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Can I add skim port to existing pressure relief valve?

Zipper13
Zipper13 Member Posts: 214
Wondering if this is safe/code legal.

Filling out my list of projects to budget for this spring and having a skim port sounds worthwhile.

Curious if this makes sense and if it will be safe/legal/effective

Thinking of adding a tee to the existing PRV port, connecting the PRV to the vertical and then adding a drain to the other end of the horizontal to skim through.

I figure this would be cheap as I'd only need the tee, a nipple, the drain and some teflon tape.

Am I barking up the wrong tree here?
New owner of a 1920s home with steam heat north of Boston.
Just trying to learn what I can do myself and what I just shouldn't touch

Comments

  • Fred
    Fred Member Posts: 8,518
    I'm guessing this is a Burnham Boiler. I also have a Burnham. I put a short nipple in the boiler tapping, put a Tee on that nipple, put the PRV on the top opening of the Tee and use the end opening of the Tee as a skim port. I use a plug in the end when I'm not skimming. I would not put a spigot on the end as that might fail or someone might open it while the boiler is firing.
  • Zipper13
    Zipper13 Member Posts: 214
    Yessir, it's a Burnham.
    I like the idea of using a plug instead.
    Glad I'm not out of line for thinking of this.

    Thanks!
    New owner of a 1920s home with steam heat north of Boston.
    Just trying to learn what I can do myself and what I just shouldn't touch
  • Zipper13
    Zipper13 Member Posts: 214
    Also I'm shocked that you could tell it was a burnham from my bad drawing!
    New owner of a 1920s home with steam heat north of Boston.
    Just trying to learn what I can do myself and what I just shouldn't touch
  • Fred
    Fred Member Posts: 8,518
    Zipper13 said:

    Also I'm shocked that you could tell it was a burnham from my bad drawing!

    It wasn't the drawing. Burnham is about the only boiler left that puts the PRV on the side instead of on top.
  • STEAM DOCTOR
    STEAM DOCTOR Member Posts: 1,368
    edited February 2019
    > @Fred said:
    > Also I'm shocked that you could tell it was a burnham from my bad drawing!
    >
    > It wasn't the drawing. Burnham is about the only boiler left that puts the PRV on the side instead of on top.

    Peerless, Crown on left side. Burnham on right side
  • Fred
    Fred Member Posts: 8,518

    > @Fred said:

    > Also I'm shocked that you could tell it was a burnham from my bad drawing!

    >

    > It wasn't the drawing. Burnham is about the only boiler left that puts the PRV on the side instead of on top.



    Peerless, Crown on left side. Burnham on right side

    Wow, I didn't realize that Peerless and Crown were side mounted PRV's too.
  • You can as long as there is not a shut off valve between the PRV and the boiler.

    But be warned: Skimming through this tiny tapping is excruciating slow. Only the smallest of trickles works. Otherwise the water level rises above the tapping, and you are no longer skimming the surface...
    New England SteamWorks
    Service, Installation, & Restoration of Steam Heating Systems
    newenglandsteamworks.com
    Zipper13