Raypak | 018758F | UG/Bypass Assembly 105F 336-408 Kit – Genuine Replacement for Reliable Flow Control

The Raypak 018758F UG/Bypass Assembly 105F is a factory-original replacement kit designed for Raypak models 336–408. It ensures proper water flow regulation and temperature control for optimal heater performance.

Key Features:

• OEM Replacement Part: Direct from Raypak for perfect fit and function on models 336, 399, and 408.

• Integrated Thermostat (105°F): Maintains correct bypass temperature to protect the heat exchanger.

• Ensures Proper Water Flow: Regulates flow through the heater to ensure consistent operation and system efficiency.

• Complete Kit: Includes all necessary components for a straightforward replacement and reliable long-term use.

• Corrosion-Resistant Construction: Built from durable materials to withstand pool and spa conditions.

• Critical for Heat Management: Prevents overheating and ensures balanced water distribution within the heater.

Product Overview:
The Raypak 018758F UG/Bypass Assembly 105F Kit is engineered for use in Raypak gas heaters ranging from 336 to 408 series. This essential component regulates internal water flow and maintains a bypass temperature of 105°F, helping to protect the heat exchanger and ensure consistent heating performance. Whether replacing a worn or damaged unit, this OEM assembly restores proper operation and prevents premature heater wear due to flow imbalance. Easy to install and built to Raypak’s high standards, it’s a reliable solution for maintaining your heating system’s longevity and efficiency.