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Sun-Mar Compact Composting Toilet

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  • Sun-Mar Compact Composting Toilet

    The Sun-Mar Compact Composting Toilet is ideal for cabanas, cabins, guest houses, light cottage use or any remote place where there is an electrical connection but no plumbing. Completely self contained, the Compact is a simple solution.

    A compost toilet is a great way to save thousands of gallons of water each year and dramatically reduce your foot print on the environment.

    Not only will this unit save you thousands on septic installation and maintenance, you are also helping the environment, saving water, and living green!

    Full Time and Part Time User Capacities


    • Height Width Depth: 28.5" x 21.5" x 33"
    • Depth Required to Remove Drawer: 45"
    • Weight: 50Lbs


    • Max Amps: 2
    • Fan Watts: 35
    • Heater Watts: 200
    • Ave Power Use in Watts: 125 

    Suggested Bulking Material

    Sun-Mar Compact User and Installation Manual

    Compact Composting Toilet User Manual

    Want To Learn More About Compost Toilets?

    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

    Watch The Video!


    Why use a Sun-Mar composting toilet?

    General Benefits:

    • no plumbing
    • no water
    • odor-free
    • inexpensive solution

    Environmental Benefits:

    • no pollution
    • saves water
    • recycles nutrients
    • little or no liquid output

    To install, simply plug into a regular 110V outlet and connect the supplied 2 inch vent stack. Seasonal capacity: 3 adults or families of 4. Residential use: 1 adult or family of 2

  • Free Shipping Promotion:

    Shipping costs for our business are typically around $10 for accessories can range and up to $450 for larger items.  However, for a limited time only, we are offering free shipping on all products to the lower 48 states in the U.S.. No minimum order required!

    If you would like an order shipped to anywhere else in the world, please email us at, and we will gladly work something out with you! reserves the right to cancel this offer at anytime

    Order Confirmation:

    After you place your order, you will receive a confirmation email.  This means that we have received your order in our system.  As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and ready for shipment.  If your item happens to be on backorder, or is otherwise unavailable, we will let you know via email.  Once your item(s) are available for immediate shipment, we will ship the order.

    Order Shipment:

    Your order will ship within the lead time we have posted on the product page.  We will email you tracking information within 24 hours of your order leaving the warehouse.  If you do not receive tracking information from us by 3 days after the lead time posed on the product page has elapsed, feel free to follow up with us at

    Most orders will be shipped by FedEx or UPS. Small items may be delivered by the US Postal Service or by the US Postal Service via FedEx Smartpost or UPS Surepost. Larger items may be delivered via FedEx Ground, FedEx Home Delivery, UPS Ground, or Truck Freight. Items shipping via Truck Freight are clearly marked on our website and catalog. Some special orders may require 2 to 6 weeks depending on the item.

    Some large or heavy items require additional shipping and handling charges due to the bulky nature of these products. If an item requires additional shipping and handling charges we will clearly mark this requirement on our website and in our catalog. In most cases, we charge a "flat" rate to ship these items.

    Free shipping applies to orders totaling over $99 shipped to a final destination within the contiguous 48 states of the United States. Certain items do not qualify for free shipping regardless of order total. Items that do not qualify for free shipping will be clearly marked on our website. reserves the right to cancel this offer at anytime. Delivery to rural or extended areas, special order, & Truck Freight shipments may take extra days to arrive. Please call (888) 467-5447 for details.

    International Orders:

    International Orders (except Canada) require special processing. When you are entering an International Order, please complete all the necessary information. We will get a shipping quote from one of our International shippers. We will contact you with the final charges for approval. The order will not be shipped or charged unless it is confirmed by you. Please note: You will be responsible for any applicable taxes and/or duties that will need to be paid upon delivery.

    Canadian Orders: We do not ship directly to Canada, however, we will ship to a US-based freight forwarder of your choice! We recommend you first contact the desired freight forwarder to obtain their shipping and receiving processes. You will be responsible for all duties and tariffs on Canadian shipments, along with coordinating with the freight forwarder for delivery to final destination. Please call (888) 467-5447 for assistance, otherwise enter the shipping address provided by your US-based freight forwarder.


    ALL SHIPMENT SHOULD BE INSPECTED AT THE TIME OF DELIVERY. DAMAGED PACKAGES SHOULD BE REFUSED. If you notice any damage, you should note it on the freight bill when signing for delivery.  If your product is defective or sustains damage during shipping, please contact us at right away. Remember to keep all the original packaging for any items that need to be returned. All returns need to be authorized by our customer service department prior to being processed.

    If delivered by Truck Freight, please contact the freight carrier at the phone number on the carrier’s bill. After contacting the carrier, please call Customer Service at (888) 467-5447 for further assistance with the damaged shipment. Please note, signing for your delivery without noting any damages or inability to inspect the delivery on the relevant paperwork legally states that you have received your freight in good condition and cannot be held liable for any damages, missing pieces, etc. that may be incurred as a result of this decision. Leaving a note or instructions for the driver is considered to be the same as signing for your products in good condition. If you authorize the freight company to leave freight without a signature, cannot be held liable for any damages, missing pieces, etc. that may be incurred as a result of this decision. If you choose to sign for a visibly damaged please note on the relevant paperwork that you are signing for a damaged package; however, cannot be held liable for any damages or missing pieces for accepted via signature delivery.

    Cancellations & Refunds:

    To cancel an order, reply to the confirmation email you received when you placed your order online. Just tell us why you need to cancel and we will process it as soon as we can.  All orders canceled after 48 hours are subject to a $50 administration fee, regardless of whether your order has shipped.  If you order has shipped, you will also be responsible for return shipping charges. Refunds will be issued to the credit card that you used when placing your order.

    How do I return a product?

    If you want to return an item, please send an email to

    Returns will only be accepted within 30 days of the receipt of your product.  The product must be returned unopened in the original packaging.

    We do not accept returns of used products.  You should also provide us with a receipt of your purchase and a reason for returning the item.

    Please note that you cannot return an item without a valid return authorization number and there is a 30% restocking fee for all returns.  Upon receiving and inspecting the returned product, will issue a refund for the full amount minus restocking/administration fees to the credit card used for the purchase only.

    If you attempt to send the item back without a return authorization number, it will be refused, and you will be charged the return shipping costs.  Customers are responsible for paying all shipping and handling costs for returning an item. 

  • Why Buy From

    We know you have a choice in online shopping, and we want to do all that we can do to earn your business.  We not only want to earn it, but we want to keep it as well!

    Here are the top 7 reasons to buy from

    100% Safe and Secure Online Shopping - Know that every transaction that takes place on our website is 100% secure.  If you'd like to learn more, see our Online Security page.

    Fully Insured Shipments - Every shipment that leaves our warehouses is fully covered in case of a lost item or damage.  Please refer to the Shipping & Returns tab to learn more about our policy.

    Quality - We understand what it can be like to purchase online without actually seeing and touching the product itself.  So we want you to know that all the manufacturers on this site are hand chosen by our owners to ensure you receive a quality product. All items are inspected (twice) before leaving our warehouses so we know that you’ll be happy with the product that arrives at your door.

    Customer Service Is Our Top Priority - Plain and simple, we are here for YOU, the customer. Our goal is to deliver the WOW factor in service. We strive for excellence in customer service and are driven to provide value at all times.  You can expect communication from us immediately after your order is placed, and also when your product ships.  To this day, every order still receives an email from our owner personally thanking you for letting us earn your business.

    Authorized Dealers - is an authorized dealer for every brand that we carry.  You can rest easy knowing you will receive the full manufacturer's warranty with every purchase.

    Volume Discounts - Are you are looking to buy a large quantity of one item?  Send us an email at and we may be able to offer special pricing for larger volume purchases.

    Purchase Orders Accepted - If you are a School, Government Agency or large business that would like to utilize this option, please email us at or call (888) 467-5447 and we will get in contact with you right away. 


  • Can I merge my vent with my plumbing vent?

    No. We realize that this will make your installation easier, but if the toilet is not installed on its own vent, turbulation of the air in the vent will hamper the airflow, and may lead to odors. In addition, vents connected to other devices (such as sinks, etc.) will start to smell of ammonia. The toilet needs to be on its own vent in order to function correctly.

    Do I really need an overflow drain with a non-electric or central flushing system?

    Yes. You will definitely have overflow leachate in both of these situations, even in very limited usage. If a drain is not connected, the overflow could end up in your bathroom, and not down the drain pipe.

    I am not very handy. Can you install the unit for me?

    Although our units are designed for the do-it-yourselfer to install and maintain, there are other options available. Some of our dealers will either install the units themselves for an extra charge which they determine, or they will be able to refer you to someone who can. If your Sun-Mar dealer is not able to provide this service, or there is no dealer near you, a local handyman should have all of the skills necessary to install your unit.

    How many bends can I put in the vent pipe?

    More than 3 90° bends will disrupt airflow. We also do not recommend any horizontal lengths (no matter how short) or downward dips of the pipe. Fasten your pipe to the structure with the supplied brackets to prevent settling.

    I have a waste pipe run close to 20 feet long. Anything extra I should do?

    Yes. Install a cleanout valve at each elbow to allow for removal of any clogging material. Ideally, you should keep the waste run as short as possible. Sun-Mar does not recommend installation of horizontal waste runs over 20 feet, as it can lead to problems with clogging.

    I am installing a Sealand on a 2 hole flange. What should I do?

    Line up the flange with the bottom of the pedestal, and mark 2 extra drill holes that line up with the floor bolts. If you do not want to do this, 4-hole flanges are available from Sun-Mar for a small charge. Buy the special Sealand floor flange with the Sealand for a small extra charge - it saves you the trouble of modifying a universal flange.

    I have a metal roof/obstruction/other. Do I have to terminate the vent above the roofline?

    Yes. If this means putting a couple of 45° bends in to get it around the eave, do so. If the vent terminates under an eave, the air from the vent will downdraft over the property possibly causing a urine smell to occur. Ideally the vent should be installed to 2-3 feet above the peak of the roof to prevent downdraft.

    My bathroom can get below 55° F at night, or any other time. Will this affect composting?

    Yes. If the unit is being used all of the time, you will need to install an additional heat source or leave the heat on to the area where the composter is located. If you are only using it occasionally on weekends during this time, don't worry about it.

    What is the "soft sealant" referred to in the manual?

    Silicone caulking.

    I want to make modifications to the unit. Will this void my warranty?

    Call us at 905-332-1314 before making any modifications to the composter itself. We may be able to offer you suggestions that do not include modifications to the unit. If the modification is cleared with Sun-Mar (directly, not a dealer) it will not void your warranty. We want to work with you to make sure that your unit fits your needs - even if your needs change after the sale.

    Do I need the vent?

    Yes. Absolutely.

    How will I secure the stack if I install it as high as 2-3 feet above the peak of the roof?

    Guide wires. These should be available at your local hardware store, and you may have already used them for other applications.

    Where does the diffuser go?

    On top of the vent stack.

    Wouldn't a wind turbine be better than the open diffuser?

    The diffuser is a deceptively simple device. It actually prevents most rain and snow from entering your stack. While wind turbines would do the same, when there is no wind to turn them they act as a blockage at the top of the stack, and can create urine odor in the bathroom.


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