Marsh Ensign 12 Person Sewage Treatment Plant
Product code MARSH-ENSIGN-12
From £2,475.00 Exc VAT (£2,970.00 Inc VAT)
Product Description
The Marsh Ensign 12 Person Sewage Treatment Plant is a robust, low-maintenance package plant for homes and buildings that are not connected to the mains sewer. It is sized for up to 12 people, which suits two or three homes on a shared drain, or a large house with guest rooms.
How the Ensign 12 Person Sewage Treatment Plant works
Inside, there are no moving parts. As a result, installation and commissioning are simple, and long-term servicing costs stay low. A low-energy compressor supplies air to the treatment chamber, so running costs are modest too.
First, sewage enters the primary settlement chamber, where solids settle and break down. Next, the clarified liquid flows into the aeration chamber. Here, bacteria living on mobile media are fed with air, and they remove the dissolved pollutants. Finally, the treated water passes through a settlement chamber and out to a drainage field or watercourse.
Key features
- No internal moving parts, so there is very little to wear out
- Low-energy air compressor, housed internally or externally at no extra cost
- Tested and approved to BS EN 12566-3, with around 97% pollutant removal on published test results
- Polylok filter on the outlet to hold back solids
- Forsheda seal on the inlet for a flexible, easier joint
- Optional risers to suit deeper inlet pipes
Outlet options
Choose a gravity outlet if the treated water can flow downhill to your drainage field or watercourse. If it cannot, the pumped outlet version has a built-in pump chamber that lifts the water to a higher discharge point. The price updates when you pick an option.
Inlet depth and extras
The standard inlet sits 550mm below ground level. If your drain arrives deeper than that, choose a deeper inlet option, and the tank will be supplied with a riser to suit.
For a quieter installation, you can also add the Whisspurr noise reduction unit. It covers the air compressor and cuts the sound it makes, which helps when the plant sits near a house or patio.
Dimensions
- Length: 2860mm
- Width: 1912mm (+/- 50mm)
- Height: 2139mm (+/- 50mm)
- Inlet invert: 550mm, 110mm pipe
- Outlet invert: 625mm, 110mm pipe
Delivery and Returns
Delivery Information
Shipping costs for standard postcodes within UK Mainland are calculated at checkout when a postcode is entered.
Delivery charges are based on current manufacturer and courier rates. In some cases, delivery costs may be subject to confirmation after an order has been placed due to supplier delivery zones or freight changes. If an additional delivery charge applies, the customer will be notified before the order is dispatched and given the option to proceed or cancel the order for a full refund.
Some areas may incur additional charges, including:
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Scottish Highlands and Islands
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Isle of Wight, Channel Islands, Isle of Man, Anglesey, Western Isles, Shetland Islands, Orkney Islands, Isles of Scilly
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Northern Ireland
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Republic of Ireland
Additional charges may apply for postcodes in these areas:
AB, BT, CA, CT, DD, DG, EH, FK, G, GY, IM, IV, JE, KA, KW, KY, LD, LL, ML, PA, PH, PO 30–41, SA, SY, TD, TN, TR, ZE
If your postcode is listed above, please contact us before ordering for a shipping quote.
Some products are only available for delivery within England & Wales; this will be stated on the product page. If you are outside this area, please contact us for a quotation.
Delivery Lead Times
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Refer to individual product pages for expected delivery times.
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Custom orders may take longer; please enquire before ordering.
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Items on the same order may be delivered separately due to stock locations.
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If delivery is delayed, we will notify you via email.
Delivery Method
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All deliveries are kerbside unless stated otherwise.
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For larger items, customer offloading may be required.
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Someone must be available to receive and inspect the goods.
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Goods may be left in a safe place at the customer’s risk; Online Tank Store cannot accept responsibility once goods are left.
Note: By signing for the goods, you confirm that the outer packaging is intact and free from visible damage. Any visible damage must be noted on the delivery paperwork or the delivery refused.
Scheduled delivery times may be accommodated; please add instructions in the Customer Notes section at checkout.
Missing or Faulty Items
If items are missing or arrive damaged:
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Contact us within 48 hours of delivery at [email protected]
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Provide:
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Order number
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Photos of the goods
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Brief description of the issue
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We may require images for the manufacturer to provide replacements.
Delivery Charges & Returns
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Ensure the product is the correct size and suitable for your intended use.
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Standard tanks (no customisation) are returnable but subject to a restocking charge and must be returned in A1 condition. Returns may be expensive due to size and weight; please check before ordering.
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Failed delivery attempts: After one unsuccessful delivery attempt, items will be returned to the depot, and redelivery charges may apply.
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Special or custom tanks are non-returnable. If the wrong product is ordered or the item is no longer required, it cannot be returned, and no refund will be issued.
Returns & Refunds
Our full returns and refund policy can be found by clicking here.
It is important to us that the items you order are correct for your needs however, we understand that situations and requirements can change. It can be costly to return an order so please ensure you are certain of your requirements before you order and that you have read the returns policy above for details.
Custom Tank – An order is considered ‘custom’ when a non-standard configuration or colour is requested. Custom orders are not eligible for return so please ensure the product is what you require before ordering. By purchasing, you are agreeing to the above terms.