Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Question on Expansion tank replacement
I think my expansion tank is/has failed. Was here when I moved in and assume it is quite old. I hear rushing water when the pump turns on and the hy-vent is leaking. Need some advice on where best I need to open to release some of the pressure and drain to replace the tank. I have attached a few pictures. From the looks of it, it will be difficult to get the tank out once detached since the OWB exchanger is right in the way. So I will be drilling a hole in the expansion to drain water out. The house is new to me in the last few months and I have been focusing on immediate issues. And seems to have been an issue for a while judging from the sludge dripping down. So now it is my focus to resolve these issues .
I attached a pic of Backflow valve that is in place after the water line into the system. I am going to shut that off. Quick question is what is the vent and where should that be running to? Everything in my boiler room runs into the floor and down into a finished basement. So cannot follow it to where it terminates. So for my info where should it be going?
There are 3 valves I can open to drain(all pics attached). Boiler drain, Drain on top of hot water in manifold and drain below expansion tank and OWB exchanger.
I am uncertain which drain is best? Assume top drain will not impact the expansion tank since it is above it? So drain below the expansion tank/OWB EXC is best? Boiler drain is overkill?
I also will put in a drain and valve above the expansion tank when I am at it to make it easier, if there is room!
Thanks for any help
- 115K All Categories
- 82K THE MAIN WALL
- 2.6K A-C, Heat Pumps & Refrigeration
- 38 Biomass
- 396 Carbon Monoxide Awareness
- 2.8K Thermostats and Controls
- 1.5K Domestic Hot Water
- 4.1K Gas Heating
- 102 Geothermal
- 145 Indoor-Air Quality
- 2.5K Oil Heating
- 37 Pipe Deterioration
- 627 Plumbing
- 4.5K Radiant Heating
- 341 Solar
- 12.7K Strictly Steam
- 44 Water Quality
- 568 Buy, Sell, Barter
- 29 Industry Classes
- 62 Job Opportunities
- 11 Recall Announcements