The average salary for plumber jobs is £31,787. Re-piped our entire crawlspace i went down there after the job and was really impressed the guys didn't cut one corner. For further information, download the. Most of the time, a baxi 118 fault can be fixed in under an hour, and you won’t need a new boiler. Company number: 02366661 vat registration no gb 537-4569-15.