Adapter for radiator valve when tail piece (stub) is too short

EdwinD

Just an FYI,

I installed a new 3/4" radiator valve, but the tail piece is too short. The distance between the tail piece and radiator is an additional 1/4" longer than what appears in the picture. The reason being, a portion of the old stub is still in the radiator, which I had to cut, saw and chip out.


I found a solution using a 3/4" Female x 3/4" Male Nipple Bush Adapter . I tried joining a close nipple with 3/4" coupler -- yet it was too long.

Here's the final result.

JakeCK

Does that say 304 stainless? Will that cause an issue with dissimilar metals because of the cast iron rad?

EdwinD

@JakeCK Correct - it says 304 stainless. Thanks - good pickup. Now that you mention it, I'm more concerned with the brass and stainless steel 304 interaction. I found a similar brass fitting to arrive tomorrow. Thanks.

Canucker

If it's hot water heating it won't matter. There shouldn't be enough oxygen in the water to support the galvanic reaction

EdwinD

@Canucker Thanks. Its a steam boiler - two pipe system.

EdwinD

I switched out the stainless adapter for a brass one (Brass Pipe Adapter 3/4" FNPT x 3/4" MNPT) from Amazon. It is about 1-1/2" in length. Just what I needed.

ethicalpaul

Looks great