What are the specs for this Coupling?

The correct replacement for Goodman model GUN100-4 Furnace — B1810400 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 GUN100-4 Furnace — B1810400.

What symptoms indicate I need a new coupling?

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

Is this coupling 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 Rubber Coupling Drain Hose for GUN100-4 Furnace — B1810400

Name: OEM Goodman Rubber Coupling Drain Hose for GUN100-4 Furnace — B1810400
Brand: Goodman
SKU: GOODMAN-13151
Price: 6.95 USD
Availability: InStock

SKU: GOODMAN-13151 Brand: Goodman

$6.95 $9.49

OEM Guaranteed

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Texas CMBL #19328542014

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The Goodman B1810400 Rubber Coupling is a genuine OEM connector used to join drain, condensate, or inducer/vent hose sections on the GUN100-4 gas furnace and related GUN100 series units. Over time, rubber couplings harden, crack, and split — leading to condensate leaks, pressure-switch faults, and nuisance lockouts. Replacing a worn coupling with the correct OEM part restores a sealed, leak-free connection.

Specifications

OEM Part Number: B1810400
Material: Heat- and moisture-resistant rubber
Type: Hose/tube coupling connector
Fits: Goodman GUN100-4 and GUN100 series furnaces
Function: Sealed connection for drain/condensate/vent tubing

OEM vs. Generic

The Goodman OEM coupling is molded to the exact inner diameter and durometer required for a proper interference-fit seal on your furnace's tubing. Generic rubber couplings from a hardware store may be the wrong bore size or a softer compound that degrades faster in the furnace's warm, humid environment — a common cause of repeat leaks.

Installation Difficulty

Very Easy (1/5). A quick, tool-light swap: slide off the old coupling, clean the tube ends, and press the new one into place (clamps if originally equipped). No electrical work required.

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 Rubber Coupling Drai...

$6.95

Frequently Asked Questions

Does this Coupling fit my Goodman GUN100-4 Furnace — B1810400?

Yes. This is the factory-specified OEM coupling for the Goodman GUN100-4 Furnace — B1810400. 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 coupling on my Goodman GUN100-4 Furnace — B1810400?

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 coupling?

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

Is this coupling 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 coupling?

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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