If you are seeing discharge from the relief valve vent

ensuring a secure 24V furnace gas valve operation

for pipes larger than 3 inches

Universal Replacement: Directly replaces RV52-3/4-CSA and RV52-66 models without piping modifications

What fluid types and temperatures can this valve handle

Grundfos 98126820 Pump 320819-301 If you are seeing dischargeThe Grundfos 98126820 MAGNA3 32 60 GF is a high efficiency 115 230V circulator pump engineered for modern hydronic systems requiring precise flow control. This model features a cast iron housing with a 6 1 2 inch port to port length, optimized for heating and cooling applications, including ground source heat pump systems and hot water recirculation. As a veteran grade ECM pump, it utilizes a permanent magnet motor to achieve an Energy Efficiency