Shut off during long absence from home. Install a pressure regulator to protect against pressure surges. Check main valve annually for corrosion in open position.

After the first leak in galvanized pipes that are over 20 years old, do consider re-plumbing the entire house.

Modern supply lines are made of PVC. The lines are available with metal braid reinforcement and are permanently connected to the compression nuts. These newer types are less likely to rupture with age or jar loose during an earthquake. Check valves annually for corrosion in open position.

Inspect the copper lines immediately after installing or moving these appliances to ensure there are no kinks or leaks.

Inspect periodically for cracks and bulges. Consider replacing at 5 to 7 year intervals. Turn off the water supply after each use and especially when the machines will not be used for extended periods. 

Check periodically for leaks in the copper supply lines and tank. Insure it is properly strapped to the wall to resist earthquake shock. Install a pressure relief valve with a run-off line leading to the exterior of your home. Consider replacing 1 to 2 years prior to expiration of guarantee.

Periodically use the new enzyme based products for maintaining clear drain lines and avoiding unsanitary back-ups. If tree roots periodically clog your sewer lines, schedule an annual rooter service and avoid unexpected back-ups.

Correct conditions which allow rain water to pool around your home and potentially flow inside.

Inspect annually for obvious warn, missing tiles and shingles. Inspect and clean gutters and downspouts periodically.