I think mine is different..... the white valve is welded onto the
tank. Infact the white part of mine is broken and that is what is
leaking....
gene
>>Need a little info. We are installing our macerator and at the same time I
>>guess we are going to have to remove the Original valve at the tank as we
>>had a small leak between the tank and the valve an now with all the pushing
>>on the pipes we now have a larger leak.
>>Before removing can someone tell me exactly how it is attached to the tank
>>other than the 4 bolts at each corner. In sequence what will we find?
>>Marlene
>
>Marlene - the back side of the Thetford valve is a stainless steel plate
>which has a special round gasket that fits loose between the square
>plastic flange on the tank and the stainless steel plate on the
>valve. Note that Valterra valves and parts do not fit. The GMC had a
>Thetford valve. If you can't find that round gasket, I carry an extra one
>with me and can send it to you. Its about $6 give or take a
>little. There is an RV dealer here in Santa Fe that carries them.
>
>Unless the valve has been disturbed it is likely that your leak is not
>that gasket but actually inside the while plastic slide part of the
>valve. On the inside of the stainless steel plate there is a gasket glued
>to the stainless steel plate which the slide valve covers when the valve
>is closed. I have never found anything that will reglue it to the
>plate. These have a tendency to break loose after many years of use and
>Thetford made a kit that was comprised of a new stainless steel plate with
>the gasket and a new slide for the valve. You probably won't find any
>kits anymore but you might find a valve. Quite expensive (maybe $40 or 50
>if you can find them). I found a source for a limited amount of valves
>made by another manufacturer that used the same stainless steel plate and
>gasket ($25 plus $3.20 shipping and when they are gone they are
>gone). You can drill out the four brass rivets that the mounting screws
>go through and replace the stainless steel plate with the one that I found
>to repair the valve. You don't have to remove the white part of the
>original Thetford valve from the pipe that it is glued to.
>
>If the four screws that hold the valve to the tank flange are rusted they
>will probably strip out of the square plastic tank flange. No
>problem. Just drill out the holes with a 1/4" bit and use four stainless
>steel bolts, washers and nuts to fasten the valve back to the flange.
>
>I am leaving on Tuesday for the Phoenix area for about a week or 10 days
>so if you need anything sent to you let me know right away.
>
>Emery Stora
>77 Kingsley
>Santa Fe, NM
Genef -- 77PB/ore/ca
GMC MOTORHOME INFORMATION
mr.erf
http://www.california.com/~eagle/ http://www.california.com/~eagle/
