Rusted/leaking connection on boiler

[JT42]

Three years ago you guys were a savior for me and I'm hoping my luck will continue. I have a TT Prestige Solo 110 water boiler. The nut securing the copper pipe to the "Boiler Piping - Supply Short Assembly" is rusted and leaking. What steps are involved in replacing the nut other than busting it loose. It appears that I need to stop the water flow and there seems to be shut off valves, but I've never fully understood the direction of the flow. Any advice and/or suggestions will be appreciated.

 

[Leon82]

the inlet and outlet should be marked on the boiler and the pumps have arrows on the casting for flow direction.

without a picture its hard to say, but you may have to cut a pipe to replace it

 

[Sponsor]

 

[JT42]

the inlet and outlet should be marked on the boiler and the pumps have arrows on the casting for flow direction.

without a picture its hard to say, but you may have to cut a pipe to replace it

 

[JT42]

Leon, I'll try to post some pictures. "Leak" shows the rusted nut where the connection is leaking. "Pipe connections" is the pipe setup feeding the boiler. "Shut off & Drain" is the outflow pipe that goes to the radiators. The return pipe has the same setup. If anything else would help let me know. Thanks in advance.

 

[NY_Rob]

Looks like some knucklehead used dielectric unions on the boiler connections.... which is a no-no.

They need to be cut out and replaced with proper brass unions.

The other boiler connection with the dielectric union needs to be replaced too.