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WPL Diamond DMS Sewage Treatment Plant

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£2,130.00 Incl. VAT
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WPL Diamond small package wastewater treatment plant is suitable for domestic and commercial properties in all ground conditions where mains drainage is unavailable. Designed not only to give you the highest quality product on the market, but also to provide you with a discreet, efficient and cost-effective solution for the longevity of the plant.

WPL Diamond is better designed for modern day living than a septic tank system; with a faster process and a more environmentally friendly end result, it is the ideal replacement solution. No need for chemicals, allowing final effluent to be safely discharged to a soakaway or watercourse.

This is a small and compact wastewater treatment plant designed for properties that house 1 person or up to 20 (people) occupancy equivalent; ideal for new builds and replacement of existing septic tank systems and package sewage treatment plants.

The kiosk with a small footprint and lid opening, comes complete with alarm mounted beacon and reliable blowers as standard. Additional blower options available on request.

The WPL Kiosk can be installed above or below ground dependent on-site conditions.

WPL Diamond DMS Features

  • 25 years warranty
  • Up to 3 years de-sludge intervals
  • Compact design, minimal excavation
  • Installed in ‘wet’ or ‘dry’ ground conditions
  • Flushest lid to the ground
  • No moving parts within the tank
  • No odour
  • Alarm beacon included
  • Original WPL Diamond, patent granted
  • Robust design, UK manufactured
  • CE mark, EN12566-3 approval
  • Effluent standard; as a minimum: 20mg/l BOD; 30mg/l SS; 20mg/l NH3
  • Load tested and water tight
  • Tank sizes to meet individual requirements
  • Part H2 UK building regs compliant
  • LABC registered
  • Meets General Binding rules
  • Designed using British Water Code of practice flows & Loads
  • ISO 14001, ISO 9001, OHSAS 18001


Product Type Sewage Treatment Plant Capacity 7-12 Person
13-24 Person
1-6 Person
Code DMS2
Population 6 Person
11 Person
15 Person
20 Person
Invert 630mm
Domestic Or Commercial Commercial
Gravity Or Pumped Gravity Install Type Standard

Questions & Answers


Is ground condition important for the discharge in a domestic situation


Yes, ground conditions can impact this, if you are doing a drainage field you are best off talking with a grounds worker who can complete a percolation test.


If the lid is taken off, will that be sufficient for a sample to be taken?


The tank itself can not be used for samples, you will need the WPL sample chamber or if you have the WPL pump chamber this can be used.


I am considering installing a WPL Diamond DMS2 unit to replace a damaged septic tank in a holiday home. I have the necessary permissions etc. - but would like to check that the plant is appropriate for use in a situation where it will not be in use full-time. The blower can be left running ok, but is it a problem that there might be period of, say, 3-4 weeks when the house is unoccupied?


WPL Diamond tanks are able to function at 1% capacity so this wont be an issue.

Have a question about this product?


5 / 5 3 reviews
Reviewing WPL Diamond DMS2 Sewage Treatment Plant - 1-6 Person Tank
4th November 2020
Economical solution to improve waste treatment. Delivered on time. No complaints.
Jacqueline Smith
Reviewing WPL Diamond DMS5 Sewage Treatment Plant - 14-20 Person Tank
18th June 2020
Very good
helen emmett
Reviewing WPL Diamond DMS2 Sewage Treatment Plant - 1-6 Person Tank
10th April 2020
Quality product !
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WPL Diamond DMS Sewage Treatment Plant

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