The Raypak 002003F is a direct OEM-style replacement pilot assembly designed for a range of Raypak pool and spa gas heaters. It ships with both a natural gas and an LP orifice, making it compatible with either fuel type right out of the box. If your heater is failing to light, cycling off unexpectedly, or the pilot won't hold a flame, this assembly addresses the root of the problem at the ignition source.
The pilot assembly is a critical component in standing-pilot gas heater systems. When the pilot flame weakens, the thermocouple loses its signal to the gas valve, shutting down the heater. A degraded or failed pilot assembly is one of the most common causes of pool and spa heater no-heat calls. Replacing the full pilot assembly -- rather than just the orifice -- restores reliable ignition and proper thermocouple feedback.
Raypak part number 002003F is also catalogued under NBK Parts number 20438. If you have sourced this part through a wholesale or HVAC supply channel under the NBK number, it is the same assembly. Confirm your heater model before ordering using the fitment list below.
Ships with both a natural gas orifice and an LP (propane) orifice. Install the correct one for your fuel type during replacement.
Engineered to match the mounting and connection specifications of original Raypak pilot assemblies in the covered model series.
Fits eight Raypak pool and spa gas heater models across the 100-series and 400-series product families.
Weighs approximately 0.2 lbs., making handling and installation straightforward with standard hand tools.
If your model number is not listed above, do not assume compatibility. Raypak offers multiple pilot assemblies across its heater lineup and fitment is model-specific.
This assembly is listed in parts catalogs under NBK Parts number 20438. Both numbers refer to the identical Raypak 002003F pilot assembly.