Sewage Treatment Plants Parts


Tricel UK carries a range of wastewater treatment plants, septic tank parts, and accessories to work with the Tricel Vento septic tank and Tricel Novo sewage treatment plant.

We offer different types of accessories or spare parts for our wastewater treatment solutions.

  • Distributions boxes
  • Turret risers
  • Spare lids and covers

See below for more information on each.

Contact us to book a service for your Tricel wastewater treatment solution. We will refer you to one of our installers/maintenance companies.

+44 (0)1934 422 311

If you have any questions, feel free to call us or use our quote form

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Distributions boxes for septic tanks and wastewater treatment plants

Distribution boxes help distribute pre-treated effluent evenly into drainage trenches or soakaways. Our distribution boxes are gravity fed. They connect to a septic tank or wastewater treatment plant and spread the pre-treated effluent to the drainage fields/soakaways.

Turret risers

Risers are available and used for deeper installations. When a septic tank or wastewater treatment plants have to be installed at a deeper depth, risers are available to provide access for desludging and maintaining the systems in place and to ensure that the lids are not sat below the ground surface level.

They are easy to install (see below for more information) and give the flexibility to adapt to the site requirements and deep excavations.

The Tricel Vento septic tanks undergo production using advanced blow moulding technology, utilizing high density polyethylene as the primary material. Renowned in the market, this exceptional product boasts remarkable durability, featuring a desirable blend of superior strength and lightweight properties. As a result, it offers effortless installation, making it an ideal choice for various septic tank needs.

Tricel Novo wastewater treatment plants are known for their dependable performance, convenient installation, and straightforward maintenance, catering to a wide range of wastewater needs. These efficient plants can accommodate populations ranging from 1 to 50 PE (Population Equivalent).

The Tricel Novo submerged aeration plant is specifically designed for domestic, light commercial, or communal applications. It utilizes a tried-and-tested fixed bed technology, ensuring optimal functionality. Each system consists of three distinct treatment zones, each fulfilling a specific stage of the purification process.

Tricel Vento risers

Tricel Vento without risers
Tricel Vento with risers
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Manhole risers are available for deeper installation requirements. They are available in 180mm increments x 400mm diameter to a maximum height of 540mm (max 3 risers). All maintenance hole lids are securable and must be secured for safety and to prevent unauthorised access. All maintenance work is done through these manholes. Please refer to the manual (section 7) for more information about the risers and their installations.

Please note that 2 risers are required for each septic tank.

Distribution box risers are also available.
They increase the height of the distribution box by 225mm.
A maximum of 3 risers is permitted with every distribution box.

Tricel Novo risers for deep installation

Tricel offers three different manhole riser heights to suit different invert/inlet levels. Maintenance hole risers allow for the positioning of the treatment plants at the optimum depth for each installation. Wastewater is gravity fed from the home to your treatment plant.

The inlet pipe’s position from the premises determines the excavation depth for the wastewater treatment plant. Tricel offers a choice of manhole risers 250mm/500mm/750mm to help with installation where site conditions require a flexible solution.

Please note that the Novo has a 250mm riser piece, 110mm pipe, clear braided hose, assorted bolts and hose clips.

The quantity of risers required varies according to which Tricel Novo UK model you have and the number of turrets that need extending. For example, a Tricel UK6 has x1 turret. It will require only x1 riser, whereas a Tricel UK50 has x7 turrets and will therefore require x7 riser.

For more information about the installation of the risers, please refer to the Tricel Novo Manual (5.9 “Risers”).

Tricel Novo Riser 250mm
Tricel Novo Riser 500mm
Tricel Novo Riser 750mm
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The main reason for a riser to be used is when the waste pipe from the dwelling is lower than the inlet on the Novo wastewater treatment plant, which is at 535mm. The installer can lower by an additional 750mm on top of the 535mm.
Manhole risers are available to facilitate this and to avoid the access hatch being positioned in a depression, as shown in the diagram.
NOTE: All installation work is to be carried out by a trained, competent person. We recommend you also download and read the manual.
Caution: Always isolate electricity before commencing any installation


1) to prevent surface water from entering the tank and overloading the system, as this can inhibit the growth of the bacteria and could reduce the effluent quality.
2) to prevent water from entering the blower housing, which can harm the control panel and the air blower.

Why risers are important:

If you don’t use turrets when you are supposed to, see below what can happen to your installation. Always work with a professional builder.

Steps to follow:

  1. Take off the desludging cover.
  2. Apply a bead of silicone around the insides of both sides of the joiner to seal.
  3. Put the joiner on the pipe already in place.
  4. Put extension in place.
  5. Apply another silicone bead to the joiner outside to ensure a watertight seal.
  6. Place the desludging cover onto the pipe as before.


See below the steps to follow:

1. Take off the access cover. Disconnect any electrics or pipework if necessary.
2. Apply a bead of silicone around the inside curved flange edge of the first riser.
3. Place the riser flange down on the turret.
4. Secure the riser using 8 M6 x 25mm tech screws. Insert the screw at a 90-degree angle.


Where more than a 250mm rise is required:

5. Apply a bead of silicone all around the top edge of the riser.

6. Place another 250mm riser on top of the first riser.

7. Repeat steps 5 and 6 for a 750mm rise.

8. Secure the riser using 8 M6 x 25 tech screws. Insert screws at a 45-degree angle.

9. Apply a silicone bead on the riser inside to the riser joint. Make sure an excellent watertight seal is achieved.

10. Place the access cover back in position and reconnect any electrics.

11. Secure access in position using an M12 bolt.

Each lid should be secured at all times to prevent unauthorised access. Tanks are supplied with two connecting points, as shown below.

To secure the lid, rotate it until tight. Tighten the screw in place with a screwdriver. The cover is now secured in place.

Spare lids and covers

Because accidents can happen, and the lid or covers of your wastewater treatment plant or septic tank might get damaged and needs replacing.

Please see below the replacement parts, lids and covers for Tricel Novo and Tricel Vento.

  • Access lid for Vento 6, 12, 20 (same lid for all tanks)
  • Access lid/cover for Novo UK (will vary depending on the Novo models)
  • Blower housing lid for Novo UK (same for all the Novo models)
  • Desludge lid for Novo UK (same for all the Novo models)
  • Mamway risers 250mm, 500mm or 750mm


For all other maintenance and repairs, we advise you to book a service, and we will refer you to one of our installers/maintenance companies.

We also advise regular maintenance and desludging of your sewage systems to ensure a longer life span of your sewage treatment system.


Ask for a free quote today by clicking the link below


Learn more about Tricel Products

key features



Unrivalled technical expertise by our sales team regarding wastewater treatment solutions



UK-wide network of recommended installers for your peace of mind

Fast delivery


Fast delivery and rapid response to all of our customers

tricel product range

Tricel septic tanks uk

Tricel Vento Septic Tank

Shallow dig tank, strong & robust underground tank, No electrical or moving parts. Ideal for sites with good drainage & plenty of space.

Learn more

Tricel Novo Sewage Treatment Plant

Durable & long lasting SMC tank, shallow dig tank, easy installation (Plug and Play), long life components.

Learn more

Tricel Maxus Sewage treatment Plant

Commercial plant. Submerged Aerated Filter (SAF) technology. Ideal for every project over 50 Population Equivalent.

Learn more
Tricel Packaged Filter System Puraflo

Tricel Puraflo Packaged filter

Ideal for sensitive sites, compliant to British Standard, small footprint.

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Tricel Packaged Pumping Solutions

Tricel Pumping Stations

Pump fluids from one place to another where gravity drainage cannot be used, easy and trouble-free installation

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A highly successful multinational corporation with over 50 years’ valuable industry experience


Plants available for all capacities, from 1PE up to 50PE. Free advice on request.


On-time delivery is a core requirement of our successful business operations

Frequently Asked Questions

A sewage treatment plant is where domestic wastewater and sewage are treated. The sewage treatment plants break down organic matter through the primary settlement and aeration chambers. Sewage treatment plants require little maintenance and have low running costs, and sewage effluent is discharged into drainage fields or watercourses.

You may be able to discharge directly into a watercourse or to a percolation area depending on your region. Find out which option is best for you by contacting your local council.

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