Technical zone

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  • About WPL Diamond; installation and key features
  • Technical tables, indicative drawings and kiosks overview
  • Domestic application overview

WPL Diamond Range

BS EN12566-3 2014 approval, UK and European patent granted (below ground) WPL Diamond package wastewater (sewage) treatment range, is designed for properties (domestic and commercial) where mains drainage is unavailable.

The compact WPL Diamond range has the flexibility to be configured to meet for various population sizes. The DMS tank is 1 up to 20 population equivalent (PE) and the DMC tank is 21 up to 55 population equivalent (PE), which can be installed in ‘wet’ or ‘dry’ ground conditions, discharging safely to soakaways or watercourses.

The standard package includes a WPL Diamond tank, WPL kiosk, alarm beacon, blower (housed in a kiosk) and 10 metres air hose. Flexible options mentioned later on this page.

Installation

The robust WPL Diamond package wastewater treatment plant is compact in design, keeping the excavation to a minimum and the installation simple. In some situations, no concrete backfill is needed for the WPL Diamond tank.  The WPL Kiosk can be installed above or below ground dependent on site conditions.

Installation manual

A comprehensive installation manual is always supplied with each WPL Diamond plant, explaining the installation process in detail and should be read thoroughly prior to installation. We recommend this should be undertaken by a qualified and experienced installer of package wastewater treatment plants.

WPL recommends that the installer and all sub-contractors should read the installation manual before commencing the installation to avoid loss of warranty.
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Key features

  • 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, ISO 45001
  • Compact design, minimal excavation
  • Installed in ‘wet’ or ‘dry’ ground conditions
  • Flushest lid to the ground
  • No moving parts within the tank
  • Up to 3 years de-sludge intervals
  • No odour
  • Alarm beacon included
  • Original WPL Diamond, patent granted
  • Robust design, UK manufacture

WPL Diamond DMS - 1 up to 20 PE

Viewing on a mobile or tablet? Download the DMS technical tables here.

Loadings:

Model DMS2 DMS3 DMS4 DMS5
Population range (persons) 1-6 5-11 10-15 14-20
Blower motor size (kw)* single phase rating 0.080 0.090 0.160 0.230
Total power consumption 0.080 0.090 0.160 0.230

*Actual power consumption may vary (dependent on motor efficiency and nature of installation), size stated is the motor size NOT actual power consumption.  Additional Blower options are available on request.

Loadings are based on British Water Code of Practice Flows and Loads 4 (on sizing criteria, treatment capacity for small wastewater treatment systems).

 

Dimensions:

Model Max outside diameter (m) Height to inlet (m) *Inlet invert depth (mm) **Height to outlet (m) Outlet invert depth (mm) Max height/in ground depth (m) Weight empty (kg) Total capacity (ltr)
DMS2 1.74 1.70 630 1.61 720 2.33 155 2270
DMS3 1.96 1.83 760 1.73 860 2.59 192 3030
DMS4 1.99 2.00 780 1.93 850 2.78 210 3975
DMS5 1.99 2.00 780 1.93 850 2.78 210 3975

*Deeper inverts can be accommodated with our range of standard invert extensions.
**Diamond units equipped with an EPC have 32mm MDPE pipe outlet and the outlet invert depth is 300mm for all models.

DMS Indicative technical drawing:

Standard package - WPL Diamond DMS

Standard tank models DMS2, DMS3, DMS4 and DMS5 come supplied with:

  • Tank as specified x1.
  • Tank lid with M10 x 50mm stainless steel hex bolts x2.
  • Weatherproof kiosk x1, comes with a low air pressure alarm beacon and blower inside.
  • 10m of ¾ inch hose with hose clips x2, for the blower.

Kiosk for the WPL Diamond DMS:

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 DMC - 21 up to 55 PE

Viewing on a mobile or tablet? Download the DMC technical tables here.

Loadings:

Model DMC6 DMC7 DMC8 DMC9
Population range (persons) 21-27 28-35 36-45 46-55
Blower motor size (kw)* single phase rating 0.230 0.221 0.221 0.221
Total power consumption 0.460 0.663 0.663 0.663

* Actual power consumption may vary (dependent on motor efficiency and nature of installation), size stated is the motor size NOT actual power consumption. Additional Blower options are available on request.

Loadings are based on British Water Code of Practice Flows and Loads 4 (on sizing criteria, treatment capacity for small wastewater treatment systems).

 

Dimensions:

Model Max outside diameter (m) Height to inlet (m) *Inlet invert depth (mm) **Height to outlet (m) Outlet invert depth (mm) Max height/in ground depth (m) Weight empty (kg) Total capacity (ltr)
DMC6 3.30 2.78 570 2.68 665 3.35 380 9056
DMC7 3.30 2.78 570 2.68 665 3.35 380 9056
DMc8 3.30 3.14 580 3.04 680 3.72 460 15038
DMc9 3.30 3.14 580 3.04 680 3.72 460 15038

*Deeper inverts can be accommodated with our range of standard invert extensions.
**Diamond units equipped with an EPC have 32mm MDPE pipe outlet and the outlet invert depth is 300mm for all models.

 

DMC Indicative technical drawing:

Technical-drawing-of-a-below-ground-WPL-Diamond-DMC-compact-package-sewage-wastewater-treatment-plant-for-off-mains-drainge-serves-1-up-to-55-people.

Standard package - WPL Diamond DMC

Standard tank models DMC6, DMC7, DMC8 and DMC come supplied with:

  • Tank as specified x1.
  • Tank lid with M10 x 50mm, stainless steel hex bolts x2.
  • Weatherproof kiosk x1, comes with a low air pressure alarm beacon and blower inside.
  • 10m of ¾ inch hose with hose clips x2, for the airline from the blower outlet to the tank air diffuser.

 

Kiosk for the WPL Diamond DMC:

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

Domestic applications

In domestic applications the WPL Diamond wastewater treatment plant comes in a range of sizes and can provide wastewater treatment for domestic population equivalents of up to 55 persons, meeting consent standards of 20mg/l Biological Oxygen Demand (BOD), 30 mg/l Suspended Solids (SS) and 20mg/l Ammoniacal Nitrogen (AMM-N).

The WPL Diamond is process performance tested, certified and guaranteed subject to consistent influent conditions and regular plant maintenance as per the manufacturer’s instructions.

If more stringent environmental requirements are specified, please contact us.

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WPL Diamond standard

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  • Fully tested, accredited and certified under European Standard CE EN12566-3 – 2014 approval which allows a CE mark.
  • Meets consent standards of 20mg/l BOD; 30mg/l SS; 20mg/l NH3 as a minimum.
  • Meets current Binding Rules legislation for exemption from a permit to discharge by the Environmental Agency in England (EA).
  • Fully compliant with Part H2 UK building regulations.
  • LABC registered in the UK and Wales.
  • Designed using the British Water Code of Practice Flows and Loads, to ensure the tank is correctly sized.
  • WPL is a member of British Water.
  • The WPL Diamond is UK and European patented. This means that our design is completely unique. Patent number: GB 250337.
  • WPL holds accreditation standards ISO 14001, ISO 9001 and ISO 45001
  • David Trump, Technical Director at WCI

    “I find WPL professional, supportive at the time of the enquiry and post installation. Build quality is not an issue; seamless in communication. May it always continue!”
  • Mark Ennion, MD, Border Water Technologies

    “The customer services & accounts management received from WPL staff is excellent, we have been dealing with WPL for a good number of years and it has always been great, any issues are dealt with straight away and they are by far the best company that we deal with.”
  • Adrian Riggs, Contract Manager for MJ Abbott

    “Diamond always meets the schedule for our installation teams with special builds and deeper inverts, manufactured to order in quick turnaround times.”
  • Peter Stedman, Operations Director for Hutchinson Environmental

    “WPL package treatment plants are very well made, with robust manufacturing and quality processes, which ensure continuous high performance and longevity. The back-up and support from the team is also something you don’t get from many companies. Those qualities give us confidence as an installation and maintenance company - confidence that we can pass on to the site owner.”