Product Overview

The Pentair 474972 is a genuine OEM manifold assembly kit for Pentair MasterTemp 125 (125,000 BTU) pool and spa heaters. The manifold directs pool water through the heater, houses the bypass valve, seals against the heat exchanger and holds the water pressure switch. This kit replaces a cracked, leaking or worn manifold and its seals to restore proper water flow, bypass function and pressure-switch operation.

⚠️ Important Purchase Notice

Pool heaters involve water, gas, electrical and combustion safety systems. This kit should be installed by a qualified pool heater technician following Pentair's service instructions. Inspect the shipment upon arrival and report damage promptly.

Ideal For

• Replacing a cracked or leaking manifold on a MasterTemp 125 heater.
• Replacing worn manifold seals and O-rings.
• Bypass valve or water pressure switch service during a manifold repair.
• Natural gas or propane MasterTemp 125 heaters.
• Professional pool heater technicians.

Key Features

• Genuine Pentair OEM part, number 474972.
• Complete manifold service kit for the MasterTemp 125 platform.
• Includes the coil/tubesheet sealing O-ring kit and manifold O-ring.
• Includes the bypass valve and water pressure switch.
• Includes bottom plate, baffle plate and mounting hardware.

Benefits

• Stops leaks from a damaged manifold or failed manifold seals.
• Restores correct water flow, bypass and pressure-switch operation.
• Extends heater life when the rest of the unit is in good condition.
• All the main manifold service parts in one kit.

Compatibility

Fits Pentair MasterTemp 125 pool and spa heaters, including model references 461058, 461059, 461060 and 461061 (natural gas and propane) when verified by the heater label and parts diagram. Confirm the heater model, serial number, fuel type and existing manifold part number before ordering.

Installation or Upgrade Context

Turn off power, gas and circulation equipment, let the heater cool and relieve system pressure. Remove the old manifold, inspect the heat exchanger sealing surface, sensors, wiring and unions, then install the new manifold with the supplied seals, bypass valve and pressure switch. Test for leaks, confirm water flow and pressure-switch operation, and verify the heater starts and runs safely.

What’s Included

• 1 × manifold assembly
• 1 × coil/tubesheet sealing O-ring kit
• 1 × manifold bottom plate
• 1 × manifold O-ring
• 1 × manifold baffle plate
• 1 × manifold bypass valve
• 1 × water pressure switch
• 5/16" stainless steel washer and 5/16" x 18 x 2-3/4" hex cap screw hardware

Heat exchanger, burner tray, gas valve, control board, plumbing fittings, unions and labor are not included.

Specifications

Warranty

Covered by Pentair’s manufacturer warranty, subject to Pentair’s applicable terms. Contact Pentair for warranty claim instructions; Pool Supply Depot can provide proof of purchase.

Customer Q&A

What heater does this fit?

Pentair MasterTemp 125 (125,000 BTU) pool and spa heaters, natural gas or propane, when the parts diagram calls for 474972.

Does it include the heat exchanger?

No. This is a manifold kit only; the heat exchanger is sold separately.

Can this fix a leaking heater?

Yes, if the leak comes from the manifold or its seals. Have a technician confirm the source of the leak first.

Should it be professionally installed?

Yes. Professional installation is strongly recommended.