (Goodman Heat Pump)
Component Type: Flow check piston / flowrator metering device kit
Function: Meters refrigerant into the coil
Fit: Direct OEM replacement — factory-drilled orifice size

OEM vs. Generic

Generic piston assortments force you to guess the bore, and an incorrect orifice causes flooding, starving, or poor capacity. The genuine Goodman B1789888 arrives pre-sized for the ANZ130601AA, eliminating trial-and-error and protecting the compressor from off-design refrigerant conditions.

Installation Difficulty

Rating: Professional (4/5). The piston sits inside the refrigerant circuit, so replacement requires recovering the charge, opening the metering fitting, seating the new piston in the correct orientation, then evacuating and recharging. EPA 608 certification is required — leave this to a licensed technician.

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 Flow Check Piston Ki...

$5.95

Frequently Asked Questions

Does this Piston Kit fit my Goodman ANZ130601AA — B1789888?

Yes. This is the factory-specified OEM piston kit for the Goodman ANZ130601AA — B1789888. 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 ANZ130601AA — B1789888?

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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