Will try and keep this brief, hoping someone will be along with some knowledge!
Part way through purchasing a 4 bed property with a septic tank. The tank was flagged on our survey as likely non compliant, vendor spoke with their waste management company at emptying who said its not compliant due to capacity, and we renegotiated the price so we could replace.
2 months on, solicitors now saying our mortgage lender doesn't lend on non compliant septic tanks, so we are now going back and forth with our vendor to figure out if it is, and a specialist survey is being booked.
Essentially, it complies with every one of the binding rules that apply (even though its pre 1983), apart from rule 10 on capacity. This rule seems vague, as it meets the capacity for the number of occupants currently living there (4, and we are a family of 4), and at waste emptying is always way under its max capacity. But because its a 4 bed house, British water state it should have capacity to treat 6, and that's where its not big enough - however, the rule seems to mention this in regards to systems built after 2006. Solicitors being totally unhelpful and saying its not their area of expertise.
Any ideas!?