Denver's Top Rated Local Drain Cleaning & Plumbing company! The Right Prices: When you're having problems with your drains and sewer, you're not quite thinking straight. Too many companies take advantage of the situation, but Garvin's will never do that. After all, we clean drains, not bank accounts! Speedy Service: When something is wrong with your drains, you don't want to wait. We can get to you 24-hours a day, 7-days a week.