Pentair MasterTemp 460776 400,000 BTU propane low NOx ASME pool heaterPentair MasterTemp Heater 400,000 BTU LP Low NOx ASME, 460776 In stock$4,98499
Pentair MasterTemp 460776 400,000 BTU propane low NOx ASME pool heater
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Pentair MasterTemp Heater 400,000 BTU LP Low NOx ASME, 460776

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$4,98499
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Quick overview

  • 400,000 BTU on propane The large MasterTemp output, set up for propane gas.
  • ASME model Built to the ASME specification for the installations that require it.
  • Low NOx Meets low NOx emissions requirements.
  • Electronic ignition No standing pilot, with digital temperature control at the panel.
  • Indicator lights Front panel lights make it easy to see what the heater is doing.
  • No tubes or unions ASME models ship without tubes and unions, and those parts are no longer available, so order only if you already have the hookups.
Full description and specifications ↓

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Product details

The Pentair MasterTemp 460776 is the 400,000 BTU propane pool heater in the low NOx ASME configuration. It runs on electronic ignition with digital temperature control, and a copper heat exchanger is listed for this model.

Living with it

MasterTemp is built to be operated like the heating system in a house rather than a piece of pool equipment. Indicator lights on the front tell you what it is doing at a glance, the cabinet is compact for its output, and it runs quietly enough not to take over the pool deck.

Read this before ordering the ASME model

Pentair ASME heaters do not ship with tubes and unions, and those parts are no longer available to purchase separately. Only order this model if you are certain the hookups from your previous Pentair ASME heater are still in place and usable. It is the single most common problem with an ASME replacement.

Delivery

A heater of this size ships by freight and needs a delivery appointment, so plan the install date around the shipment rather than the other way round.

Specifications
Brand Pentair
Manufacturer part number 460776
Series MasterTemp
UPC 788379747565
Type ASME pool and spa heater
Fuel Propane
Heat input 400,000 BTU/hr
Heat exchanger Copper
Headers Bronze, ASME
Certification ASME
Ignition Hot surface (HSI), no standing pilot
Electrical 120 or 240 VAC, single phase, 60 Hz; ships with the 240 V plug
Amp draw About 5 A at 120 V, 2.5 A at 240 V; 15 A circuit
Gas connection 3/4 in
Water connections 2 in
Cabinet 21 in long, 23 in wide, 29 in high
Controls Digital, rotating display
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 propane ASME MasterTemp 400, 460776?
It is the ASME certified version of the 400,000 BTU propane heater, built with bronze headers and a copper heat exchanger. Whether a pool needs an ASME heater is for the local code and the inspector to say.
Is 460776 natural gas or propane?
Propane. Pentair's natural gas ASME MasterTemp 400 is part number 460775.
Where is the manual for the propane ASME MasterTemp 400?
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.
What do the ERR codes on a propane ASME MasterTemp 400 mean?
Each one names the safety device that opened. ERR PS is the water pressure switch, which means no water is flowing through the heater. ERR HLS is the high limit switch, ERR AFS the air flow switch, ERR IGN a failed ignition and ERR SFS a stack flue temperature above 480 degrees F. What to check for each is in our pool heater error code guide.
Can the propane ASME MasterTemp 400 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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