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The Marsh Euro:Septic 3800 Litre Septic Tank is a robust and reliable choice for properties not connected to the main sewer network. Designed specifically for basic treatment of domestic wastewater, this high-performance system is perfectly sized for small to medium homes (up to 5 bedrooms).
Marsh Euro 3800 Litre Septic Tank Drawing
Marsh Industries Installation Instructions
Part of the trusted Marsh Euro:Septic range, the 3800L model provides a certified, cost-effective, and long-lasting sewage management solution.
| Feature | SEO Keyword Focus | Customer Benefit |
| 12 Person Capacity (5 PE) | 12 Person Septic Tank, 5 Bedroom Home |
Compliant sizing for UK domestic properties, typically handling wastewater from up to 12 users. |
| Integrated Polylok Filter | Septic Tank with Polylok Filter, Effluent Filter |
Extends the life of your drainage field by preventing suspended solids from causing expensive blockages. |
| Durable GRP Construction | GRP Septic Tank, Glass Reinforced Plastic |
Manufactured with a heavy-duty, corrosion-proof shell for longevity and secure installation in various ground conditions. |
| 3800 Litre Volume | 3800 Litre Septic Tank |
Provides sufficient retention volume for settlement and treatment as required by building regulations. |
| CE Marked & Certified | EN12566-1 Compliant |
Meets all relevant UK/EU quality standards (BS EN 12566-1 Annex B), ensuring trouble-free installation and sign-off. |
| Onion-Shaped Design | Onion Septic Tank |
Traditional and proven design that maximises settlement efficiency within a compact footprint. |
A common cause of septic system failure is the contamination and blocking of the drainage field (or soakaway). The Marsh Euro:Septic 3800L eliminates this risk by integrating the highly efficient Polylok effluent filter into the outlet.
This crucial component filters out fine particles and suspended solids from the treated wastewater before it leaves the tank. This increased filtration efficiency (up to 99.63% hydraulic efficiency confirmed by independent testing) significantly extends the lifespan of your soakaway system, saving you from costly repairs and regulatory issues down the line.
The Marsh Euro:Septic 3800L is a high-quality product engineered for simple installation and long-term use.
| Specification Detail | Value |
| Capacity | 3800 Litres (approx. 835 Gallons) |
| Population Equivalent (PE) | 12 |
| Material | Glass Reinforced Plastic (GRP) |
| Diameter | 2075 mm |
| Height | 3000 mm |
| Inlet Invert | 1000 mm |
| Outlet Invert | 1040 mm |
| Pipework Diameter | 110 mm |
| Testing Standard | BS EN 12566-1 Annex B |
| Cover Type | Pedestrian (Standard) |
This 3800L GRP septic tank is the perfect solution for:
New Builds requiring a compliant off-mains system for up to 5 bedrooms.
Property Renovations where an old septic tank needs replacing.
Rural Homes that require a certified, efficient wastewater solution for a 12-person occupancy.
Sites with challenging ground conditions due to the heavy-duty reinforced shell.
We also include integral lifting eyes on the Marsh tank to assist with easier on-site handling and installation.
Need help sizing your tank? Contact our experts for free advice on BS EN 12566 compliance for your property.
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