Stainless steel over flow grates can have long term corrosion issues
Stainless steel grilles corroded on this award winner and had to be changed after 10 years

Deck level grates

Stainless steel grates need to be resistant to chlorine and only the best quality stainless will do. Even top grades of stainless steel can suffer corrosion if water quality in the pool is allowed to deteriorate.

Plastic grating offers one of the more durable and free-flowing covers to the over flow channel, but of course plastic is not to everyone’s taste and may be completely out of the question on a beautifully tiled pool with sumptuous natural stone flooring.

Aqualia’s design experts work with enthusiastic and knowledgeable stone specialists to ensure that their products are perfect for your needs as well as resisting problematic water overflows onto the surround tiling.

Deck level indoors, overflow outdoors and a rising wall and descending window keep the elements and intruders out and the heat in

Infinity edges

Infinity edge pools are often confused with Deck Level pools. With an infinity edge there is normally one wall over which the water from the pool spills. The infinity edge allows the swimmer the impression that the overflowing edge of the pool is merging with the horizon.

Where the horizon is in fact the sea then this effect is at its best giving the impression that the pool extends out into the ocean. Infinity pools look stunning and again create a powerful skimming effect. They may need a balance tank also, but some rely upon a deep trough into which the overflowing water drops.

A rare design with deck level internal pool linked to a free board external pool
An unusual design with an indoor deck pool level linked to a freeboard outdoor pool at Ockendon Manor

Combining styles

Aqualia’s engineers like nothing more than a challenge and the combined deck level indoor pool linked to an oudoor freeboard pool at Ockenden Manor in Cuckfield provided a scenario we hadn’t previously seen.

We designed the entire leisure suit including indoor and outdoor overflow spas, all controls and installed all mechanical and electrical systems.

More details of recent works can often be found on our facebook page

infinity pool with stone grates
Custom made Portuguese Limestone gratings designed to minimise water “creep” onto the main surround.

Deck level, what’s in a name?

Deck level or infinity swimming pools are so called because the level of water is same as the level of surrounding pool deck. In some modern residential and most commercial pools, the skimmers are frequently replaced by an overflow channel into which water overflows constantly into a “balance tank”, from where it is pumped into the circulation system.

Filtration designers favour this system because the entire perimeter becomes effectively a water skimmer, giving perfect debris removal at the surface. Interior designers prefer it too due to the flat water surface and “pure” reflections from the room.

Single slot overflow grates can have cleaning problems
Single slot drain channels can look “clean” but access to clean out the trough underneath can be tricky.

Where does the displacement go?

Our engineers will assess the design of your pool in respect of water over flow from the pool in the static and the actively used modes. The water channels need to be able to handle large volumes of water during active swimming and this needs to be displaced into the channels with minimal over-spill onto the surrounding deck area.

The balance tank needs to be adequately sized to capture and retain the displaced water and the balance tank will need a system of level controls and high and low alarms to warn if the tank is over filled or empty.

Typical budget plastic grates are practical and save costs
Plastic grilles are normally hard wearing and cost effective

Controlling levels

Aqualias’ engineers can use their significant experience to deal with these issues, and our in house controls knowledge to design the level control and alarm systems. Aqualia offer their exception controls for levels and all pool related functions too ↓

The grating material needs to have gaps that are wide enough to be free-flowing, but narrow enough that they do not create a trap for small fingers and toes. The grating material needs to be durable against flowing water and many natural stones are unsuitable because of this.