Closed Loop System

closed loop system

Most newer homes have a Pressure Reducing Valve to keep water pressure at an optimal pressure for residential construction, which is usually between 50 – 80 psi.  The PRV will only allow water to go in one direction, this makes your home’s plumbing system a closed loop system.

A closed loop system can cause some problems due to thermal expansion. When water is heated it expands, this is know as thermal expansion. This is why cities such as Overland Park and Olathe require thermal expansion tanks to be installed when replacing the water heater.

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