While the housing material has changed to stainless steel

ensuring optimal superheat control across varying evaporator loads

Built to withstand the corrosive effects of pool chemistry and thermal cycling

Specifically designed for use with the Series A-4400 condensate filters

Weil McLain 383-500-025 Gas Valve/Venture Kit Freon While the housing material hasThe Weil McLain 383 500 025 Gas Valve Venturi Kit is an essential OEM replacement component designed specifically for Ultra Gas Boilers (Size 155). As a veteran grade replacment gas valve, this assembly ensures the negative pressure regulated delivery of fuel required for high efficiency modulating condensing boilers. This Weil McLain Gas Valve Venturi Assembly is engineered to maintain precise air to fuel ratios, supporting the 5: 1 turn down ratio