Hayward HAXHXA1303 copper heat exchanger assembly for H-Series 300,000 BTU heatersHayward Heat Exchanger Assembly for H-Series 300,000 BTU Heaters, HAXHXA1303$1,79699
Hayward HAXHXA1303 copper heat exchanger assembly for H-Series 300,000 BTU heaters
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Hayward Heat Exchanger Assembly for H-Series 300,000 BTU Heaters, HAXHXA1303

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Quick overview

  • Sized to the 300 This is the 300,000 BTU assembly. The other outputs in the H-Series use their own exchangers, so match the BTU rating on the data plate.
  • Copper Listed as a copper heat exchanger assembly.
  • Genuine Hayward The factory part, HAXHXA1303.
  • Complete assembly Supplied as an assembly rather than as a loose tube bundle to build up.
  • H-Series and ED2 Cataloged under the Hayward H-Series and the H-Series ED2 electronic gas heater ranges, models 150 through 400.
  • The heart of the heater The exchanger is where combustion heat crosses into the water, so a leaking one takes the whole heater out of service.
Full description and specifications ↓

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Product details

The Hayward HAXHXA1303 is the copper heat exchanger assembly for the H-Series 300,000 BTU pool heater. It is the genuine Hayward part, supplied as a complete assembly.

What the exchanger does

Everything the burner produces has to cross into the water somewhere, and the heat exchanger is that crossing point. It is also the component that pool chemistry attacks hardest. Low pH, high chlorine and years of flow eventually pit and split the tubes, and once an exchanger leaks the heater is finished until it is replaced.

Match the size

H-Series heaters run from 150 to 400 and each output has its own exchanger. This one is the 300. Take the model and BTU rating off the data plate before ordering, because the assemblies are not interchangeable between sizes.

Plan the job

Replacing an exchanger means opening the heater, which brings the o-ring set and union hardware into play. Those are separate Hayward numbers and are worth having in hand so the heater goes back together in one session.

Specifications
Brand Hayward
Manufacturer part number HAXHXA1303
UPC 610377810548
Type Heat exchanger assembly
Material Copper
Model size 300
Fits Hayward H-Series 300,000 BTU heater
Part type Pool heater part
Shipping weight 42.77 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Which heater does this fit?
The Hayward H-Series 300,000 BTU heater. It is cataloged under the H-Series and the H-Series ED2 electronic gas heater parts, models 150 through 400, in the 300 size.
Is it copper?
Yes. It is listed as a copper heat exchanger assembly.
Will a 400 assembly fit my 300?
No. Heat exchangers are sized to the BTU rating of the heater. Read the model and output from the data plate and order the matching assembly.
What else should I replace at the same time?
An exchanger swap means opening the heater, so the o-ring set and the union hardware for the H-Series are worth having on hand. Those are separate Hayward part numbers.
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