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Coliwasa


Wheaton coliwasa samplers for EPA sampling liquid waste streams


Available in PVC and glass, trumpet shape, pre-scored, and in both disposable and reusable forms. In stock and fast local delivery from PA.


Our large inventory ensures that you can find the exact type of coliwasa tubes you need without the hassle of browsing multiple distributor websites.


We are in Pennsylvania. Customers in the Northeast get your order from us in one day.



No need to repeat yourself when you shop with us. Your rep knows your requirements and preferences for your next order.


Find your coliwasa samplers below. Don't forget to register your organization's account with preferred pricing to maximize your budget.


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What is coliwasa?

A coliwasa sampler, which stands for Composite Liquid Waste Sampler, is a specialized tool designed for collecting representative samples of liquid waste from various containers, such as drums, tanks, and other large vessels. The primary purpose of a coliwasa sampler is to enable the collection of liquid samples that represent all layers of the liquid waste, ensuring a thorough and accurate analysis.


Why do you need coliwasa tubes to collect waste water samples?


Representative sampling: Designed to sample all liquid layers, from the top to the bottom, ensuring a comprehensive analysis.


Versatility: Suitable for a wide range of liquids, including hazardous and non-hazardous waste.


Ease of use: Simple design allows for straightforward operation, even in field conditions.


Durability: Constructed from robust materials to withstand harsh sampling environments.


Compliance: Helps meet environmental and regulatory standards for waste sampling and analysis.


SECO offers a range of coliwase samplers in PVC, glass, and trumpet glass, and in both disposable and reusable forms.


How to use a coliwasa sampler?

Here is our step-by-step guide to collect liquid samples with a coliwasa tube:

  1. Preparation: Ensure you have the appropriate personal protective equipment (PPE), like gloves.
  2. Insertion: Slowly insert the Coliwasa sampler into the liquid waste container, keeping the sampler in a vertical position.
  3. Filling: Allow the sampler to fill by lowering it to the bottom of the container. The liquid will rise in the tube as it is submerged.
  4. Sealing: Once the sampler is filled, seal it by closing the top valve or stopper, ensuring no liquid escapes.
  5. Extraction: Carefully withdraw the sampler from the container, maintaining the vertical position to prevent mixing of the sampled liquid.
  6. Transfer: Open the bottom valve or remove the bottom stopper to transfer the collected sample into a clean, labeled container for analysis.

Tips for ensuring accurate and representative sampling

  • Consistent speed: Insert and remove the sampler at a consistent speed to avoid disturbing the liquid layers.
  • Proper sealing: Ensure the top valve or stopper is securely closed before removing the sampler from the container.
  • Clean equipment: Always clean the sampler thoroughly between uses to avoid cross-contamination.
  • Record keeping: Document the sampling process, including the date, time, and conditions, to maintain traceability and compliance.

Don't forget to register your organization's account with preferred pricing to maximize your budget.


Can't find the equipment you need? Let us help!


Why do we recommend the Wheaton coliwasa sampler?

Product Highlight

The Wheaton coliwasa sampler from DWK is an industry standard for reliable and accurate sampling of liquid waste.


We've worked with DWK (in our opinion, the best and most reliable manufacturer of coliwasa samplers) for generations. So when you get yours from us, you get all the benefits of that uniquely long manufacturer-supplier relationship.

  • More responsiveness
  • Accurate lead times (if any at all)
  • Quality guarantees

The Wheaton coliwasa tubes are:

  • Made from durable materials that ensure long-lasting performance.
  • Designed to provide accurate and representative samples from various liquid waste containers.
  • Easy to operate, even in challenging field conditions.
  • Suitable for a wide range of liquid waste types and containers.

Coliwasa samplers for EPA 0010

Several industry standards and regulations that either recommend or require the use of Coliwasa samplers for obtaining representative samples of liquid waste. These standards are particularly relevant in environmental monitoring, waste management, and compliance with regulatory requirements.


EPA Method 0010: This method is used for sampling liquid waste streams to determine the presence of hazardous waste constituents. The Coliwasa sampler is specified for collecting representative samples from containers holding liquid waste.


EPA SW-846 Test Method 9095B (Paint Filter Liquids Test): While this method primarily determines the presence of free liquids in a waste sample, the Coliwasa sampler is recommended for collecting samples to ensure that the collected liquid represents the entire content of the container.


Choose the right coliwasa sampler for your application

We carry a range of coliwase samplers in PVC, glass, and trumpet glass, and in both disposable and reusable forms, with or without pre-scoring.


Different materials and features are important to accommodate specific sampling needs, balancing cost, efficiency, and accuracy to provide the best solutions for your applications.


Disposable coliwasa or reusable coliwasa

  • Disposable Coliwasa samplers are convenient for one-time use and eliminate the need for cleaning, reducing labor costs and the risk of cross-contamination.
  • Reusable samplers, while requiring an initial investment and cleaning, can be more cost-effective over time for routine sampling tasks.

Chemical compatibility
PVC is durable and resistant to corrosion, making it suitable for a wide range of liquids. Glass samplers provide chemical compatibility and transparency, allowing for visual inspection of the sample.


Pres-scored or trumpet design?

Pre-scored designs facilitate easy breakage at desired lengths, while trumpet designs are ideal for narrow openings or restricted access areas.


Representative sampling

  • Different materials and designs can affect the accuracy and representativeness of the sample. For instance, glass samplers are inert and do not react with the sample, ensuring chemical integrity.
  • Trumpet designs and pre-scored options can help in collecting precise volumes and avoiding sample contamination.

You need Coliwasa samplers to ensure accurate, safe, and efficient sampling of liquid waste. We recommend the Wheaton brand for its quality, precision, and user-friendly design, which help meet the stringent requirements of various industries.


Don't forget to register your organization's account with preferred pricing to maximize your budget.


Can't find the equipment you need? Let us help!