We were asked to attend a property by this customer to give him our opinion on why he was experiencing drainage smells inside. We were informed that he had Thames Water and Dyno Rod come to his property but they could not be certain of the cause of the smell of drainage. We emailed the customer stating we would come & carry out a survey for £80 for a 1 hr survey. We actually spent 2 hrs 10 mins and still only charged £80. During our visit the customer showed us a survey that he had done due to drainage problems dated November 2012. During our survey we informed the customer that the drain frames and covers that he had inside of his property were old sizes and are no longer made. We advised onsite that the drain chambers will need to be modified/ rebuilt to meet current building regulations. The customer did not want us to do that. During the next few weeks the customer carried on looking to see if he could find the drain covers in the old sizes, which he could not , like we originally said. The customer then wanted us to adapt the 2 drain chambers in an unsafe way which would not meet building regulations and in our opinion would not be safe. We refused to carry out this unsafe/dangerous and against Building control way of working how the customer wanted. The customer then said that he had a quote of £400 each from Dyno Rod & they will adapt the drains to his specs, so we said " I would take them up on that offer" Customer also had over 25 emails with help and advice.