Description

Sun-Mar CENTREX 3000 NE Non-Electric Continuous-Flow Remote Composting Toilet — High-Capacity, Off-Grid Heavy Use

Product Description

The peak of Sun-Mar’s off-grid composting toilet lineup. The CENTREX 3000 NE is the non-electric version of the CENTREX 3000 — a high-capacity, continuous-flow remote composting system built for very heavy cottage use or medium residential applications where power is unavailable or unwanted. Like its electric counterpart, the CENTREX 3000 NE features Sun-Mar’s unique continuous-flow drum design: as the drum rotates, compost moves forward along the longer, larger drum and drops automatically into a collection housing at the end of the unit. Under normal operating conditions, the drum does not need to be reversed for emptying. Odor control is handled by a 4″ vent stack in place of a powered fan, and an optional 12V fan is available and recommended for heavy seasonal or residential use. Compatible with both waterless AF toilets and 1-pint ultra-low flush toilets — purchased separately — the CENTREX 3000 NE installs away from the bathroom entirely, delivering Sun-Mar’s highest off-grid composting capacity in a fully self-sufficient system.

Unique Continuous-Flow Drum Design — Compost moves forward along the drum with each rotation and drops automatically into the collection housing at the end of the unit. Under normal operating conditions, the drum does not need to be reversed for emptying — the defining advantage of the 3000 series over all other Sun-Mar Centrex models.
Highest Off-Grid Capacity in the Sun-Mar Lineup — Supports 5 adults or families of 7 for continuous residential use, and up to 8 adults or families of 10 for seasonal and vacation use — the top-rated capacity of any non-electric Sun-Mar system.
Fully Non-Electric Operation — No built-in heating element, no fan assembly, no power connection required. The 4″ vent stack provides natural chimney-style airflow through the composting chamber for odorless operation.
Optional 12V Fan Available and Recommended — No fan is required for standard installations, but the 12V fan is recommended for heavy seasonal or residential use and is available as a separate purchase.
Remote Composter Design — The composting unit installs separately from the toilet in a basement, crawl space, or adjacent room, keeping the bathroom conventional in appearance.
Compatible with Two Toilet Types — The CENTREX 3000 NE can be used with either an AF waterless toilet or a 1-pint ultra-low flush toilet, both purchased separately. More than one toilet may be installed depending on needs and available space.
4″ Vent Stack and 1″ Drain Required — Must be vented via 4″ thin-wall PVC per the guidelines in the owner’s manual. A 1″ OD drain is recommended in all applications.
Collection Chamber Ships Separately — Due to the unit’s size and configuration, the collection chamber ships in a separate box from the main composting unit.
Versatile Installation — Suitable for cabins, cottages, homes, businesses, resorts, camps, treehouses, and workshops.
3-Year Parts Warranty — All Sun-Mar composting toilets are backed by a 3-year warranty on parts.

Specifications

Specification	Detail
Model	CENTREX 3000 NE
Type	Non-Electric Remote Composting Toilet System, Continuous-Flow Drum (composter unit only)
Compatible Toilet	AF waterless toilet OR 1-pint ultra-low flush toilet(s) (purchased separately)
Number of Toilets Supported	One or more
Capacity — Residential/Continuous	5 adults or families of 7 per day
Capacity — Seasonal/Vacation	8 adults or families of 10
Height	29¼”
Width	27½”
Length	71″
Unit Weight	95 lbs
Shipping Weight	135 lbs
Shipping Carton Dimensions	H 34″ × W 30″ × L 62″ (collection chamber ships in a separate box)
Electricity Required	None — fully non-electric
Built-In Heater	No
Built-In Fan	No
Vent Pipe	4″ thin-wall PVC
Optional Fan	12V (recommended for heavy seasonal or residential use; purchased separately)
Drain	1″ OD — recommended in all applications
Warranty	3 years on parts

FAQs

Q: What makes the CENTREX 3000 NE different from the CENTREX 2000 NE? A: The CENTREX 3000 NE features a continuous-flow drum design not found on any other non-electric Sun-Mar model. As the drum rotates, compost moves forward along a longer, larger drum and drops automatically into a collection housing at the end of the unit — meaning the drum does not need to be reversed for emptying under normal operating conditions. It also offers higher capacity: 5 adults continuously and 8 adults seasonally, versus the CENTREX 2000 NE’s 3 adults continuously and 6 seasonally. It is also the only non-electric Centrex model compatible with an AF waterless toilet in addition to the standard 1-pint flush toilet.

Q: Does the CENTREX 3000 NE require electricity? A: No. The CENTREX 3000 NE has no built-in heating element or fan and requires no electrical connection. Odor control is handled through a 4″ vent stack. An optional 12V fan is recommended for heavy seasonal or residential use and is available as a separate purchase.

Q: What toilets are compatible with the CENTREX 3000 NE? A: The CENTREX 3000 NE is compatible with both an AF waterless toilet and a 1-pint ultra-low flush toilet, both purchased separately. More than one toilet may be installed on the system depending on needs and available space.

Q: Does the collection chamber come in the same box as the main unit? A: No. Due to the unit’s size and configuration, the collection chamber ships in a separate box from the main composting unit.

Q: Is a drain connection required? A: A 1″ OD drain connection is recommended in all applications. All venting must follow the guidelines in the unit’s owner’s manual.

Q: What is the warranty on the CENTREX 3000 NE? A: All Sun-Mar composting toilets carry a 3-year warranty on parts.