Plumbing Regulations and Systems Quiz

The Water Supply (Water Fittings) Regulations 1999:

• lay down regulations which cover all systems fed from the water undertaker's supply only

• lay down regulations covering all systems fed from private water supplies only

• do not cover the installation of water fittings external to the building e.g. hose union taps

• are not legal requirements, but a guide to good practice in undertaking plumbing work.

The recommended minimum diameter for gravity circulation pipework, between the boiler and hot water storage cylinder in a direct hot water system, is:

• 15 mm

• 22 mm

• 28 mm

• 35 mm.

The minimum capacity recommended by British Standard 6700 for a cold water storage cistern, that is feeding all outlets in a dwelling (both hot and cold) is:

• 200 litres

• 380 litres

• 400 litres

• 450 litres.

Which one of the following situations should be reported to the Water Supplier?

• An incorrectly sized cold water storage cistern in an older type Victorian premise.

• The proposed installation of a conventional indirect hot water storage system.

• Any deficiency in water supply between the main and the water supplier's stop valve.

• The proposed installation of a shower fed from a storage cistern in the loft.

In a single feed indirect hot water storage cylinder, the water in the primary circuit is prevented from mixing with the water in the secondary circuit by means of:

• a device in the storage cylinder which creates an air lock

• a copper coil within the storage cylinder

• an annular cylinder within the storage cylinder

• a non-return valve on the primary circulation pipework.

What type of service valve is usually fitted to the cold feed pipe to a hot water storage cylinder?

• Spherical plug valve.

• Full way gate valve.

• Supply stop valve.

• Non-return valve.

Refer to Figure 1. Which one of the following system components is indicated by the British Standard symbol shown?

• Float valve.

• Hot water cylinder.

• Circulating pump.

• Pipe reduction.

Which one of the following plastic pipe materials is usually used for domestic hot and cold supply and distribution water pipework?

• Acrylonitrile Butadiene Styrene (ABS).

• Polybutylene.

• Unplasticised polyvinyl chloride (PVC – U).

• Polypropylene copolymer (PP).

Which one of the lists shown in the table in Figure 2 shows materials suitable for hot distribution pipework?

• List 1.

• List 2.

• List 3.

• List 4.

Where separate Cold Water storage, feed and expansion cisterns are installed in an indirect system of hot water supply in a dwelling

• each cistern should have its own totally separate warning pipe

• the warning pipe from the cold water storage cistern may discharge into the feed and expansion cistern

• the warning pipe from the feed and expansion cistern may discharge into the cold water storage cistern

• the two warning pipes may be joined outside the building.