Taco PRV leaking

LionA29

Found my Taco PRV 334 dripping throgh the threaded port at the bottom. Any fix or recommendation of a better replacement?
Thank you

Rich_49

http://www.taco-hvac.com/products/hydronic_accessories/pressure_valves/boilerfeed_backflow/index.html

http://www.taco-hvac.com/uploads/FileLibrary/102-107.pdf
Don't forget a backflow device .

Maybe just a new 334 .

http://www.taco-hvac.com/products/hydronic_accessories/pressure_valves/boiler_feed_valves/index.html

kevin_58

That threaded port is for relief valve, correct pressure problem and repl

4Johnpipe

Any brand will drip if there is a pressure issue. Check that first. Is the expansion tank full?

LionA29

@4Johnpipe Do I remove tank to check if full of water?

Paul S_3

Yes...remove tank if its filled with water purchase a new one....if its not check the pressure in tank with a tire pressure gauge. ...it should be exact to your system fill pressure. If you get a new tank also check the pressure in tank sometimes there isnt enough...they come pre-charged at 12 psi....if your system requires a higher pressure use a bicycle pump to increase the pressure in the expansion tank

LionA29

@Paul S thank you, will check it out.

LionA29

@Paul S checked tank and it's not full. System off and Pressure in tank is 22PSI.( hydronic heating use for basement only)

4Johnpipe

Make sure you check the tank pressure while it is disconnected / separated or depressurized and room temperature.