Raypak Return Header for Avia Heaters | 264A & 404A | 019051FRaypak Return Header 019051F is designed for Raypak 264A and 404A heaters. It helps maintain optimal water flow and heating efficiency by ensuring proper circulation through the heater. Made from durable materials, this return header is built to withstand harsh pool conditions, ensuring long lasting performance. Easy to install, it is a key part of keeping your Raypak heater functioning at its best. This header is specifically designed for use with