What are the specs for this Tubing?

The correct replacement for Goodman model WAHMS3743P4ABA — 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 WAHMS3743P4ABA — 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 WAHMS3743P4ABA — B1796630

Name: OEM Goodman Flowrator Inlet Tube for WAHMS3743P4ABA — B1796630
Brand: Goodman
SKU: B1796630-GEN
Price: 5.95 USD
Availability: InStock

SKU: B1796630-GEN Brand: Goodman

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The Goodman B1796630 Flowrator Inlet Tube is a genuine OEM refrigerant-metering component for the WAHMS3743P4ABA air handler. The flowrator (piston-style metering device) seats inside this inlet tube to control the flow of liquid refrigerant into the evaporator coil, maintaining correct superheat and cooling capacity. A damaged, kinked, or mismatched tube can cause poor cooling, frost on the coil, or refrigerant flooding, so an exact-fit OEM tube is essential for proper system charge and performance.

Specifications

Part Number: B1796630
Type: Flowrator / metering inlet tube
Fits Model: WAHMS3743P4ABA air handler
Function: Houses piston metering device feeding the evaporator coil
Material: Copper tubing assembly
Brand: Goodman (OEM)

OEM vs. Generic

This genuine Goodman inlet tube matches the exact bore, length, and fitting size required by the WAHMS3743P4ABA coil circuit. Generic substitutes may have incorrect inner diameters or fittings that alter refrigerant metering and degrade efficiency. OEM ensures the system charges and meters as the manufacturer intended.

Installation Difficulty

Advanced. Requires recovering refrigerant, brazing or fitting connections, and re-evacuating and recharging the system. This is an EPA Section 608 certified task — professional HVAC installation is strongly recommended.

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 WAHMS3743P4ABA — B1796630?

Yes. This is the factory-specified OEM tubing for the Goodman WAHMS3743P4ABA — 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 WAHMS3743P4ABA — 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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