Raypak 003898F Millivolt Natural Gas Combination Gas Valve Kit (Standing Pilot) – OEM Replacement
The Raypak 003898F is an OEM replacement millivolt (standing pilot) natural gas combination gas valve kit used on many Raypak millivolt pool and spa heaters. This valve controls gas flow to the pilot and main burner and is a common fix when the heater won’t open the gas valve, has inconsistent firing, or the valve is sticking, leaking, or corroded.
Key Features
- Part Number: 003898F
- Gas Type: Natural Gas (NG)
- Ignition Type: Millivolt / Standing Pilot (not for IID electronic ignition systems)
- OEM Valve Reference: Commonly identified as a Robertshaw 7000-series millivolt valve (verify markings on your existing valve)
- Function: Regulates pilot and main burner gas flow for safe heater operation
Common Applications
- Raypak millivolt pool/spa heaters that use a standing pilot system (commonly found on many Raypak MV model families)
- Replacing a failing or leaking gas valve on a natural gas millivolt heater
Symptoms a Gas Valve Replacement May Address
- Pilot stays lit but the main burners won’t ignite (after confirming proper water flow and safety circuit continuity)
- Intermittent ignition or burner drop-out on a millivolt system
- Valve is sticking, corroded, or will not open reliably
- Gas smell or suspected leakage at the valve (shut down immediately and service before operating)
Important Fit & Safety Notes
- Natural gas only: Do not use on propane/LP systems. Use the correct LP/millivolt valve for propane heaters.
- Millivolt only: Not intended for IID/digital electronic ignition heaters that use an electronic gas valve.
- Verify before ordering: Match the part number to your heater model/serial and compare the existing valve and connections.
- Qualified service recommended: Gas components are safety-critical and should be installed and leak-tested by a trained professional.
Related Products
- Raypak Millivolt Gas Valves
- Raypak 003899F (Millivolt Propane Gas Valve)
- Raypak 003900F (Natural Gas IID Gas Valve)
- Raypak Millivolt Pilot Assemblies
- Thermopile / Millivolt Generator
- Raypak Gas Shutoff / Gas Cocks
- Gas Leak Detector Solution
Installation & Maintenance Tips
- Shut off gas supply and power (if present), and let the heater cool before servicing any gas components.
- After installation, leak-test every gas joint and fitting before operating the heater.
- If the new valve won’t open, confirm pilot flame quality and thermopile output, clean pilot assembly, and verify the safety circuit is intact.
- Keep the burner compartment clean and ensure combustion air openings are clear to reduce corrosion and combustion issues.
