Gravelless Septic System Product Suppliers Directory InspectAPedia® -
Design manual for gravelless or no rock septic fields
No-rock or chamber septic drainfield product descriptions, sources
Septic leaching field product cost comparisons
Septic absorption field capacity & life comparisons
Septic Systems - Design, Inspection, Testing, & Maintenance
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This chapter discusses product suppliers for gravelless or "no gravel" or "no rock" septic
drainfield systems. Gravelless septic systems or "no gravel" septic system trenches use plastic or other prefabricated wastewater distribution systems which
are buried in soil without the use of surrounding gravel. Typical gravelless septic systems use a plastic chamber,
a geotextile-wrapped pipe, or a polystyrene-wrapped pipe to distribute effluent into the soil.
The necessary soil absorption area is provided
by the perforated surface of the gravelless septic system components (or by soil at the bottom of a chamber) themselves rather than by the gravel and
trench walls of a conventional septic drainfield. These systems can provide an acceptable effluent disposal system for sites with limited space for a drainfield
or where gravel is not available or is quite expensive.
Advanced septic treatment methods are discussed in separate chapters. Citation of this article by reference to this website and brief quotation for the sole purpose of review are permitted. Use of this information at other websites, in books or pamphlets for sale is reserved to the author. Technical review by industry experts has been performed and is ongoing - reviewers welcomed and are listed at "References."
This document is a chapter of Inspecting, Testing, & Maintaining Residential Septic Systems an online book on septic systems.
Qualified product or service providers may be listed at this website at no fee.
This listing of suppliers of gravelless or "no rock" septic system components is arranged alphabetically.
We and our website have no
financial or other relationship with any suppliers listed at our website and we do not endorse specific products.
The illustration at left shows
a typical residential gravelless wastewater disposal system using chambers.
Illustration courtesy of Infiltrator Systems, Inc., used with permission. (Infiltrator Systems Inc. contact information is listed below).
Crumpler Plastic Pipe, Inc. provides fabric-wrapped drainage piping 800-334-5071 Roseboro NC USA - "No-Rock TM Septic-Leachate drainpipe systems" are available in 8" and 10" systems.
In-Drain from Elgen is a combination of plastic
and geotextile used to treat septic effluent. Elgen products have been around for decades using variations on
this design. Elsewhere I've recommended their drainage mat systems for foundation waterproofing and other site
drainage problems. Eljen In-drains: this no-rock septic system uses gravelless trenches containing prefabricated units of geotextile fabric and cuspated plastic spacing cores are bordered on the sides and beneath by six inches of specific sand media, and are covered with native soil. A layer of protective fabric is placed on top of the units to prevent fine soil particles from clogging the filter fabric pores.
Hancor Gravelless "Blue Stripe" Pipe 888-FOR-PIPE 8" and 10" diameter. Quoting the manufacturer,
"When backfilled with native soil, Gravelless pipe provides safe and effective septic tank effluent treatment in sites determined to be suitable by your local health department.
The performance of gravelless systems has been verified through independent research performed at the University of Minnesota. This research evaluated the long-term acceptance rate of fabric-covered corrugated pipe for eight different soil types, and the pipe performed well in all soils tested except fine sand. Gravel-filled trenches in fine sand would likely perform in a similar manner."
Infiltrator Systems, Inc. provides chamber products 800-718-2754 Old Saybrook CT USA.
The manufacturer provides state specific design manuals for no-rock chamber systems for specific states in the U.S.
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Additional technical contributors & reference sources for this article are listed below.
Crumpler Plastic Pipe, Inc. Crumpler provides fabric-wrapped drainage piping 800-334-5071 Roseboro NC USA - "No-Rock TM Septic-Leachate drainpipe systems" are available in 8" and 10" systems.
Use links just below or at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.
How Big Should the Leach Field Be? includes a practical example using sample calculations and a table of soil percolation rate vs. field size
Design Basics for Septic Systems: Choosing Septic Tank Size, Leach Field Size - basic septic system volume and absorption system design guides.
Components of a Septic System- the Basic Parts of a Conventional Septic Tank and Leachfield, a chapter in the Home Buyers Guide to Septic Systems
Sketches of the Septic System Components Private Sewage Disposal Systems - Septic Drawing Library
Cesspools for more in-depth information about those systems.
Drywells for more in-depth information about those systems.]
SEPTIC SYSTEM DESIGN ALTERNATIVES
(1) (2) (3) (4) APPENDIX 75-A to Public Health Law, 201(1)(1) NEW YORK STATE WASTEWATER TREATMENT
STANDARDS - INDIVIDUAL HOUSEHOLD SEPTIC SYSTEMS. Portions of
the text of this web page (using paragraphs identified by parenthetical numbers (1)-(4)) are quoted from this document,
expanded with edits and additions by this author
"Gravelless Drainfields, Recommended Standards and Guidance for Performance, Application, Design and Operation & Maintenance",
Washington State Department of Health, an MS Word .doc file available at: www.doh.wa.gov/ehp/ts/WW/Gravelless2004.doc
Septic Tank Capacity vs Usage in Daily Gallons of Wastewater Flow, calculating required septic tank size, calculating septic tank volume from size measurements
Pennsylvania State Fact Sheets relating to domestic wastewater treatment systems include
Pennsylvania State Wastewater Treatment Fact Sheet SW-161, Septic System Failure: Diagnosis and Treatment
Pennsylvania State Wastewater Treatment Fact Sheet SW-162, The Soil Media and the Percolation Test
Pennsylvania State Wastewater Treatment Fact Sheet SW-l64, Mound Systems for Wastewater Treatment
Pennsylvania State Wastewater Treatment Fact Sheet SW-165, Septic Tank-Soil Absorption Systems
Document Sources used for this web page include but are not limited to: Agricultural Fact Sheet #SW-161 "Septic Tank Pumping," by Paul D. Robillard and Kelli S. Martin. Penn State College of Agriculture - Cooperative Extension, edited and annotated by Dan Friedman (Thanks: to Bob Mackey for proofreading the original source material.)
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