If none of these materials is available to you you can always elect water quality to soak rags or towels in hot water and wrap them around the frozen pipe. This will probably take longer than any of the methods previously mentioned.
To find a plumber, all one has to do is flip and run through the Yellow Pages or do a search on the Internet. From there you will see loads of plumber whom are advertising to get your job. The next thing you should do as a consumer is to take remember that there some plumbers whom advertise 2 different ads in the same place. Thus it is important to not water line repair make a rush decision. Look through the list of plumbers available and call a few (minimum of 3).
One other common design that is considered "washerless" was made famous by Delta and copied by several other makers. It uses little "cup" seals that fit over springs recessed in the back of the valve body. The springs press these "seals" against the cartridge and regulate the flow through little tapered openings in the cartridge. If you have one of these and it's dripping, changing these springs and seals will usually correct it. Here's a tip. Once you have the cartridge out of the way, insert a phillips screwdriver into the seal and pop both the seal and spring out. Stick the new ones on the end of the screwdriver to help guide them into place. This is especially helpful if you don't have long slender fingers.
Working on the gas lines is also a complex job that only a licensed plumber can handle because it is very dangerous. Small leaks can't always be detected by odor alone, but a licensed professional has the proper equipment that's needed to ensure that you don't have any leaks in the line.
Check that your plug holes and waste outlets are clear of hair and solidified soap also check the "U" bends or traps under your sinks for potential blockages. Occasionally pour boiling water line repair down your sinks and shower wastes not forgetting the washing machine trap. Look outside too for any weeds or leaves that may be blocking gutters, gully's and waste outlets.
People who own rental properties are great ones to give you information. With all of the service people needed for maintenance on their units, they typically know who to call and what level of work they perform. Most property owners will be more than happy to give you the information you seek. In fact, they were probably in your shoes at one time.
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.