Muffin Monster Sewage Grinder pump and GRP Enclosure

Round Below Ground, Sewage Below Ground, Sewage

Custom Delivery Required

Delivery price on application.

Request a quote


Pump Station Commissioning

Full system inspection

Levels inspection

Manway check for obstruction

Mount control panel (if not in place)

Check correct load to panel

Check correct cable size

Check correct power supply

Set the overloads

Lower pumps via guiderail onto stools using an A-frame if required

Pull pump cables through ducting

Pull float cables through ducting

Set floats to correct operating position

Wire cables into control panel

Fill system with water

Full test of pump station

Sign-off and certification

Warranty and documentation provided

Product Description

Muffin Monster Sewage Grinder pump pre-assembled in a GRP Chamber

Designed to protect pumps and other equipment with its dual-shafted, slow speed and high torque, the grinder pump will shred tough solids that typically cause problems in the wastewater treatment process system. The Muffin Monster comes complete with Wipes Ready technology, which prevents materials from forming long strips and reweaving in the waster stream. Compact and efficient design, when space is at a premium, as it can fit into areas with limited space while still providing the necessary power for downstream protection. 



  • Pump Stations
  • Collection Systems
  • Head works at Wastewater Treatment
  • Private facility discharge to municipal sewer system
  • Industrial Wet Waste grinding and maceration


  • Open Channel Configuration
  • Cutter chamber opening height of 185 mm
  • Hardened allow steel cutters (standard), 120 mm diameter
  • Ductile iron housing
  • Hardened alloy steel shafts, 50 mm hex
  • Mechanical seals with tungsten carbide faces, 6 bar working pressure
  • Available with channel or wall mounted frame for easy installation



  • Flow rates up to 41,4 m3/hr
  • Low Operating costs - shorter pump run cycles and lower electrical cost
  • Automated monitoring and controls
  • Autoload sensing and reversals reduce interrupts and optimize performance
  • Frame options available, i.e. Channel frames, wall frames, guide rails - Please ask if this is required
  • 1,5 kW gear motor standard with a 2,2 kW gear motor optional
  • Optional explosion proof and immersible electric motor
  • 25:1 reducer, cycloidal design
  • Muffin Monster controller - ensures maximum grinding ability with minimum stoppage

Muffin Monster Grinder Cutters

 Tooth Count  Thickness  Material
 7 - Tooth  11 mm  Hardened Alloy Steel
 11 - Tooth  8 mm  Hardened Alloy Steel
 17 - Tooth Wipes Ready  11 mm  Hardened Alloy Steel


Replacement parts

Instead of replacing a worn grinder, there is the ability to buy a Monster Renew Unit instead. Sulzer provide a new factory-built grinder cartridge to replace the worn grinder cartridge, which minimizes the operational downtime. Comes with a full factory warranty.

For more information regarding the Muffin Monster, please give our team a call on 01643 703358



All our Muffin Monsters are for delivery by customer offload. This entails the customer to acquire the right manpower and/or machinery to help unload the tank/s from the delivery vehicle.


Product Details

  • Product Code: DPT
  • Shape: Round
  • Tank Use: Below Ground, Sewage


Our shipping costs cover most of the UK - however, parts of England, Scottish Highlands and Islands including areas north of the Glasgow / Edinburgh border, Isle of Wight, Channel Islands, Isle of Man, Anglesey, Western Isles, Shetland Islands, Orkney Islands, Isles of Scilly, Northern Ireland and the Republic of Ireland may cost more.

Please call before ordering if the delivery postcode is listed below. There may be additional shipping costs. AB, BT, CA, CT, DD, DG, EH, FK, G, GY, IM, IV, JE, KA, KW, KY, LD, LL, ML, PA, PH, PO 30-41 (Isle of Wight), SA, SY, TD, TN, TR, ZE Southern Ireland

Our lead times should only be used as a guide and are subject to change.


Unless a hi-ab delivery has been booked at additional cost, it is the customer's responsibility to offload with suitable equipment on the day of delivery and a failed delivery may result in additional charges.

We recommend installers and/or plant hire & materials to install such as excavators, aggregates etc are not booked until you are in receipt of the goods. Tanks Direct cannot be held responsible for costs incurred due to unforeseen delays, please see our terms for more details.


HIAB delivery will be required if you need the tank offloaded from the delivery vehicle. The driver will unload the tank from the vehicle to ground level, however this service is not to place the tank in situ, this will need to be arranged separately.

If you have any questions regarding your delivery, please contact the Sales Team on 01643 703358.

Returns Information

Please note - Certain items may not be returnable, for example those made to order or for sanitary reasons. Please check the product page for more information.

Customers may return items within 14 calendar days (as per our Terms & Conditions) - refer to section 7. **

All Items must be returned unused, refunds cannot be issued for used or previously installed items.

Please be aware that returning a tank can be complicated and expensive, so please check that you are ordering the correct item (we suggest checking the dimensions very carefully).

If you wish to return goods, please complete the form on this page to provide further information.

Once your request is approved, a valid Returns Authorisation Number (RAN) will be issued to initiate the returns process along with information on how & where to return your order along with any costs involved.

Please DO NOT return any goods without this authorisation. Goods cannot be accepted without this.

Returns are not accepted at our Minehead Office, please wait until we contact you before returning any goods.

View Tanks Direct's return policy now.

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