Who it’s for / Regulators & counties
For regulators and county officials.
Everything on this website is pre-release. The Subfield retrofit enhanced treatment system is sold directly by Subfield. There is no online store or checkout yet: send an order request and the Subfield team handles the order from there, starting with whether your existing tank qualifies. A request is not a confirmed order, a reservation or a compatibility decision. No payment is taken on this website, and prices, availability and timing are not published here.
For the retrofit system, host-tank compatibility, treatment capacity, approvals, pricing and service intervals are not yet released.
What Subfield is.
- About Subfield
Subfield is developing one product: the Subfield retrofit enhanced treatment system, for qualified existing septic tanks.
- What this website does not claim
Product pages describe development targets, not released ratings. Compatibility with a specific tank, treatment performance, certifications and approvals still require engineering, testing and release.
- The treatment path
Preserve primary settling · Bring biology and air together · Protect the outlet · Check the actual result · Respect the existing site design
- The downstream system
No guaranteed drainfield restoration, universal soil compatibility, potable-water output or unrestricted reuse is claimed.
Approval and records.
- Installation planning stages
Obtain applicable design and permit approval before physical changes.
- Connected ownership
Homeowners, installers, maintainers and authorized officials need different tools. A shared installation record should make handoffs clearer without granting everyone control of the equipment.
- Planned official access
Review explicitly shared installation, permit, maintenance and laboratory records with scoped permissions.
Common questions.
Not published yet.
- State and local approvals
- Not published yet. Certifications and state or local approvals will be published only when they are established. Approval status
- Laboratory and performance data
- Not published yet. Laboratory evidence establishes the water-quality result. Equipment status or clear-looking water is not a substitute for laboratory evidence.
- Documents for review
- Not published yet. Configuration-specific documents and reviewed terms are pending. Document library
Ask about review and records.
An inquiry is not an order, a reservation or an installation approval.