Why does the same drain block every few months?
A drain that blocks, clears, then blocks again is telling you something. Usually it is not the blockage, it is what the line is being asked to carry.
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Adding a bathroom? Whether the existing drain will cope
New fixtures nearly always get tied into the drainage already under the house. When that is fine, when it is not, and what to check before the plans are final.
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Running out of hot water? It may be sized for a smaller household
Running out every morning is usually not a fault at all. How to tell an undersized system from a failing one before anyone quotes you.
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