Hayward 6" Venting Kit for H150-H250FD Heaters - Hayward Pool Heater Venting
How To - Create your own Hayward Pool Gas Heater Vent - YouTube
Hayward UHXNEGVT14001 Indoor Vent Adapter Kit, H400FD, Negative-Pressure (Vertical) Pool Heater Replacement Parts - Order a UHXNEGVT14001 Hayward Indoor Vent Kit - We Ship H400FD Hayward Vent Adapter Kits Fast