Serving bristol, southington, avon, manchester, hamden and the rest of connecticut! Our engineers use the latest in specially designed cameras to survey drains, via the manholes on the premises. So what should you expect from a home buyers cctv drainage survey ? If required, you'll receive a replacement boiler up to £ the plan will not cover the cost of installing the replacement boiler please refer to our. Questions? comments? suggestions? issues? Find.