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Re: MT 18 1/2 ' 1979 Chevy Sewer GrayTnk by Jerelyn
Post New Message Yes, I had the same problem with my sewer tanks. I have the same MT of the same year, 1979. They are of a poly material. I repaired mine by using my dremel tool to smooth out the rough areas. Then I used a fiberglass patch to repair the cracks around the drain pipes. I also retrofitted the black water tank with a cleaning kit. Easy to install and you can find the kit at any RV store. What it does is on the opposite end (starboard side) of the tank you install a check valve with a spray nozzle and a hose that is routed to the port side of the tank (service side). Yes you have to drill a hole in the tank to insert the spray nozzle with the check valve. You are able to connect a water hose to it and the pressure will open the check valve and spray water inside the tank to rinse it out after you dump the black water. The check valve keeps the black water from going backwards into the hose. The hose is routed to the same side where you dump the water makes for easy connection and really cleans out that black water tank. You can also replace the drain valves, they come in a kit either as a pair or individually sold.

I have everything working in the MT and we use it 2 or 3 times a year. We put antique tags on it last year. I was forced to live in this RV for about 6 months back in 2010 when I was transferred to a new location with my job. I lived in a state park while looking for a house to buy and sell my other house. I have replaced just about everything but the stove and potable water tank. Replaced carpet, re-covered the couch and chair, and made curtains with a liner that blocks 100% of the sun, this way you can park under a street lamp and block the light.

The last thing we replaced was the fuel tank. We replace it with a stainless steel tank but about half the size of the poly tank. The poly tank was 36 gallons and the weight of the gas when full would flex the tank enough while driving down the road that it would crack the tank under its own weight and cause it to leak. After repairing it 4 times we went with a stainless steel tank, but a 17 gallon tank is what we replaced it with. We could have had a custom tank made but it was too costly. I feel much safer with that stainless steel tank, don't worry about leaking gas anymore.
All Messages in ThreadAuthorDate
Post New MessageMobile Traveler Manual Keith Bettez 10-4-05  
  Reply to MessageRe: Mobile Traveler Manual Sherri 11-6-09  
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  Reply to MessageRe: Mobile Traveler ll owners Manual Bob Jamison 1-19-11  
  Reply to MessageRe: Mobile Traveler Manual Walter 7-6-06  
  Reply to MessageRe: Mobile Traveler Manual clifton taylor 5-6-11  
  Reply to MessageMT 18 1/2 ' 1979 Chevy Sewer GrayTnk Len 7-6-14  
  Reply to MessageRe: Mobile Traveler Manual Len 7-6-14  
  Reply to MessageRe: Mobile Traveler Manual steven 7-26-14  
  Reply to MessageRe: Mobile Traveler Manual Len Mathieu 3-7-14  
  Reply to MessageRe: Mobile Traveler Manual Terry Dean 4-20-14  
  Reply to MessageRe: Mobile Traveler Manual Len Mathieu 3-7-14  
  Reply to MessageRe: Mobile Traveler Manual Jeff Loghry 4-28-12  
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      Reply to MessageRe: Mobile Traveler Manual Ed 9-8-09  
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      Reply to MessageRe: Mobile Traveler Manual Terry Heenan 3-6-11  
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                        Reply to MessageRe: Mobile Traveler ll owners Manual AmNda 9-12-15  
                          Reply to MessageRe: Mobile Traveler Manual David Monnastes 9-7-14  
                            Reply to MessageRe: MT 18 1/2 ' 1979 Chevy Sewer GrayTnk Jerelyn 7-9-15  
                              Reply to MessageRe: Mobile Traveler Owners Manual Butch Clark 12-10-17  
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