Sounds like you want others to do your homework for you. Sorry old son, but when you grow up you will have to stand on your own feet, so now's a good time to start. Get searchin'.
basin trap=bottle,s trap,p trap adjustable or fixed depends on basin,location visable,hidden no real correct answer
which sys has the most pipes? again you can do a one pipe sys as the name suggests only one pipe but it can serve many legs/branches again no correct answer all depends on requirements
where are grommets most commonly used?again they can be used on gas cws tanks,hot water tanks,most younger plumbers have never had the privilage of makeing hemp grommets.hope this helps
Hep waste valve.............a system with a lot of rads...........kids with glue ear Who set the questions If they are as written then they are ambiguous questions tell your tutor it`s (lead)dressers @dawn
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