| Marsh Ensign 16PE Sewage Treatment Plant | wastewater-supplies.com | 3410 GBP | 4,890 GBP | −23.4% |
| Marsh Car Wash Silt Trap - CST1 | wastewater-supplies.com | 1550 GBP | 1,850 GBP | −16.2% |
| Marsh Ensign 12PE Sewage Treatment Plant | wastewater-supplies.com | 2845 GBP | 3,750 GBP | −15.5% |
| Marsh ENCO 6 Person Domestic Sewage Treatment Plant | wastewater-supplies.com | 1990 GBP | 2,650 GBP | −13.2% |
| Marsh ENCO 10 Person Sewage Treatment Plant | wastewater-supplies.com | 2480 GBP | 2,800 GBP | −11.4% |
| Marsh Ensign 4PE Sewage Treatment Plant | wastewater-supplies.com | 2240 GBP | 2,500 GBP | −10.4% |
| Marsh Ensign 10PE Sewage Treatment Plant | wastewater-supplies.com | 2630 GBP | 3,250 GBP | −8.8% |
| Marsh Ensign Ultra 12PE Sewage Treatment Plant | wastewater-supplies.com | 3750 GBP | 4,079 GBP | −8.1% |
| Marsh Ensign 8PE Sewage Treatment Plant | wastewater-supplies.com | 2450 GBP | 3,000 GBP | −7% |
| Marsh Ensign 6PE Sewage Treatment Plant | wastewater-supplies.com | 2190 GBP | 2,650 GBP | −4.5% |
| Marsh Hydroil Silt traps - CST2 | wastewater-supplies.com | 1780 GBP | 1,850 GBP | −3.8% |
| Marsh ENCO 12 Person Sewage Treatment Plant | wastewater-supplies.com | 2700 GBP | 2,800 GBP | −3.6% |
| Marsh ENCO 8 Person Sewage Treatment Plant | wastewater-supplies.com | 2240 GBP | 2,650 GBP | −3% |
| Marsh Ensign 20PE Sewage Treatment Plant | wastewater-supplies.com | 4895 GBP | 5,200 GBP | −2.1% |
| Marsh Ensign 40PE Sewage Treatment Plant | wastewater-supplies.com | 11990 GBP | 12,500 GBP | −0.1% |
| Marsh Ensign Sewage Treatment Plant - 300 | wastewater-supplies.com | 44500 GBP | 13,200 GBP | — |
| Marsh Ensign Sewage Treatment Plant - 250 | wastewater-supplies.com | 38150 GBP | 13,200 GBP | — |
| Marsh Ensign Sewage Treatment Plant - 200 | wastewater-supplies.com | 31500 GBP | 13,200 GBP | — |
| Marsh Ensign Sewage Treatment Plant - 150 | wastewater-supplies.com | 25800 GBP | 13,200 GBP | — |
| Marsh Hydroid Full retention separator - NSFR300 | wastewater-supplies.com | 25000 GBP | — | — |
| Marsh Hydroid Full retention separator - NSFR275 | wastewater-supplies.com | 24700 GBP | — | — |
| Marsh Hydroid Full retention separator - NSFR250 | wastewater-supplies.com | 23425 GBP | — | — |
| Marsh Ensign Sewage Treatment Plant - 125 | wastewater-supplies.com | 23150 GBP | 13,200 GBP | — |
| Marsh Hydroid Full retention separator - NSFR 210 | wastewater-supplies.com | 20550 GBP | — | — |
| Marsh Hydroid Full retention separator - NSFR200 | wastewater-supplies.com | 19800 GBP | — | — |
| Marsh Hydroid Full retention separator - NSFR175 | wastewater-supplies.com | 18700 GBP | — | — |
| Marsh Ensign Sewage Treatment Plant - 85 | wastewater-supplies.com | 17850 GBP | 13,200 GBP | — |
| Marsh Hydroid Full retention separator - NSFR165 | wastewater-supplies.com | 17500 GBP | — | — |
| Marsh Ensign Sewage Treatment Plant - 70 | wastewater-supplies.com | 16600 GBP | 13,200 GBP | — |
| Marsh 70000 Litre Cesspool / Cesspit Tank (HSC70000) | GRP High-Capacity Sewage Storage | thetankshop.co.uk | 16200 GBP | — | — |
| Marsh 70000 Litre Silage Effluent Tank (HSC70000-S) | GRP Agricultural Runoff Tank | thetankshop.co.uk | 16200 GBP | — | — |
| Marsh Ensign Ultra Sewage Treatment Plant - 50PE | wastewater-supplies.com | 15900 GBP | 4,079 GBP | — |
| Marsh 65000 Litre Silage Effluent Tank (HSC65000-S) | GRP Agricultural Runoff Tank | thetankshop.co.uk | 15540 GBP | — | — |
| Marsh 65000 Litre Cesspool / Cesspit Tank (HSC65000) | GRP High-Capacity Sewage Storage | thetankshop.co.uk | 15000 GBP | — | — |
| Marsh Hydroid Full retention separator - NSFR150 | wastewater-supplies.com | 15000 GBP | — | — |
| Marsh Ensign Ultra Sewage Treatment Plant - 45PE | wastewater-supplies.com | 14800 GBP | 4,079 GBP | — |
| Marsh Ensign:Standard Shallow Sewage Treatment Plant - 35PE | wastewater-supplies.com | 14460 GBP | 2,800 GBP | — |
| Marsh 60000 Litre Silage Effluent Tank (HSC60000-S) | GRP Agricultural Runoff Tank | thetankshop.co.uk | 14400 GBP | — | — |
| Marsh Ensign Ultra 50 Person Sewage Treatment Plant | drainagesuppliesdirect.co.uk | 14345.74 GBP | — | — |
| Marsh Hydroid Full retention separator - NSFR125 | wastewater-supplies.com | 14110 GBP | — | — |