Sun-Mar Centrex 3000 High Capacity Central Composting Toilet System

The Centrex 3000 High Capacity Central Composting Toilet System is the largest central composting toilet system in the Sun-Mar lineup. Capable of handling a family of 6 full time or up to 9 for part time seasonal use, this system is a real giant in the industry and is perfect for heavy cottage or medium residential use.

When used seasonally by up to 9 adults, compost will normally only need removing annually each spring. In residential use compost will have to be extracted more frequently.

Centrex central composting systems offer all the benefits of modern waste composting systems while keeping the look and feel of a more traditional bathroom.


Sun Mar's Centrex 3000 Continuous Flow Design

The Centrex 3000 utilizes a continuous flow design for very heavy cottage or medium residential use. With a continuous flow system, rotation of the drum moves compost along the larger and longer 3000 series drum, before it drops automatically into the collection housing at the end of the unit. Under normal operating conditions the drum will not have to be turned backwards for emptying.

All Centrex 3000 series units are supplied with a 1" drain hose which should be connected to the 1" drain at the bottom left of the unit.

The Centrex 3000 may be used as a wet or dry system depending on your available hookups and needs.

Sun Mar Centrex 3000 Compatible Toilets for (WET) system

  • Model 510 Plus
  • Model AM Style II



Sun-Mar Centrex 3000 Compatible Toilets for (DRY) system

  • AF Waterless Dry Toilet
  • AF Waterless Elongated Dry Toilet

The Centrex 3000 system is able to support as many toilets as you like. The limitation is how many people use the toilets.

Full Time and Part Time User Capacities for Sun-Mar Centrex 3000



Sun-Mar Centrex 3000 Toilet Dimensions

  • Height & Depth & Width: 30.25" x 27.5" x 71" by 27"
  • Weight: 102lbs
  • Depth required for Drawer Removal: 45.5"

Sun-Mar Centrex 3000 Electrical Specs

  • Max Amps: 3.6
  • Fan Watts: 35
  • Heater Watts: 370
  • Avg Power Usage in Watts: 215



What's Included in your Sun-Mar Centrex 3000 order

  • Centrex 3000 Unit 
  • Owner's Manual
  • Warranty Card
  • Rake
  • 2" ABS Vent Pipe 30"L(Qty:6)
  • 4" Diffusor
  • Hardware Kit
  • 1" Flexible Drain Hose (8' Long)
  • Compost Sure Blue (2 Bag)
  • Not included**: 3" plumbing pipe and fittings needed to connect a 1 pint flush toilet to a central composting unit.

Sun-Mar Centrex 3000 Optional Upgrades

  • Toilet AF Waterless or AF Elongated Waterless 
  • Toilet AF Waterless or AF Elongated Waterless & Compost Sure Blue (Case of 5)
  • Toilet Model 510 or AM Style II
  • Toilet Model 510 or AM Style II & Compost Sure Blue (Case of 5)

Sun-Mar Centrex 3000 Toilet System User and Installation Manual



Watch Sunmar Centrex 3000 Video!

Be sure to check out our book! Just released, The Ultimate Composting Toilet Guide - Everything You Need to Know About Composting Toilets.

The Ultimate Composting Toilet Guide


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