Inline Water Grounding Fixture for Plastic Plumbing
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Solution Overview
Problem
The transition from metal to plastic piping in residential and commercial water systems has resulted in inadequate grounding of appliances and electrical panels, as plastic piping is non-conductive and does not provide a reliable earth ground.
Innovation Solution
An inline water grounding apparatus is introduced, featuring a metal or conductive fixture installed axially with plastic piping, equipped with external lugs for ground wire connection and an integral sleeve for enhanced contact with the water, providing a reliable ground reference without introducing offsets or leak points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal piping is used for water plumbing, then reliable grounding for appliances and electrical panels is achieved, but the piping system becomes heavier and more prone to corrosion
Solution Approach 1:
The grounding function is segmented from the piping system by introducing a separate grounding fixture that can be independently installed in the plastic piping system. This allows the piping to remain lightweight plastic while the grounding function is provided by a dedicated metal fixture component.
Solution Approach 2:
A metal grounding fixture serves as an intermediary component between the plastic piping system and the grounding requirement. The fixture includes a grounding electrode that contacts the water inside the plastic pipe, providing a conductive path to ground without requiring the entire piping system to be metal.
2Strength
If plastic piping is used to reduce weight and corrosion, then grounding capability is lost
Solution Approach 1:
The plastic piping maintains its corrosion-resistant property throughout the system, while a localized metal grounding fixture is introduced at specific points where grounding is needed. This allows the system to enjoy the corrosion resistance of plastic piping while obtaining grounding capability where required.
Solution Approach 2:
The metal grounding fixture acts as an intermediary that bridges the non-conductive plastic piping with the grounding requirement. The fixture's grounding electrode contacts the water inside the plastic pipe, creating a conductive path through the water to the metal fixture, thereby providing grounding without compromising the plastic piping's corrosion resistance.
3Reliability
If offset plumbing fixtures with pass-through metal conductors are used, then grounding is achieved, but water leak points are introduced
Solution Approach 1:
The grounding function is merged with the shut-off valve function in a single integrated fixture. The grounding electrode is incorporated into the valve body, eliminating the need for separate pass-through conductors that would create leak points. The grounding path is established through the water-contacting surfaces of the valve body itself.
Solution Approach 2:
The water itself serves as an intermediary medium for electrical conduction. Instead of introducing metal conductors that pass through the plastic piping (which create leak points), the invention uses the water already present in the pipe as the conductive medium, with the metal fixture contacting the water to establish the grounding path.
4Reliability
If complex grounding fixtures are installed to achieve reliable grounding, then grounding performance improves, but installation complexity increases
Solution Approach 1:
The grounding fixture is designed to perform multiple functions: it provides shut-off valve functionality, grounding electrode functionality, and water flow control. By combining these functions into a single universal fixture, the system achieves reliable grounding without increasing overall system complexity, as the same fixture type used for valve purposes now also provides grounding.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus effectively establishes a reliable ground connection for appliances and panels, ensuring safe discharge of electrical surges and compliance with electrical building codes, while maintaining the integrity of the plastic piping system.
Implementation Method 1
an integral sleeve of reduced diameter that extends into the plastic piping to establish an extended surface area contact between the electrically-conductive fixture and the water in the electrically-nonconductive piping
Data Source
AI summary
Water grounding apparatus for a water plumbing system constructed of plastic pipes comprises a metal or other electrically conductive fixture installed axially inline with the plastic pipes. The fixture includes one or more external lugs for ground wire connection, and an integral sleeve of reduced diameter that extends into the plastic piping to establish an extended surface area contact between the fixture and the water in the pipes. Alternatively, the integral sleeve can be constructed as a coil of conductive material to accommodate nearby elbows in the plastic piping. Advantageously, the fixture can be constructed as a modified inline water shut-off valve since shut-off valves are customarily installed in piping near the exterior wall of the building, and near water-related appliances such as water heaters.