Pentair | 474065 | Tube Sheet Coil Assembly Kit, Cupro-Nickel HD, for MasterTemp 400 and Max-E-Therm 400 Heaters
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Genuine Pentair 474065 heavy duty cupro-nickel tube sheet coil assembly kit. This is the complete replacement heat exchanger for Pentair MasterTemp 400 HD and Sta-Rite Max-E-Therm 400 HD pool and spa heaters, and it also upgrades standard MasterTemp 400 and Max-E-Therm 400 natural gas or propane heaters built after January 12, 2009 to the corrosion resistant HD heat exchanger.
Key Features
- Cupro-nickel construction resists corrosion from salt chlorine systems, poor water chemistry, and aggressive water far better than a standard copper exchanger
- Direct fit for 400,000 BTU MasterTemp and Max-E-Therm heaters, natural gas and propane
- Restores full heat transfer and flow after scaling, leaks, or copper erosion
- Complete kit: coil and tube sheet assembly, sealing O-ring kit, insulation kit (77707-0008), igniter (77707-0054), and blower adapter plate and gasket kit (77707-0011)
- Genuine Pentair part backed by the Pentair manufacturer warranty
Compatibility
- Pentair MasterTemp 400HD NA and 400HD LP
- Sta-Rite Max-E-Therm 400HD NA and 400HD LP
- Standard Pentair MasterTemp 400 NA / LP and Sta-Rite Max-E-Therm 400 NA / LP manufactured after 1/12/2009 (new tub design)
- Not for 200 or 250 BTU models. Use 474059 (250) or 473710 (250 HD) for those heaters
Specifications
| Brand | Pentair |
| Part Number | 474065 |
| Alternate Part Number | PUR-151-5065 |
| UPC | 788379792039 |
| Product Type | Tube Sheet Coil / Heat Exchanger Assembly Kit |
| Material | Cupro-Nickel (HD Series) |
| Heater Size | 400,000 BTU |
| Fuel Type | Natural Gas and Propane |
| Kit Includes | Coil / tube sheet assembly, O-ring kit, insulation kit, igniter, blower adapter plate and gasket kit |
| Box Dimensions | 18.5 in L x 18.5 in W x 10.5 in H |
| Shipping Weight | Approx. 40 lb |
Frequently Asked Questions
Will this fit my standard MasterTemp 400, or only the HD model?
Both. It is the factory part for the 400 HD, and it is an approved upgrade for any standard MasterTemp 400 or Max-E-Therm 400 built after January 12, 2009. Check the manufacture date on the heater rating plate.
What is the difference between 474061 and 474065?
474061 is the standard copper heat exchanger. 474065 is the heavy duty cupro-nickel version, which holds up much better with salt systems and unbalanced water chemistry.
Do I need to buy the igniter and gaskets separately?
No. The igniter, sealing O-rings, insulation kit, and blower adapter plate with gasket are all included in the box.
How do I know my heat exchanger needs replacing?
Common signs are water leaking from the heater, low flow or heater cycling, sooting, or the heater failing to reach set temperature. Confirm the diagnosis before ordering since the part is not returnable once installed.
Is professional installation required?
Pentair requires installation by a qualified pool heater technician for warranty coverage.