Piping an air vent on a relief valve tapping

Unknown

there is a 3/4 inch relief valve port next to the supply tapping . We used to combine this tapping with the air eliminator . But ASME frowns on this idea and I'm not sure why . I guess they believe there is a better chance of something corroding downstream with more fittings and choking off the relief ? If this was the case , what if we use brass for all the fittings from the 3/4 tee ?

Also , to make the 3/4 port eliminate air better , some of the guys have been using a 1 1/2 inch by 1 1/4 bushing , threaded all the way on the 1 1/4 - right into the supply with a 1 1/4 close nipple threaded into the bottom part of the bushing . The close nipple sits lower than the 3/4 relief and air elimination tapping in the boiler , hopefully supplying air free water to the system . Is this another no-no idea ? Thanks for any help .

todd s

Air eliminator

I was wondering the same thing Ron. Why isn't there an internal air baffle in these boilers? I would guess the majority of oil boilers are being sold as replacements. The space required to properly install an airscoop just isn't there in alot of homes.

Unknown

That is it

in a nutshell . Almost every job we install is in a tight spot and never have the required dimensions to pipe an airscoop to specs . Other brands of boilers we have used in the past that had a built in airscoop worked excellent . The majority of systems we replace are simple 2 zone baseboard , and a good purge with a simple air eliminator on the boiler is usually all we need .

I know after touring Burnham that adding an internal baffle would be a tall order , but I have to ask anyway . Customer support is top notch and I know they will at the least consider the idea .