Filtration Support Gravel, 3-5mm nominal size suitable for industrial, aquaculture, recreational, pond and swimming pool water filters.

Pack size: 15kg

Gravel Size: 3-5mm

Description& Application:
A natural washed and closely graded support gravel suitable for industrial, aquaculture, recreational and swimming pool water filters.

Prior to ordering:
The volume of support media required will vary with make and capacity of filter, please check manufacturers recommendations.

Filtration for Non Filtration Specialists:
Pools, spas and ponds require water to be filtered (and as appropriate disinfected) to provide safe places for recreation and livestock. Poor maintenance can lead to clogged filters which can increase the risk of water borne infection.

Typically water filters contain clean closely graded silica sand often carried on a bed of filter support gravel. A pressure fed sand filter or "high rate" sand filter, which is generally located immediately after the pump will typically remove particles down to 10 microns in size (ten thousands of a millimetre).

Water is pumped under pressure into the top of the filter and leaves at the bottom. On the way through suspended dirt and debris in the water is trapped by the particles of sand.

Sand filters need to be cleaned regularly. By re-directing water back up through the sand bed and out to waste, accumulated dirt is flushed out, this is process is called back washing. Sand filters come with a valve known as a multiport valve to change the direction of water flow and to facilitate this process.

Sand media needs changing every three to five years, however, also be aware of a phenomena known as chanelling. This is where water cuts channels in the sand leading to a loss in filter efficiency an again will require the media to be replaced.

* Specialist Aggregates' Price Promise:
All prices shown include UK VAT and delivery to 90% of UK locations - Read More. - There are no hidden charges on checkout.

We export throughout Europe and Worldwide - please enquire for shipping rates.

Quick Contact:
WhatsApp your enquiry and images to 07484 022898

Rocks in a Box^™ For protection and security your product will be shipped in a weatherproof pack within our easy-to-handle double walled cardboard box.

Boxes are delivered by national couriers. Please advise during checkout or contact our office if you have specific delivery requirements or concerns.

Both the inner plastic pack and the outer box can be recycled via normal household or industrial/commercial collections.

Design Specify: 3-5mm Filter support gravel from Specialist Aggregates.

Product Code: 2640F

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