Low Pressure: Efficient Irrigation for Every Garden

Discover the power of low pressure irrigation systems designed to fit any landscape. Whether nourishing a Grow Smart Responsive Drip Irrigation (RDI) garden with just 15 gallons a day, or managing a large native-plant garden with gravity-fed water and a precise timer, low pressure solutions make sustainable watering simple, reliable, and remarkably effective. Below, see real gardens putting these innovations to work.

The heart of this low pressure system is a durable, opaque 85-gallon tank, shown below, perched so its base sits two feet above ground and a full three feet above the garden beds. Rainwater is pumped in every five and a half days, ensuring an uninterrupted flow distributed by gravity at precisely one PSI for responsive, root-level watering. A glance at the tank’s surface is all it takes to track water levels—simple, practical, and effective.

85-gallon opaque rain tank used for low pressure drip irrigation

Low Pressure, High Yield

Low pressure water, finely tuned water management

85-gallon opaque rain tank delivers rainwater via gravity to three rows of cucumbers, tomatoes, and celery in a 40' × 25' garden.
Tank is filled every 5.5 days; water use is controlled at exactly 15 gallons per day—no more, no less.
The tank’s base sits 2 feet above the ground, with the garden 1 foot below, providing a 3-foot elevation drop for low, reliable pressure.
Delivers water at between 1 and 2 PSI: ideal for root-zone RDI Responsive Drip Irrigation GrowSmart™.
Visual tank-checks make water management fast and simple—just look to see how much remains.
No pumps, no waste, just responsive, measured hydration according to each plant’s real needs.
As the garden flourishes, mastering low-pressure management opens new opportunities for efficiency and better yield.

Rain Tank Gravity Drip System — At a Glance

Diagram of rain tank gravity drip irrigation system with labeled drip tape

Tank Size: 85 gallons (opaque rain tank)
Elevation: 2 feet above ground for steady gravity flow
Operating Pressure: 1–2 PSI (gravity-fed, pump-free)
Daily Water Use: 15 gallons per day
Refill Cycle: Every 5.5 days, topped up with rainwater
Garden Coverage: 3 rows (cucumbers, tomatoes, celery), 40' × 25' area
Purpose: Consistent, efficient root-zone moisture for maximum water savings