I had a plumber pop round as I needed to remove a gas pipe sticking up out the concrete floor so I could lay self leveling compound for a nice clean finish to the room. He's capped it off and and I asked him about burying it and (he didn't say I couldn't) just said to dig around it a bit more and press it in so it's slightly lower, but now I've had some to think about this the more I think I shouldn't be doing that. Am I technically allowed to bury a capped off gas pipe in screed/self leveler? Plumber knew what my plan of the room was was and that the floor needed leveling/topping off and I needed a flush floor but just capped it off in the middle of the room not far from where the pipe popped up out the floor with little to no questioning. Has he just done exactly what I asked of him (cap a gas pipe) without taking into account the whole context of why I needed it capped and not offered a different solution that's needed for my desired outcome?