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Pipe and Rock Drain Field System

A pipe and rock (washed aggregate) trench system measures 36” wide by 12” deep. separated by 2’ of soil, then another trench of 36” wide by 12” deep. This continues until you reach the health dept. requirements of a given number of trench feet. On a pipe and rock (washed aggregate) bed system the measurements are a little different.

First the width of the bed must be a number that is divisible by 3, such as 12’-15’-18’ or 21’ or etc. The length is determined by which of the above numbers that we use divided into the size of the required square foot drainfield. Pipes in rows is separated every 3’ maximum in the drainfield. As an example if it is a 429 square foot drainfield and the width is 15’ then your length is 29’.

Septic Tank Services Dixie Septic Pipe and Aggregate Rock System Volusia County
Pipe and Rock Septic System

Off loading the rock with remote control of the operation. Please note our patented clamps supporting the pipe, which assures you of the proper amount of rock in and around the pipe. Clamps are removed and used on the next job.

There are a number of alternative inexpensive systems on the market today. We have learned from experience that the Rock and Pipe septic tank system will give a longer free operation time lowering overall costs.


These may vary by your State Health Department requirements. In the State of Florida the above example is how we determine the sizing of a drainfield or trench as it is laid out.

The State of Florida requires 4” corrugated HDPE (high-density polyethylene) pipe with holes 65º up from the bottom on each side. It is suspended in the drainfield 6” off the bottom. We use patented clamps to hold the pipe at the proper grade level. Rock is put under the pipe, and then 4” of rock is poured around the pipe with 2” of rock above the pipe. Thus giving you a bed or trench of 12” thick of rock with pipe inside.

Without a doubt truly the oldest and best system with the longest life of any septic drainfield. Why? Because it filters the water one last time before going into the soil.

Continuing with how the Pipe and Rock system works: Waste water flows into the pipe from the tank, reaching the level of the holes. When the level of water is approximately at the 4 & 8 o’clock position in the pipe (looking at it from an end view) it then begins to flow out of the holes in the pipe through the rock. Water trickles down through the rock bed and gravity then pulls the wastewater into the soil below. As you can see there is always a small amount of water in the corrugated pipe with trapped bacteria in it helping to keep the bacteria from entering the soil.

This has been proven for hundreds of years to be the best system to filter one last time the wastewater before it enters the soil below. If your system does not have this feature, are you really protecting the ground water, and the aquifer, and our environment?

A small investment you are making, for the future of our well being and protecting our water for those who follow behind us. Join us in this effort.

Septic System FAQs

We are pleased to offer a few articles we have written over the past several years. We hope they might offer tips and answers to questions or issues you may have in regards to septic tanks, septic systems and drain fields. Please contact us directly with specific questions for a personal consultation.

Septic System FAQs
Smart Septic Systems
Going Green
Aggregate Rock System
Equal Distribution™
Pre-Contract Checklist
Septic Systems 101
Septic System Maintenance
Bio-Mat 101
Flushing Medication
Facts and Folklore
Pipe and Rock System
Septic Tank Installation
What is OSTDS?
Fat, Oil and Grease
Septic Industry Problems?
Sewer or Septic System?
Time to Take the Gloves Off!
Failing Septic Systems
Eye Opening Definitions
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Dixie Septic Tank, Inc.

335 N. Boundary Avenue
Deland, Florida 32720

Phone: (386) 738-3030
Fax: (386) 740-7666
Lic# SRO991327
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Home Page Failing Septic Systems Septic System Maintenance What is OSTDS?
Septic Services Going Green Bio-Mat 101 Fat, Oil and Grease
Smart Septic Systems Aggregate Rock System Flushing Medication Septic Industry Problems?
Concrete Septic Tanks Equal Distribution™ Facts and Folklore Sewer or Septic System?
Septic System FAQs Pre-Contract Checklist Pipe and Rock System Time to Take the Gloves Off!
Contact Us Septic Systems 101 Septic Tank Installation Failing Septic Systems
Septic Tank Cleaning Eye Opening Definitions
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