I have a small pool cabana that sits on the ground i.e. it is not sitting on footings that go below the frost line. I would like to add a bathroom to this building, but am concerned that frost related movement of the structure will damage the plumbing e.g. the toilet flange is fixed to the floor and might snap if the building moves, will the copper joints be loosened etc. There must be a solution for this since mobile homes have the same issue don't they? How do I solve this problem?

Thanks

A mobile home has a flexible coupling that connects to a PVC drain beneath the home. They also have a furnace which you don't have. How do you plan to prevent the water pipes and toilet from freezing in the winter, no furnace in the cabanna.

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Originally Posted by naples

I have a small pool cabana that sits on the ground i.e., it is not sitting on footings that go below the frost line. I would like to add a bathroom to this building, but am concerned that frost related movement of the structure will damage the plumbing e.g., the toilet flange is fixed to the floor and might snap if the building moves, will the copper joints be loosened etc. There must be a solution for this since mobile homes have the same issue don't they? How do I solve this problem?

Thanks

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Thanks. Is this flexible coupling available at most plumbing supply stores? I am going to have blowouts placed in the water lines so that they can be evacuated in the fall. The toilet and sink trap will be filled with potable water antifreeze.

Speedball1 or Iamgrowler can help you better with this item. They should be here later today. I think its just a neopreme collar but not sure.

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Originally Posted by ballengerb1

Speedball1 or Iamgrowler can help you better with this item. They should be here later today. I think its just a neopreme collar but not sure.

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You're looking for Fernco Flexible Couplings, (see image). Click on; Fernco, Inc. to check them out. Good luck, Tom

Thanks for all of your help. I will look into the Fernco connectors.

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Originally Posted by naples

Thanks for all of your help. I will look into the Fernco connectors.

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You can also use 'ductile' PVC to plumb the portions below grade.

I've plumbed a number of house boats where flexibility in the lines below the sub-floor is required -- "Ductile" PVC is soft and flexible enough to move with the building.

Thanks for the additional information about ductile pvc. I'll look into this as well.