What are the specs for this Tubing?

The correct replacement for Goodman model WAHMS3642P4ABA Air Handler — B1796630 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 WAHMS3642P4ABA Air Handler — B1796630.

What symptoms indicate I need a new tubing?

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

Is this tubing 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.

Goodman

OEM Goodman Flowrator Inlet Tube for WAHMS3642P4ABA Air Handler — B1796630

Name: OEM Goodman Flowrator Inlet Tube for WAHMS3642P4ABA Air Handler — B1796630
Brand: Goodman
SKU: B1796630-GEN
Price: 5.95 USD
Availability: InStock

SKU: B1796630-GEN Brand: Goodman

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Goodman B1796630 Flowrator Inlet Tube

The Goodman B1796630 is a genuine OEM flowrator inlet tube used in the refrigerant metering assembly of WAHMS3642P4ABA air handlers. The flowrator (piston-style metering device) controls refrigerant flow into the evaporator coil, and this inlet tube delivers liquid refrigerant to the metering piston at the correct port and angle. A correct tube is essential for proper superheat, coil temperature, and overall system efficiency.

Specifications

Function: Refrigerant inlet feed to flowrator metering device
Material: Copper refrigerant-grade tubing
Brazed connection compatible
Fits: Goodman WAHMS3642P4ABA air handlers
OEM part number: B1796630

OEM vs. Generic

Refrigerant-side components must match length, diameter, and fitting type precisely. The genuine Goodman B1796630 is sized to the factory coil circuit, preventing restriction or improper metering. Non-OEM tubes risk incorrect charge behavior and coil freezing.

Installation Difficulty

Advanced. Replacement requires recovering refrigerant, brazing, evacuating, and recharging the system — EPA 608 certification is required. This is a job for a licensed HVAC technician, not a DIY repair.

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 Flowrator Inlet Tube...

$5.95

Frequently Asked Questions

Does this Tubing fit my Goodman WAHMS3642P4ABA Air Handler — B1796630?

Yes. This is the factory-specified OEM tubing for the Goodman WAHMS3642P4ABA Air Handler — B1796630. 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 tubing on my Goodman WAHMS3642P4ABA Air Handler — B1796630?

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 tubing?

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

Is this tubing 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 tubing?

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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