While not necessarily musical looping-related in this particular instance, I had a dream last night about the (clients') toilet on the ground floor at that respite unit back in the very early 90s, which was not only directly next door to the plant room which the boiler and its associated equipment was installed (and hearing the periodical foghorning noise quite loud in that particular toilet being in the adjoining room), there were ghoulish-looking valves installed on the fully-exposed pipework in there too, which also creeped me out.
I even vividly remember the plasticky smell of the non-slip flooring in that toilet room (the stuff that has those silver glittery bits embossed on it). I really hated that particular toilet.
Luckily there were other toilets (and bathrooms) for client use upstairs in the building that I was also able to use, in whose rooms with the doors closed you couldn't hear that foghorning noise whenever it was going, though I still heard it resonating through the pipes under the floorboards in the corridor upstairs just above where the boiler room (downstairs) was. I used to use the upstairs toilet/bathroom located the farthest away from that spot with the foghorning noise, as it really used to freak me out.
I recall one evening whilst eating our evening meal in the dining area of the upstairs lounge (where us more able clients tended to eat our meals, and the less-able clients are their meals in the main dining room downstairs), I had heard said foghorning sound when I walked past the spot to go to the toilet and wash my hands just before dinner, and while I was eating I could hear that din endlessly looping in my head, despite the fact that the dining area of the upstairs lounge was right up the opposite end of the building and well away from the offending sound.
All the staff there seemed totally indifferent to that sound, even the nicer staff members, who fortunately outnumbered the stroppy, power-mad ones, of which there were only about 2 of. And they both told me to 'stop being silly' and to 'pull yourself together 'cause you're 13' when I panicked about that noise!
I still get panic attacks whenever I hear similar sounds today, especially if they're in a similar musical key; in the range of B to C.
On the flip side, it does seem that there's a much greater awareness and understanding of plumbing-related deficiencies nowadays (and the problems they can cause if unattended to), compared to back then.
But I'm still feeling a bit anxious and having panic attacks this morning after that dream. Me boring you all to death with this story has partly helped me to relieve my attendant stress.