I have a dispute between my plumber and the inspector and I'm hoping someone here can help out.
I have a WM CGI-5 propane direct vent boiler that was planned to be a direct vent however my plumber determined that for whatever reason he would connect it to the chimney as the old oil furnace was.
The vent is 3" stainless that travels 2 ft vertically and then through a 90 deg elbow into the old masonry pipe the boiler used which is a 6" opening that he has sealed with some kind of mortar.
The plumbing inspector is concerned with this and in the Weil Mclain installation manual - its clearly states for chimney venting a 5" pipe is required. I assume this is a negative pressure scenario.
However the plumber claims that as this is a positive pressure vent the 3" vent is correct - the WM manual just doesn't cover direct vent into a chimney. Who is correct?? Help please.
I have a WM CGI-5 propane direct vent boiler that was planned to be a direct vent however my plumber determined that for whatever reason he would connect it to the chimney as the old oil furnace was.
The vent is 3" stainless that travels 2 ft vertically and then through a 90 deg elbow into the old masonry pipe the boiler used which is a 6" opening that he has sealed with some kind of mortar.
The plumbing inspector is concerned with this and in the Weil Mclain installation manual - its clearly states for chimney venting a 5" pipe is required. I assume this is a negative pressure scenario.
However the plumber claims that as this is a positive pressure vent the 3" vent is correct - the WM manual just doesn't cover direct vent into a chimney. Who is correct?? Help please.