Hayward 400K Negative Pressure Indoor Vent Adapter | UHXNEGVT14008
Hayward Products
SKU: UHXNEGVT14008
Hayward UHXNEGVT14008 Negative Pressure Vertical Indoor Vent Adapter Kit, 8" (H400FD)
Hayward UHXNEGVT14008 is a genuine negative-pressure vertical indoor vent adapter kit designed for Hayward Universal H-Series H400FD (FDN/FDP) Low NOx heaters. It provides the proper 8" vent connection required for approved indoor (and certain covered outdoor) vertical venting installations when the site requires negative-pressure venting configuration.
Key Features
- Part Number: UHXNEGVT14008
- Brand: Hayward
- Type: Negative pressure vertical indoor vent adapter kit
- Vent Size: 8" diameter adapter
- Heater Compatibility: Hayward Universal H-Series H400FD models (commonly listed for H400FDN and H400FDP)
- Use Case: Indoor vertical venting (and certain covered outdoor venting situations when allowed by installation instructions)
- Genuine Hayward replacement kit for correct fit and code-compliant installation (when installed per Hayward instructions)
- Common note: listed as replacing older kit UHXNEGVT14001 in many references
Applications
Used for approved venting configurations on compatible Hayward H400FD heaters where an 8" negative-pressure vertical vent adapter is required. Often used in commercial or in-ground installations that need a specific indoor venting setup.
Installation Notes
- Verify the exact heater model (H400FDN/H400FDP) and the required venting type before ordering.
- Venting must follow Hayward installation instructions and local code requirements.
- Professional installation is strongly recommended for gas heater venting components.
- Inspect the venting path, clearances, and termination requirements during installation.
Related Products
- Hayward UHXNEGVT14008
- Hayward H400FD Heater Parts
- Hayward Universal H Heater Vent Kits
- Hayward Heater Gaskets & Seals
- Hayward Heater Ignition Parts
Maintenance Tips
- Inspect vent connections and supports periodically for looseness, corrosion, or signs of leakage.
- Keep the heater area clear and maintain required clearances for safe combustion air and service access.
- If the heater shows vent/pressure fault codes, verify venting configuration and restrictions before replacing parts.
- Have venting inspected during annual heater service, especially on indoor installations.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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