SKU: 62531477481

JXI POOL HEATER 400K BTU NATURAL GAS - JXI400NK

Sale price$1655.09 Regular price$1838.99
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 13 - Aug 18

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Description

JXI POOL HEATER 400K BTU NATURAL GAS - JXI400NKThe Jandy JXI400NK 400,000 BTU Natural Gas Pool Heater with VersaFlo Integrated Bypass delivers the professional grade performance pool contractors need for commercial and residential installations. This high efficiency heater combines advanced combustion technology with reliable operation, making it the preferred choice for pool construction and service companies nationwide. Commercial Installation Benefits Engineered for contractor efficiency, the

The Jandy JXI400NK 400,000 BTU Natural Gas Pool Heater with VersaFlo Integrated Bypass delivers the professional-grade performance pool contractors need for commercial and residential installations. This high-efficiency heater combines advanced combustion technology with reliable operation, making it the preferred choice for pool construction and service companies nationwide.

Commercial Installation Benefits

Engineered for contractor efficiency, the JXI400NK features the VersaFlo Integrated Bypass system that simplifies installation and reduces labor costs. The digital display provides precise temperature control, while the low-NOx technology meets strict environmental regulations for commercial projects. With 84% thermal efficiency and 30-100 GPM flow rate capability, this heater handles demanding applications while minimizing operating costs for your clients.

Why Pool Contractors Choose MT Pools

MT Pools understands the demands of professional pool installation and service. Our superior customer service includes technical support from experienced professionals who know the challenges contractors face. With reliable inventory and wholesale pricing that protects your margins, we're your trusted B2B partner for high-value equipment orders.

Frequently Asked Questions

What's the difference between JXI400NK and the newer JXiQ400NK model?

The JXI400NK has been upgraded to the JXiQ400NK with enhanced features, but both offer the same 400K BTU capacity and VersaFlo bypass system that contractors rely on.

Does this heater meet commercial emission standards?

Yes, the JXI400NK features low-NOx technology that meets strict environmental regulations for commercial pool installations nationwide.

What warranty coverage does MT Pools provide?

The JXI400NK includes 1-year limited factory warranty plus 5-year heat exchanger warranty when equipped with VersaFlo bypass, backed by MT Pools' superior customer service.

Is professional installation required for this heater?

Yes, professional installation by qualified contractors is required following NEC/CEC codes with proper bonding and GFCI protection for warranty coverage.

Order Today

Join thousands of pool contractors who trust MT Pools for their commercial heating equipment needs. Our team provides expert technical guidance and fast shipping to keep your projects on schedule and profitable.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 62531477481

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4.7 ★★★★★
Based on 12 reviews
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Shanna
Alexandria, US
★★★★★ 5
Functional + Sexy
Size: Small, Color: Multicoloured E-(5-pack), Size: Small, Color: Multicoloured E-(5-pack)
Not only do these feel good, my husband can’t keep his hands off me. They fit so good and are soft. I change into these to sleep but also just use them as shorts to wear around the house. They’re comfortable and don’t slide around. I got a size small and I’m 100lbs.
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Reviewed in the United States on April 13, 2026
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ClairY
Port Orchard, US
★★★★★ 5
Finally!
Size: X-Large, Color: All Black D (5-pack)
Finally, comfortable underwear that don’t end up giving me a wedgie. I have a round booty and most cuts of underwear end up shifting as I walk and sit. The hem of the underwear comes right under my cheeks and the lightweight material ensures there’s no panty line and no shifting to where I don’t want them! I’m definitely purchasing more.
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Reviewed in the United States on May 17, 2026
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Verified Purchase
Amazon Customer
Lexington, US
★★★★★ 3
Ehh
Size: Medium, Color: Multicoloured E-(5-pack)
Very thin, still comfy but very thin material. Super soft though. I've worn and washed and they have held up but I won't be repurchasing bc these are so thin
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Reviewed in the United States on April 14, 2026
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Grma4m&m
Charlottesville, US
★★★★★ 5
They’re fantastic!!!!
Size: X-Large, Color: Multicoloured E-(5-pack)
My clothing size is 16/18 and XL. Even though Amazon suggested a size XXL, I ordered my normal XL and they fit perfectly. The fabric for this style is 92% bamboo viscose and is amazingly soft and almost silky feeling. I had ordered a different boy short in this brand but they were 80% bamboo viscose and the fabric was significantly heavier. I returned those and ordered these.
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Reviewed in the United States on April 25, 2026
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Liz Newman
New York, US
★★★★★ 5
Comfortable and cool. Does not ride up.
Color: 01-multicolour (4-pack), Size: Medium
Extremely comfortable. Stays cool. Ample coverage. Quality material. They do not creep up. I ordered a medium which I generally take a size small. I have reordered and will reorder again to add more colors to my collection.
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Reviewed in the United States on May 18, 2026

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