FILTRATION / HEATING & CHILLED WATER
Side stream filtration
A focused filtration service for LTHW and CHW circuits. Discuss the system, the condition of the water and how filtration fits alongside cleaning, testing and dosing.
A clearer brief for a filtration requirement.
Side stream filtration is part of AP Environmental’s closed-system service range. An enquiry might follow test results, a maintenance recommendation or a project requirement. The right scope depends on the circuit, available connection points and the issue being addressed, so include existing information before selecting a solution.

What we can help with
- Side stream filtration service enquiries
- Scoping for heating and chilled-water circuits
- Coordination with chemical cleaning and flushing requirements
- Filtration discussed alongside testing and dosing
When to get in touch
When filtration is specified for a project or recommended for an existing circuit. If the system already has filtration, explain what is installed and the additional support you need.
Agreeing the scope
Clarify the filtration requirement, practical connection arrangements and any associated testing or treatment. Equipment selection, duration and visit requirements should be established as part of the quotation.
Helpful information to have ready
- The LTHW or CHW circuit involved and any water test results
- Existing filtration equipment and photographs
- Available connection points and plant-room access
- The reason filtration has been requested and the programme
You can enquire before you have every detail. Start with the information available and we can discuss what else is needed.
Your questions, answered.
Is filtration the same service as chemical cleaning?+
They are distinct services. Describe the requirement or recommendation you have received so filtration, cleaning and dosing can each be considered in the scope.
Can you discuss an existing filtration arrangement?+
Yes. Include the equipment details, circuit information and the support required so AP Environmental can review the enquiry.
What should I send if I only have a recommendation?+
Send the relevant wording, any associated results and basic site details. You do not need to choose equipment before starting the conversation.
CONNECTED SERVICES
Keep the next step in view.
Chemical cleaning, flushing & dosing
Chemical clean, flush and dose services for heating and chilled-water systems.
Explore this service ↗02 / TEST & DOSELTHW & CHW testing and dosing
Testing and chemical dosing for existing heating and chilled-water circuits.
Explore this service ↗03 / SAMPLINGLegionella sampling
Legionella sampling for building hot and cold water systems.
Explore this service ↗PLAN YOUR NEXT STEP
Let’s talk about your building.
Tell us the location, the service you need and your timescale.