I have a small split system (Philco Phs25ha4cpi). The external component weighs 25kg, and I have mounting brackets like these:

two simple mounting brackets

And a wall made from bricks like these:

hollow brick

My question is what kinds of screws, and what quantity should I use to mount the bracket? I usually use these plugs for dry walls (article linked only to show reference photos, not for the text).

I CANNOT go through the wall, the other side is not mine.


  • 2
    Does this answer your question? How can I securely hang a very heavy object on wall made of hollow bricks? Also, be careful how you drill those bricks, hammer/SDS is likely to shatter them.
    – Tetsujin
    Commented May 6, 2022 at 8:00
  • "Does this answer your question?" No, the hollow wall anchors don't work unless I don't use the brackets I already have and I know the plugs exist, I linked one, but I don't know how many to use and what screws to use. Commented May 7, 2022 at 13:30
  • @Tetsujin "I wouldn't use solid wall plugs in hollow bricks." Those are not solid wall plugs, look here, it expands. "That's why the linked question suggests anchoring them right the way through, not just on the first layer." The other side of that wall is the neighbor's, I cannot go through. Commented May 7, 2022 at 17:04
  • @Tetsujin In Argentina they are sold specifically for hollow walls, its one of the photos in the MercadoLibre posting, showing how it works for a hollow wall. I have used them before and they hold quite well, and they fail only when the wall fails (catastrophically). Commented May 7, 2022 at 17:25
  • I can't read any of it, so I've no clue what I'm supposed to be looking for. Anyway, I'm done.
    – Tetsujin
    Commented May 7, 2022 at 17:28


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