NO CALL-OUT CHARGES. FIXED PRICE DRAIN CLEARANCE FROM £70,00, FREE QUOTATIONS. RAPID 24/7 EMERGENCY SERVICE. YOUR LOCAL DRAINAGE EXPERTS. Here at Cornwall Drains Ltd we are a local family run business & have been involved within the drainage industry for over the past 20 years. We pride ourselves on offering all of our customers a genuine RAPID 24hr 7 days a week emergency first class professional service at very competitive prices. CUSTOMER REVIEW. Came on a Friday afternoon at 5pm. The consummate professional; he worked quickly but thoroughly and cleared the blockage in short order. Was able to pinpoint a couple of problem areas that contributed to the blockage occurring and offer advice as to their rectification. Great value, I recommend Cornwall Drains highly and they will be the first company I call should I suffer drain problems in the future.