I have used Harris Plumbing on several occasions, some being 'emergency' repairs, including a midnight call on a Friday night. Were on-site within to hours of my call.
On-time, on budget with high quality work and quality tradespeople. (You do NOT want to compromise with cottage plumbing!)
I was having busted pipes in the spring, from frozen pipes which had 'residual' water in them after draining in the fall. I keep my cottage heating on in the winter months at around 45F. However, the lengthy and usual power failures in Muskoka would result in minor un-drained water freezing in sections of pipe. Harris Plumbing re-piped all the critical/suspect areas (entire basement) and also graded piping high to low at (with drain taps) to ensure proper winter drainage.
New pressure tank also installed.
It just doesn't get any better than Harris Plumbing... period.