The water filters down through the sand water filter media, up through a riser tube in the centre of the composite pressure vessel and out through the sand filter control valve to service. Periodically, the sand filter will backwash, which changes the water flow through the sand filter. The water in the backwash cycle flows in from the inlet down the centre riser tube, up through the sand bed and out of the sand water filter control valve to drain.

The water filters down through the sand-anthracite filter media, up through a riser tube in the centre of the composite pressure vessel and out through the sand-anthracite filter control valve to service. Periodically, the sand-anthracite filter will backwash, which changes the water flow through the sand-anthracite filter. The water in the backwash cycle flows in from the inlet, down the centre riser tube, up through the sand and anthracite bed, and out of the control valve to drain.

The amount of sand required is approximately the diameter of the tank in inches x 10 ( 16" tank x 10 = 150 to 160 lbs of sand ).

Sand-like particles could be calcium (lime) deposits, water softener resin, or sand from a geologic formation. A small sample of the particles should be soaked in vinegar or a mild acid. If the particles dissolve when the acid is added, they are calcium deposits. Sand or water softener resin will not react to the acid. Water softener resin appears as symmetrical and shiny particles that feel greasy to the touch.

The fail-safe way of sizing any type of filter is to contact our technical team at Derwent Water Systems Limited who will be more than happy to advise you on sizing your carbon water filter.

The fail-safe way of sizing any type of water filter is to contact our technical team at Derwent Water Systems Limited who will be more than happy to advise you on sizing your carbon water filter. Please see our home page.

Yes, normally about every 5-7 years. The sand starts to cake from the outside of the tank inwards reducing the effective filter area. Commercial swimming pools often have the sand part changed several times a year and fully changed each year. These are often treated with sanitizers to kill off any bacteria growing inside which could spread to the pool and cause a health hazard. Check with the filter manufacturers instructions on their recommended method and media for your filter.

Yes. We offer single-day services or service contracts on all water treatment equipment. All our water treatment service engineers are fully qualified and experienced on the full spectrum of water treatment equipment available. Please see our service package facility on the home page.

The biggest problem with hot water is the sloughing off of chemicals/compounds which had been adsorbed. The heat causes the carbon pores to open up. which could result in lead or chemicals being released into the water. And, the carbon would not effectively reduce contaminants in the water. Hot water is usually under 212 degrees, and that isn't hot enough to alter the raw materials, so there wouldn't be any damage to the filter itself.

A sand-anthracite filter or dual media filter/multi-media filter is primarily used for the removal of turbidity and suspended solids as low as 10-20 microns. Inside a sand-anthracite filter is a layered bed of filter media. The bed is graded from bottom to top as follows: Having the filter media graded this way enables the sand anthracite filter to run for longer times before a backwash is necessary.

Under normal operating conditions, residential filters need the sand changed every 4 - 5 years. In areas with high air contaminants such as dust, leaves or any condition that requires frequent backwashing, the sand may need to be changed every 2 - 3 years.

Backwash filter when pressure on gauge reads 30 p.s.i.. or at least twice every month, whichever occurs first. Backwash Procedure (Sand Filter) After a minute or so, turn filter pump off, press down fully on backwash valve handle, rotate to "filter" and release handle CAUTION: A full measure of diatomaceous earth must be added at the completion of every backwash! Failure to do so mil result in filter damage.

Pour pH Increaser or Total Alkalinity Increaser to the ground where your backwash hose discharges to neutralize the acid.

Sand filters have a difficult time filtering out very small debris because often times the microscopic particles of dead algae and waste are smaller then the grains of sand themselves. A sand filter can also "channel," causing pockets in the filter where water passes through easily, without going through sand.

NO RO can not remove the sand iron in water, it required special pre-treatment for high sand iron contents. However, RO physically removes some amount of turbidity and physical impurities.

McBurney pools, we recommend the use of an sand filter. In fact, all of our above ground pools include a sand filter. Many filter cleaners cannot be used with cartridge filters, making their upkeep a bit more difficult. Replacements can be difficult to find and very expensive to buy. Filter sand can be expected to last three to five years with proper maintenance.

The Workplaces (Health, Safety and Welfare) Regulations 1992 (ISBN 0717604136) require your employer to provide an adequate supply.

Mechanical filters are made of fibers. Air is passed through a filtration media and the particles are trapped by: Interception - small particles move in the air-stream but are attracted to the fiber with a stronger force than carries the particle in the air stream. Diffusion – very small particles too small to follow streamlines will follow irregular paths because they are being hit by gas particles. (This irregular path is called the Brownian Movement.