Raypak 003898F Millivolt Natural Gas Combination Valve 3/4" NPT

The Raypak 003898F is a genuine OEM millivolt natural gas combination valve designed for Raypak pool and spa heaters. This factory replacement valve integrates a manual gas cock, safety shutoff, Pilotstat assembly, and millivoltage automatic valve operator in one compact unit.

Key Features:

• 3/4" x 3/4" NPT inlet and outlet connections for easy installation
• Millivolt operation requires 750mV Powerpile generator (thermopile) - sold separately
• Integrated safety shutoff system closes main and pilot gas flow if pilot flame fails
• Compatible with Honeywell VS820H2081 specifications
• Pressure regulator setting: 3.5" water column (0.87 kPa)
• Temperature rating: 32°F to 175°F (0°C to 79°C)
• Natural gas only - for propane applications, use Raypak 003899F

Compatible Heater Models:

• Raypak Spa Pak and Gemini: 53, 53A, 53B, 151, 153, 153A
• Raypak Versa: 055A, 055B, 183-403, 183A-403A, 183B-405B
• Raypak Gemini: 181-401
• Raypak RP2100 Series: 185-405, P-R185A-405A, C-R185A-405A, P-R206A, P-R266A, P-R335A, P-R336A, P-R406A

This combination gas valve requires proper installation by a licensed professional in accordance with local codes and manufacturer specifications. The millivolt system provides reliable operation without external power requirements, using pilot flame energy to generate operating voltage through the thermopile.