I am thinking of starting a plumbing company, and am looking for opinions on a couple of names.?

I would not suggest any of the above. Having had allot of experience, I would suggest naming your company with respects to your area of service, and the specific type of service you want to concentrate on. Examples: Los Angles Rooter, Boston Water Service Co., Denver Plumbing, ect. Reason is that most of the marketing you do in the future will be "digital" or internet based, algorithms prefer companies/services named after specific location and service or product. If you brand your business using the affore mentioned process, your site will make it to the top of the search engines much easier and will be much more cost effective. Don't forget to buy your domain that matches your Business name, search to make sure it is available before naming your company. Best of Luck