
Jandy Rear Header for LXi Low NOx Heater, R0454200
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Quick overview
- Genuine Jandy Factory part number R0454200 for the LXi heater.
- Hardware and gaskets included The header comes with the fasteners and gaskets for the job, not as a bare casting.
- LXi Low NOx Listed for the Jandy LXi Low NOx pool heater.
- Rear header This is the rear header. The front header is a separate part, so confirm which end is leaking.
- For a cracked or corroded header Water under the back of the heater, or a header face that has corroded through, is what this part answers.
- Fit the new gaskets Use the gaskets supplied. Old gaskets that have been crushed once will not seal a second time.
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Frequently bought together

Rear Header for LXi Low NOx Heater, R0454200
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Product details
The Jandy R0454200 is the rear header for the LXi Low NOx pool heater, supplied with the hardware and gaskets needed to fit it. It is the genuine part.
What the header does
The headers close off each end of the heat exchanger and route pool water through it. They see every gallon that passes through the heater, at temperature, which is why they are the part that corrodes and cracks rather than the tubes themselves. Low pH water, high salt levels and a poorly bonded system all shorten their life.
Front or rear
This is the rear header. The front header is a separate part, so trace the leak before ordering rather than guessing from where the water reaches the pad. Water travels along the base of a heater and can appear a long way from the actual crack.
Fitting
Use the gaskets that come with it. A gasket that has been compressed once has taken its set and will not seal again, and a header joint that weeps after reassembly means the whole job comes apart a second time.
| Brand | Jandy |
|---|---|
| Manufacturer part number | R0454200 |
| UPC | 052337023030 |
| Type | Rear header |
| Included | Hardware and gaskets |
| Fits | Jandy LXi Low NOx heater |
| Part type | Pool heater part |
| Shipping weight | 3 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?
Does it come with gaskets?
Is this the front or the rear header?
Why do headers fail?
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