Visit the soo's newest pub - the boiler room - now open! In each and every one of us there is an “experienced” plumber, a heathcliff huxtable if you will, ready to tackle any plumbing related problem that comes our way got a leaky pipe? sounds... However, although many of our clients are certain a drain survey is something they require, not many are sure of the cost of carrying out the process so, how much does a cctv drain survey cost? New boiler installation london.