The HydroCourt system

A HydroCourt is a clay tennis court that waters itself from underneath. Moisture rises from six lined cells below the Har-Tru (opens in a new tab) surface, so the court plays the same from the first match of the day to the last, with far less daily upkeep than a sprinkler-watered clay court.

How the water gets there

Each of the six cells is lined and filled with compacted stone. Every cell has its own control box, filled with water that feeds the cell through pipes.

The water level under the court follows the level in its control box. Raise the water in the box and the court holds more moisture; lower it and the court holds less. That one adjustment is how a HydroCourt is tuned to the way its players like it.

Section through a HydroCourt cell and its control boxIllustrative drawing, not to scale. Water enters a control box beside the court and flows through a pipe into the panel pipes at the bottom of a cell lined with a polyethylene liner and filled with compacted stone screenings, under about one inch of Har-Tru HydroBlend. The water level under the court matches the level in the control box.
  1. Har-Tru HydroBlend, about one inch
  2. Compacted stone screenings
  3. Water table
  4. Panel pipes
  5. Polyethylene liner
  6. Control box

Why it plays better

Clay courts watered by hand or by overhead sprinklers get wet in patches: some areas turn soft while others go dusty, and the court needs watering again as the afternoon warms up. A HydroCourt keeps a steady water table under the whole surface instead, so the clay stays firm and evenly moist all day.

Specifications

What goes into every HydroCourt, from the playing surface down:

Playing surface
Har-Tru HydroBlend, about one inch
Base
Compacted stone screenings
Water delivery
Panel pipes
Water control
Adjustable control boxes, one for each cell
Cells
Six subsurface-irrigated cells
Liner
Polyethylene liner

The control boxes set the court's moisture, and with it how the court drains and how often it needs maintenance.

Who builds them

On the West Coast, HydroCourts are built and maintained only by Soft Court Services. Its owner, Anthony Lopez, is the authorized successor to the original HydroCourt builder. He handles new courts, renovations and ongoing care, and is glad to talk through owning, building or playing on one.

To talk about a HydroCourt, call Anthony at (805) 705-2020