I contacted Thetford to find out what I would need to convert a Tecma one button toilet to a two button system. They said all they needed was a switch. IS NOT IT. You will need a relay assembly that fits into the base of the toilet and a wire to connect to the new switch assembly. The additional cost was much higher than the switch and it wasn't economical. I just added my own relays and rocker switches to provide the functionality I needed. I am not satisfied with Thetford technical support. They need to train their representatives more.
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