Kwerk GmbH - Your Reliable Partner for Customized Solutions

As a renowned provider in the field of assortments, we offer our customers in the chemical, industrial, and process engineering market segments unique solutions. For many years, we have been successfully operating worldwide, emphasizing close collaboration and trust with our customers.

Our secret to success lies in our philosophy, which is based on personal contact and individual support. Each customer is assigned a dedicated contact person who ensures smooth coordination and daily communication. This proven practice enables companies of various industries and sizes to benefit from the diverse services provided by our dedicated team.

Discover our comprehensive services and let our highly qualified team support you, whether you are a regional craftsman or an internationally operating industrial company. At Kwerk GmbH, you can get everything under one roof!

Contact us today and find out how we can assist you with your specific requirements. We look forward to collaborating with you and developing tailor-made solutions.

Reliable plastic piping systems for the highest demands.

Welcome to Kwerk GmbH- Your Specialist for Plastic Piping Systems. Discover our high-quality plastic piping systems, including ABS, PVC-U, PVC-C, transparent PVC-U pipes, PP, PP-GF, PE, and PVDF. We offer a comprehensive range of pipes, fittings, and valves from renowned manufacturers such as DURAPIPE/ENGLAND.

Our ABS piping systems are particularly suitable for refrigeration and compressed air technology. Learn more about the ABS material and its optimal applications. PVC-U pipes and fittings in pressure ratings PN 10 and PN 16 are also available. Take advantage of our technical information, videos, and tools for processing and flow calculations.

PVC-C stands out for its high temperature resistance and resistance to acids and alkalis. Explore our PVC-C piping systems and learn all about their properties.

We offer transparent PVC-U pipes in various dimensions, available in metric and inch sizes. Our PP piping systems include PP pipes, fittings, and valves for various applications. PP-R piping systems are ideal for cold and hot water installations. In the PP-GF section, you will find glass fiber reinforced plastics and special valves complying with ATEX.

PE pipes are ideal for drinking water supply, wastewater technology, and buried gas pipelines. Discover the variety of material qualities available. PVDF piping systems provide excellent mechanical, physical, and chemical properties for industrial applications.

Efficient ventilation components for optimal air quality

At, you will find a diverse selection of ventilation components made of PVC-U, PPs, PPs-EL, PP-H, PE-HD, and PVDF in various designs and dimensions. Our high-quality plastic ventilation components are used in numerous industries, including the chemical industry, electroplating industry, paper and food industry, as well as laboratory facilities.

Reliable plastic containers for versatile applications offers a wide range of plastic industrial containers, including dosing tanks and chemical tanks. We not only manufacture these containers from standard PE, but also from high-quality sheet material. Our range includes PE dosing tanks with a capacity of 35 to 1000 liters, PE overflow tanks, salt dissolution tanks from 60 to 5000 liters, as well as storage tanks, tubs, and space-saving tanks.

Filter solutions for clean and clear water

In the field of filtration technology, we are your reliable partner. We offer high-quality Pentek filter cartridges, Pentek filter housings, and Pentek filter bags for water treatment, sourced from a renowned manufacturer in the USA. Our extensive range includes a wide selection of filter housings for various applications in chemical and process engineering.

We provide filter inserts for all common makes and applications, available for direct delivery from stock. Whether it involves complex processes or high dirt loads, we have the right solution for you. Particularly noteworthy are our strainers in single and double design, specifically developed for wastewater technology.

We are your competent partner in measurement and control technology, representing renowned manufacturers in this field. With over 11,000 products, we offer you a comprehensive selection of automated plastic valves.

Precise measurement and control technology for smooth processes

Our range includes electric and pneumatic plastic ball valves in various materials and designs. These valves enable precise control and regulation in your plants. Furthermore, we offer a variety of level, pressure, and temperature sensors that are indispensable in plant and apparatus construction.

For efficient flow measurement, we provide float flow meters that ensure accurate volumetric flow measurement. Additionally, our flow meter configurator allows you to customize your individual flow meter.

Powerful plastic pumps - Reliability in every application

Chemical pumps for the chemical and process engineering industries, in addition to corrosion-resistant plastic piping systems, are essential components in industry, chemistry, and process engineering. Depending on the application, these products require intensive application consultation. Our team is ready to assist you in this regard.

Customized plastic solutions - Your vision, our implementation

Our plastic fabrication workshop and plastic apparatus construction play a crucial role in our customer service. As an important partner, we specialize in individual custom valves and tailor-made plastic fabrications.

In our workshop, we use a plate milling machine to produce flanges, blanks, and blind flanges up to a diameter of 1500 mm. We also manufacture fittings for pH value, redox potential, and temperature measurement. Our expertise also includes CNC turning and milling of plastic parts. One example of our products is our high-quality static mixer made of plastic.

Your partner for individual consultation and implementation

In addition to our extensive product range, we also offer customized consulting to seamlessly meet your engineering requirements. At, we place great importance on quality, both in our products and in delivery and performance, all at a competitive price.

We have gained the trust of 35 manufacturers and suppliers from Germany and abroad to professionally distribute their products online.

We look forward to a successful collaboration and are available to answer any further questions. Simply reach out to us, and we will be happy to assist you.

Experience the Depth and Breadth of Our Product Ranges

ABS piping systems
ABS pipes
ABS glue fittings
ABS adaptor fittings
ABS threaded fittings
ABS ball valve and valves

PVC U piping systems
PVC U pipes
PVC U glue fittings
PVC U adaptor fittings
PVC U threaded fittings

PVC U transparent piping systems
PVC U transparent pipes in MM dimensions
PVC U transparent pipes in INCH dimensions
PVC U transparent fittings in MM dimensions
PVC U transparent fittings in INCH dimensions

PVC C piping system
PVC C pipes
PVC C glue fittings
PVC C adaptor fittings
PVC C threaded fittings
PVC C ball valve and valves

PP-H piping systems
PP pipes
PP fittings
PP ball valve and valves

PP-GF piping systems
PP-GF ball valve and valves

PP-R piping systems
PP-R pipes
PP-R fittings
PP-R ball valve and valves

PE piping systems
PE pipes
PE fittings

Metallic piping systems
Diaphragm valves made of GG cast iron and stainless steel
Pipe couplings made of stainless steel
Pipe couplings made of GGG cast iron
Flange adapters made of GGG cast iron
Dismanteling Joints

  PVDF piping systems
PVDF pipes
PVDF fittings
PVDF ball valve and valves

Chemiedur - pipe
UP-GF (FRP) piping systems
UP-GF (FRP) pipes
UP-GF (FRP) fittings
UP-GF (FRP) stube flange
UP-GF (FRP) loose flanges

UP-GF (FRP) Liner - lining material
UP-GF (GFK) Liner pipes
UP-GF (FRP) pipes-Liner PVDF
UP-GF (FRP) pipes -Liner PP
UP-GF (FRP) pipes -Liner-HDPE
UP-GF (FRP) pipes -Liner PVCU
UP-GF (FRP) pipes -Liner PVCC

UP-GF (FRP) Liner fittings
UP-GF (FRP) fittings Liner PVDF
UP-GF (FRP) fittings Liner PP
UP-GF (FRP) fittings Liner HDPE
UP-GF (FRP) fittings Liner PVCU
UP-GF (FRP) fittings Liner PVCC

Ventilation technology
Pipes made of PPs, PP, PE, PE-El
Fittings formed ventilation parts
Valves - formed ventilation parts
Flexible connectors
Sound attenuators
Outlet cowl
Supply and return air grilles - formed ventilation parts
Roof head - formed ventilation parts
Bird protection grid - formed ventilation parts
Accessories - formed ventilation parts
Plastic fans

Chemical containers
Dosing tank 35-1000 liters
Outer containers for dosing tanks
Salt dissolving tanks up to 5000 liters
PE Container with lid up to 5000 liters
PE Container without lid up to 5000 liters
PE storage tanks up to 5000 liters
PE space saving tanks up to 2000 liters
PE /PP collecting trays
Accessories IBC tanks/containers
IBC adpaters

Filter cartridges and filter housings
Filter housings
Filter bags
Filter cartridges and inserts
Limescale protection
Strainers made of  PVCU, PVC C und PP
Pot  strainer DN 300
Angle seat strainer DN 500
Filter presses / Laboratory filter presses
Scraper made of  PE for filter press

Flow meters
Variable area flow meters
Configuration tool for flow meters

Automatic valves PVC U
PVC U electrical ball valve
PVC U pneumatic ball valve
PVC U diaphragm valve
PVC U solenoid valves

Automatic valves PVC C
PVC C electrical ball valve
PVC C pneumatic ball valve
PVC C diaphragm valve

Automatic valves ABS
ABS electrical ball valve
ABS pneumatic ball valve
ABS diaphragm valve

Automatic valves PP
PP electrical ball valve
PP pneumatic ball valve
PP diaphragm valve

Automatic valves PVDF
PVDF electrical ball valve
PVDF pneumatic ball valve

Automatic valves PTFE
PTFE magnetic valves

  Pressure relief valves
PVC U pressure relief valves
PP pressure relief valves
PVDF pressure relief valves
PTFE pressure relief valves
Stainless steel pressure relief valves

Pressure reducing valves
PVC U pressure reducing valves
PP pressure reducing valves
PVDF pressure reducing valves

Custom-made products out of plastic
Semi-finished plastic parts
Snaplock coupling
Sample taking device made of plastic
Special plastic fittings
Static mixer made of plastic
CNC – turning parts made pf plastic
TRI clamps made of PP and PVDF
Electrically conductive screw connections
Vacuum breaker for pipes and tanks

Chemiedur - parts
GFK grids

Chemical pumps
Diaphragm pumps
Drum pumps
Centrifugal pumps
Water jet pump

Kwerk ATEXLine
ATEX Manual valves
ATEX Containers-and-attachments
ATEX CNC-molded-parts
ATEX IBC-tank-accessories
ATEX Ventilation
ATEX Pumps
ATEX Pipe-Hose-systems


Small plants
MINI-neutralisation plant

Optimize your shopping experience with our detailed delivery information

Plastic pipe systems

Overview of plastic pipe systems
Technical information on ABS pipe systems
Technical information on PVC  U pipe systems
Technical information on PVC  U transparent pipe systems
Technical information on PVC  C pipe systems
Technical information on PP pipe systems
Technical information on PP-R pipe systems
Technical information on PE pipe systems
Technical information on PVDF pipe systems

Chemiedur - pipe

Technical information on UP-GF (FRP) pipe systems
UP-GF (FRP) pipes
UP-GF (FRP) molded parts and connection
UP-GF-PP (FRP) molded parts and connection
UP-GF (FRP) adhesive collars
UP-GF (FRP) loose flanges
Pot Strainer DN 200 - DN 500 Inliner PP/FRP Coated
Pot Strainer DN 200 - DN 500 Inliner FRP/CBL Coated
Angle Seat Strainer DN 200 - DN 400 Inliner FRP/CBL Coated
Manhole mad of FRP and PP/FRP

Plastic pipes

Calculator for cutting pipes
Guidelines for sawing plastic pipe
Leftovers in plastic pipe
Standardization of plastic pipes and molded parts
PVC U pipes deviations
Pressure loss in pipe systems out of PVC U, PVC C and ABS pipe systems
Distinction between Rp, R and G threads
Screw lengths for flange connections

Plastic fittings

PVC U transparent ball valves
Diaphragm valves
Block valves
Butterfly valves
Plastic needle valves


Plastic Valves according to ATEX

New EU guideline 2014/34/EU
Plastic Valves in EX zones
Y-Strainers PP-EL DN 15 - DN 50
Check valves PP-EL DN 15 - DN 50
Angle seat valves PP-EL DN 15 - DN 50

Bonding of plastic pipes

Bonding manual
Video showing the bonding of pipes

Plastic welding

Guidelines for extrusion welding

Grids / support grids

GFK grids
Grids out of PP -el electrically conductive
Profile support grids out of PP -el electrically conductive

Molded ventilation parts

Ventilation technology

Chemical hose

PVC transparent hose with fabric inlay

Industrial tanks and chemical containers

Dosing tanks and outer containers 35 – 1000 Liter
Salt dissolving tanks 60 -5000 Liter
Storage tanks and vats
Storage tanks for water
Safety and collecting troughs
Industrial tank delivery program
Dosing tanks with agitator
Dosing tank agitators
Dosing tanks with attachments
Dosing tanks made of sheet material
Customized chemical containers
Dosing tanks with level indicators



IBC screw caps DN 150/DN 200
IBC adapters out of PE
IBC adapters out of PP

Attachment parts for tank construction

Vapor separators
CO2 - absorbes
Revision nozzles
Block flange

Filter housings and filter cartridges

PENTEK 3G Slime Line filter housings
PENTEK 3G Standard filter housings
PENTEK Big Blue filter housings
PENTEK PP high temperature filter housings
PENTEK PP all nature filter housings
PENTEK filter bags for Big Blue filter housings
PENTEK surface filter cartridges
PENTEK filter cartridges for depth filtration
PENTEK filter cartridges with activated carbon
CINTROPUR filter systems
CINTROPUR water filters

Flange configurator

Blind flanges, loose flanges,  rectangular flanges

Chemical resistance

Table of chemical resistance for plastic pipe systems

Machined plastic parts

Screw-in parts
Threaded fittings
Screw fittings

Milled plastic parts

Loose flanges and blind flanges made of sheet material

Static mixers

Static mixers made of plastic


Single-type and double-type strainers
Pot strainer DN 300
Angle seat strainer DN 500

Flow meters

Variable area flow meters
Configuration tool for flow meters

Filter presses

Laboratory filter presses

Injection molded parts

Scraper made of PE for filter press

Kwerk Practice Blog

The Kwerk team blogs from the field here

Partnership at the highest level.