Pentair MasterTemp Pool Heater Manifold Kit 250K 460748

Pentair SKU: 460748
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Pentair MasterTemp Pool Heater Manifold Kit 250K 460748

Pentair SKU: 460748
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Pentair 460748 MasterTemp 250 Pool Heater Manifold Kit

The Pentair 460748 Manifold Kit is a genuine replacement water system manifold assembly for compatible Pentair MasterTemp® 250 pool and spa heaters. This manifold is used on MasterTemp 250 natural gas and propane heater models and helps route pool water through the heater’s water system.

This replacement kit is commonly used when the original heater manifold is cracked, leaking, damaged, warped, or has internal components that are worn or no longer sealing correctly. A damaged manifold can cause water leaks, flow problems, pressure issues, heater cycling, overheating symptoms, or poor heater operation.

Product Features

  • Genuine Pentair replacement heater manifold kit
  • Manufacturer part number: 460748
  • Designed for Pentair MasterTemp® 250 pool and spa heaters
  • Compatible with 250NA and 250LP heater models where specified
  • Water system manifold replacement kit for 250,000 BTU MasterTemp heaters
  • Helps restore proper water flow through the heater
  • Common replacement for cracked, leaking, or damaged heater manifolds
  • Used during heater water system repair and manifold service

Product Details

Brand Pentair
Part Number 460748
Product Type Heater Manifold Kit / Water System Manifold Replacement Kit
Heater Series MasterTemp®
Heater Size 250,000 BTU
Compatible Models MasterTemp 250NA and 250LP
Application Pool and spa heater water system repair
Common Use Replacing a cracked, leaking, or damaged heater manifold

Compatibility

  • Pentair MasterTemp® 250NA natural gas heater models requiring part number 460748
  • Pentair MasterTemp® 250LP propane heater models requiring part number 460748
  • Compatible MasterTemp 250 heater water system applications where the original parts diagram lists 460748
  • Select Sta-Rite Max-E-Therm 250 heater applications may use equivalent water system components; verify by heater model and parts diagram before ordering

Common Signs This Part May Need Replacement

  • Water leaking from the heater manifold area
  • Visible cracks or damage on the manifold body
  • Heater shows water flow or pressure-related issues after other causes have been ruled out
  • Heater cycles, overheats, or shuts down due to poor internal water flow
  • Manifold was damaged by freeze expansion, overheating, chemical damage, or age
  • Internal bypass, thermal regulator, O-rings, fittings, or sealing areas are damaged or worn

Important Notes

  • This item is the manifold kit for compatible MasterTemp 250 heaters.
  • Verify your exact heater model, BTU size, fuel type, and parts diagram before ordering.
  • This part is not universal for all Pentair MasterTemp heaters.
  • MasterTemp 175, 200, 300, 400, HD, and ASME models may use different manifold or heat exchanger parts.
  • Heater water leaks can also be caused by damaged O-rings, tube sheet seals, connector tubes, drain plugs, pressure relief fittings, or heat exchanger damage.
  • Replacing the manifold may not correct heater issues caused by gas supply, ignition, control board, sensor, airflow, or heat exchanger problems.
  • Gas heater repairs should be performed by a qualified pool heater technician.

Installation Notes

  • Turn off electrical power to the heater before service.
  • Shut off the gas supply before working on or around gas heater components.
  • Allow the heater to cool completely before removing any water system parts.
  • Relieve system pressure and drain the heater before removing the manifold.
  • Inspect the heat exchanger, tube sheet O-rings, bypass valve, thermal regulator, pressure switch, drain plug, and connector tube parts during service.
  • Replace worn O-rings and seals whenever the manifold is removed.
  • Use only pool-safe silicone lubricant on applicable O-rings.
  • Do not use petroleum-based lubricants on rubber seals.
  • After installation, check carefully for leaks and verify proper heater operation before returning the system to normal use.

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Maintenance Tips

  • Maintain proper pool water chemistry to help protect heater components from corrosion and scale buildup.
  • Keep the pool filter clean so the heater receives proper water flow.
  • Do not operate the heater with low water flow, repeated high-limit trips, or known leaks.
  • Inspect the heater for leaks after freeze events, overheating, or plumbing repairs.
  • Address small heater leaks quickly to help prevent additional damage to electrical and gas components.
  • Have recurring heater lockouts, overheating, or ignition issues diagnosed by a qualified heater technician.
Questions about returns? View our return policy.

Hours Of Operation:

Monday - Friday: 7:00 am to 5:00 pm Phoenix Time

Saturday: 8:00 am to 2:00 pm

Sunday: Closed

  • We do not ship on Saturday or Sunday.
  • Orders totaling more than $300 will require signature confirmation upon delivery.
  • We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
  • Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
  • Expedited shipping options are available at checkout.

Return Policy:

  • Products that are received damaged will receive a refund in store credit.
  • Most products are eligible for return within 30 days of receipt, except where noted below.
  • To initiate a return, please complete an RMA form prior to sending your item back.
  • Original shipping costs are non-refundable and will be deducted from the return credit.
  • Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
  • Some returns will be charged an automatic 15% restocking fee.
  • We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
  • Please complete the return form to receive your RMA number and return shipping label.
  • Chemical products are not eligible for return under any circumstances.
  • The Pentair Colorsync 618031 is not eligible for return.
  • Pool cleaners are not eligible for return.
  • Opened seals and o-rings are not eligible for return.
  • Capacitors are not eligible for return.
  • Plastic popup tools are not eligible for return.
  • Automation components and circuit boards are not eligible for return.
  • If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
  • Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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