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Discuss Flies from vents into cavitys in the Gas Safe Register Forum - Public Forum area at

  1. Dylandyl96

    Dylandyl96 New Member

    I am aware of flues being 300 from an openable window or vent but what if the vent goes into the cavity but not the room inside? Where does that stand?
  2. rpm

    rpm Trusted Plumber

    Think it is 600mm.
  3. scott_d

    scott_d Plumber GSR Top Contributor!!

    What’s the rest of the story? Looking to fit a new boiler?
    • Like Like x 1
  4. Dylandyl96

    Dylandyl96 New Member

    Yes fit new boiler where old boiler was, vent is just under 300m which is the requirement but it only goes into the cavity not the house/ room
  5. scott_d

    scott_d Plumber GSR Top Contributor!!

    Too close
    Has it been fitted?
  6. KingDoey

    KingDoey Plumber GSR

    Just seal the vent up
    • Like Like x 1
    • Agree Agree x 1
  7. Dylandyl96

    Dylandyl96 New Member

    Not yet will change vent for bricks
  8. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Yep best way
  9. garygvl

    garygvl GSR

    if youve got a vent that just goes into the cavity but not directly into the room you have no idea where poss exhaust could go. just seal it
  10. Chuck

    Chuck Well-Known Member

    . . . and install a replacement vent in another location.

    Vents are needed to prevent condensation, rot, etc.
    • Winner Winner x 1
  11. garygvl

    garygvl GSR

    agreeish depends on the age of the house. most of the old vents wernt sleeved so internal vent could have been already blocked. if not sure where flue discharge could go err on the side of caution, cover your own back and advise cust why you are doing this
    • Agree Agree x 1