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Hayward H-Series FD Pool Heater Header Assembly | FDXLFOR1930

Hayward Products SKU: FDXLFOR1930
Hayward H-Series 135K BTU Heater Not sure it fits? See this part on the interactive diagrams Hayward H-Series 135K BTU HeaterHayward Universal H-Series Low NOx Heater

Hayward H-Series FD Pool Heater Header Assembly | FDXLFOR1930

Hayward Products SKU: FDXLFOR1930
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Hayward FDXLFOR1930 O-Ring Kit for H-Series Low NOx Pool & Spa Heaters

Part # FDXLFOR1930 — a replacement O-ring kit designed for the front header on Hayward Universal H-Series Low NOx heaters. This kit restores the seal between the header and heat exchanger, helping prevent leaks and maintain proper pressure in the system.

Key Features

  • Genuine Hayward O-ring kit engineered for the front header area of H-Series low NOx heaters.
  • Contains all necessary O-rings and sealing components to restore the header seal.
  • Designed to resist pool/spa heater corrosion, high temperature cycling, and standard chemical exposure.
  • Direct replacement for the heater’s front header seal — no modification required.

Typical Applications

This O-ring kit is appropriate when the front header of a compatible Hayward heater begins leaking at the header connection, or when servicing the heater and re-sealing is required. Used in low NOx heater models where the header must be removed or replaced, or the seal shows signs of wear or degradation.

Installation & Compatibility Notes

Before installation, shut off the heater and allow it to cool completely. Turn off any water flow and relieve system pressure. Remove the header assembly, clean the sealing surfaces thoroughly, install the new O-rings from the FDXLFOR1930 kit per the service instructions, reassemble the header and retighten to the manufacturer’s specified torque. Restart the heater and verify there are no leaks at the header connection.

Why Choose This Kit?

Selecting the Hayward FDXLFOR1930 kit ensures you are using manufacturer-approved sealing components designed for the H-Series heaters. It helps maintain system integrity, prevents future leaks, and supports proper heater performance and longevity.

Maintenance Tips

  • Inspect the header connection annually for signs of seepage or corrosion around the header seal area.
  • If the heater has been subject to freezing, high chemical load or frequent thermal cycling, consider replacing the O-rings proactively when servicing the header.
  • Use only clean, lint-free cloths to clean the sealing face and always install fresh O-rings from the kit — reuse of old O-rings may lead to leaks.
  • Ensure water chemistry is properly maintained to reduce corrosion and thermal stress on heater components and seals.
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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