Buderus sacrificial anode

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RMatty
RMatty Posts: 6
in THE MAIN WALL

Hi guys I need to check/replace the anode rod in my Buderus S32/5W indirect. I’m wondering do I need to use tape or dope on the threads? It has a gasket on it between the threads. Thanks in advance.

IMG_9943.jpeg

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  • hot_rod
    hot_rod Posts: 28,705

    That looks like a BSP straight thread, so the gasket is what makes the seal. There may be a recess in the tank fitting to captivate that seal, prevent it from squishing out.

    Make sure the old ring is cleaned out of the tank fitting for a good flat, clean seal.

    No harm in putting a small amount of pipe thread teflon on the thread so the threads slides easily. I would not use teflon tape.

    Biggest issue is folks ted to over-tighten that type of connection thinking it is a tapered thread doing the seal. That crushes the seal and more you tighten the worse it gets.

    A bit more that hand tight should compress the seal without damaging it. If you dig deep enough you could probably find a torque specs for that connection.

    Hemp or teflon string is another way to seal a straight thread connection

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream

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