Used to reduce limescale formation and other metal-ion contaminants such as lead. It takes the form of tiny granules that work by replacing the mineral or contaminant ions with hydrogen ions

Used to reduce taste and odour such as chlorine. The carbon filter has a large surface area that attracts and absorbs organic substances from the water. The carbon is usually in powder, granular or block form

A cold water system were all the outlets are from the mains is know as?

A cold water system were most of the outlets are from a cold water cistern is know as?

On a indirect system, what outlet MUST be directly of the mains?

The min size for a water main is?

Due to a greater demand on the cistern, as compared to a direct system, the indirect storage system requires a cold water storage cistern for cold only with a minimum capacity of?

Fluid category 1 represents:

Which one of the following back flow

prevention devices must be

installed on a supply to a hose union bib tap, according to the Water Regulations?

The Water Regulations state that a mixer tap which allows the hot and cold water to mix in the body of the tap with unbalanced pressures must have:

.

If a hand basin has submerged

taps, which one of the following back flow prevention devices does the

Water Regulations say must be

installed?

What air gap is required for a wash hand basin

A double check valve is used to protect category 1 water (wholesome water) from what other category of water

What one of these is classed as category 4 water

The water regulations state that a mixer tap that allows the hot and cold water to mix in the body of the tap with unbalanced pressures must have

Due to a greater demand on the cistern, as compared to a direct system, the indirect storage system requires a cold water storage cistern for Hot and cold with a minimum capacity of?