Nassau: (516) 731-1765 | Suffolk: (631) 968-4212


Hydrostatic Pressure Relief System

What is a French Drain or Hydrostatic Pressure Relief System?

A French Drain or a hydrostatic Pressure Relief System is drainage system that is installed in your basement or crawl space. The system is installed around the perimeter of the basement or crawl space next to the foun­da­tion’s foot­ing and beneath the base­ment floor. This sys­tem address­es seepage by col­lect­ing water that comes up from beneath the base­ment floor and through foun­da­tion walls. The system is connected to a Sump Pump which ejects the water from your home resulting in a dry basement or crawl space!

Diagram of a Sump PumpMan Waterproofing the Basement Floor
Waterproofing and Insulation at Construction Site

How Do We Install a French Drain or Pressure Relief System?

  • Install dust mitigation.
  • Remove the con­crete floor around the perimeter, 1 foot wide from the foundation wall.
  • Dig Trench (Approximately 1 foot in depth)
  • Install ¾ inch washed gravel pitched to the sump basin.
  • Install 4-inch perforated pipe.
  • Install additional ¾ inch washed gravel.
  • Cement top of channel leaving floor level with the existing floor.
  • Install Sump Pump and plumb to the home’s exterior.

All Our Work is Guaranteed for 10 Years!

What Additional Servies Do We offer in Conjunction with a French Drains Systems?

  • Sump Pumps
  • Window Well Taps- A Drain installed in your basement’s window well that is connected to the French Drain System which prevents your window wells from filling with water.
  • Battery Back Up Sump Pumps
  • Floor Drains
  • Basement Landing Drains
  • Basement Floor Raising
  • Vapor Barrier and Drainage Board
  • Dehumidifier

Do I Need a French Drain?

The first step in determining if you need a French drain is to call us for a free evaluation. Many waterproofing companies on Long Island only install French drains or Hydrostatic Pressure Relief Systems and do not provide exterior foundation waterproofing solutions which results in deceptive sales tactics and/or the installation of a system that does not correctly address your basement’s water seepage. If you have a foundation crack causing water seepage, the logical approach would be to repair the crack and stop the water from entering your basement or crawl space. French Drains or Hydrostatic Pressure Relief Systems are used to combat ground water meaning perched or water table issues that are causing water to rise through your basement’s floor or at the cove joint. French Drains can be used as a control measure for water entering your foundation through a crack when outside excavation is not feasible. 

Why Choose Us?

E&M has been around for 45 years and is honest. We have installed over 3000 French drain systems. We offer several different solutions and will ensure that your basement or crawl space flooding is addressed efficiently and economically. All our work is guaranteed for 10 Years. Our evaluations are free, give us a call.