In case you want to become a water heater through apprenticeship, you will have to approach the local plumber's union, who can help you to find a professional plumber willing to hire an apprenticeship.
It water line repair is advisable to speak to neighbors and friends regarding the same. If any of your neighbors or friends has had a plumbing emergency and has been happy with the plumber they engaged then it is best to contact the same plumber. Family may also be of some help as far as recommendation is concerned but neighbors are a better option because they will give you details of an agency in the same area as you.
If you bought the same unit it should line right up, if you were unable, you will need to remove or add length to the existing piping. This may require you to splice together copper with plastic, don't let this scare you the hardware store will have all of the necessary parts.
OR, you can think about developing a group, where relationships prevail, your time and efforts come with great rewards, and you can multiply your efforts through helping others succeed, as they help you with introductions and referrals. So with much less time and effort, you can benefit from creating your own referral group.
One tip is to avoid hiring a plumber, who is a part or who is representing a company. They usually work on a commission basis. The company usually has a flat rate for every plumbing service and the plumber's commission will be added up to the company's charge. This is one of the main reasons why some plumbers charge you with a ridiculously high amount of money for their services. Opt for freelance water line repair plumbers instead. They work for themselves, so the price is usually negotiable.
From your own point of view, it is important that the plumber be trustworthy and credible. Ensure the plumber comes with at least two strong references which you can verify. This will help you be more secure and suffer less anxiety.
Re-coat the RV roof every two years. There are a several products for re-coating your RV's roof. Many will products recommend to re-coat every year, but it's not necessary, every two years is perfectly fine. A great affordable option is Camco RV Pro-Tec Rubber Roof Care System.