Modular Home Prices

I have a electric mobile home water heater that is leaking at fitting where the hot water connects. The connection is on the side 2 inches from the top. The connection is plastic a friend told me to put some plumber putty around the connection.

I was reading on the container of the plumbers putty and it stated not to use on plastic.

I have seen the spray foam but did not know if I could use this because of the hot water temp being 120 degrees.

Any Ideals the water heater is only a year old and I hate to replace it. The water heater was not purchaced by me so I doubt warrenty would be good.

Technorati Tags: home water, hot water, mobile home, plumber, putty, spray foam, water heater, water temp

I'm interested in possibly building/buying a modular home. I did some research online but I can't seem to find some information I need to be able to price out the final costs. Does the price of the home include the plumbing and electric? Does it include WAIR/CAIR? The added costs would include hiring a plumber/electrician to hook up everything, someone to pour foundation, driveway, etc. Am I forgetting some major costs?
If anyone has a modular home, I'd appreciate the feedback!

Technorati Tags: electrician, modular home, plumber, plumbing