Not sure what you need a plumber for . But! Assuming it’s not gas I.e boiler install etc you can do it . I know you can . Because I did it . As mentioned hep2O is Lego for “ plumbers “ . I’d explain your exact issue / what you want done up here .You’ll get tons of help . Save you a fortune ! . Then when it leaks you can blame yourself but also fix it 😊