Pentair MasterTemp 460771 250K natural gas ASME pool heaterPentair MasterTemp 250K Natural Gas Heater IID ASME, 460771 In stock$4,33099
Pentair MasterTemp 460771 250K natural gas ASME pool heater
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Pentair MasterTemp 250K Natural Gas Heater IID ASME, 460771

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$4,33099
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Quick overview

  • 250,000 BTU natural gas 250,000 BTU/hr input, by Pentair, fired on natural gas.
  • ASME model The ASME version of the MasterTemp, Pentair part 460771.
  • Electronic ignition An IID electronic ignition rather than a standing pilot.
  • Digital temperature control Set and read water temperature at a digital control panel.
  • Low NOx Built to Low NOx emission requirements for in ground residential pools.
  • No tubes or unions supplied Pentair ASME heaters do not include tubes and unions, and those are no longer sold, so order only if your existing hookups fit.
Full description and specifications ↓

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Product details

The Pentair MasterTemp 460771 is a natural gas pool heater in the 250K class, built to the ASME specification, with electronic ignition, digital temperature control and Low NOx emissions. Pentair rates it at 250,000 BTU/hr input.

Controls and ignition

Ignition is electronic, an IID system rather than a standing pilot, so there is no continuously burning flame waiting for a call for heat. Temperature is set and read at a digital control panel, and the specification lists a copper heat exchanger.

The ASME caveat, read this before ordering

Pentair ASME model heaters do not come with tubes and unions as standard equipment, and those parts are no longer available to purchase. That means this heater is only the right choice if you already have the hookups from a previous Pentair ASME heater and you are sure they will fit. If you are not sure, resolve that before the heater ships, because the pieces cannot be bought after the fact.

Shipping

A complete gas heater ships by freight, not parcel. Expect a curbside delivery and plan for how it will be moved to the equipment pad.

Specifications
Brand Pentair
Manufacturer part number 460771
Model MasterTemp 250K
UPC 788379788414
Type ASME pool and spa heater
Fuel Natural gas
Heat input 250,000 BTU/hr
Heat exchanger Copper
Ignition Hot surface (HSI), no standing pilot
Headers Bronze, ASME
Certification ASME
Electrical 120 or 240 VAC, single phase, 60 Hz
Amp draw About 5 A at 120 V, 2.5 A at 240 V; 15 A circuit
Water connections 2 in
Gas connection 3/4 in
Controls Digital
Emission Low NOx
Pool type In Ground, Residential
Included Tubes and unions not included
Shipping weight 142 lb
Ships Freight

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Questions and answers

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

What is different about the ASME MasterTemp 250, 460771?
It is the ASME certified version of the 250,000 BTU heater, built with bronze headers and a copper heat exchanger. Pentair makes a heavy duty ASME version with a cupronickel exchanger under another part number. Whether a pool needs an ASME heater is for the local code and the inspector to say.
Does the ASME MasterTemp 250, 460771, come with tubes and unions?
No. Pentair ASME model heaters are not supplied with tubes and unions as standard equipment, and those pieces are no longer available to buy. Order this heater only if you are confident the hookups from your previous Pentair ASME heater can be reused.
Is 460771 natural gas or propane?
Natural gas. Pentair's propane ASME MasterTemp 250 is part number 460772.
Where is the manual for the ASME MasterTemp 250?
Under Downloads on this page, as the Owners Manual. It is Pentair's MasterTemp Installation and User's Guide, part number 472592, which covers the 175,000 to 400,000 BTU models in natural gas and propane, the HD and ASME versions included.
Can the ASME MasterTemp 250 be installed indoors?
Pentair certifies the ASME MasterTemp for indoor installation with its Direct Air Intake Duct Kit. Outdoors it needs no kit.
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