under ground drainage

Method statment

First we had to get are correct P.P.E (personal-protective-equipment) Gloves, Goggles. Steel toe cap boots, and overalls. When we got to the sight we had to find out what the problem was. We had to fix a leak from the sink waste. we started to reconnect all the pipes. we first started with the sink. we connect the pipe to the sink that comes out of the wall, and has a bend on it. right at the other side of the pipe and put a bung into it and twist it tight so the water doesn't escape from it. we amde sure that there was a fall on it so the water would not build up .Once we done that we then poured the some water in it to see if the bung was tight enough to not leak. after we made sure that the bung was not going to leak we then pourd 7 buckets of water in there to make sure that there were no leaks in the pipe work after we tested it we then tidyed the work area and made sure it was safe and that there were no water on the floor.

Tools

1 bucket
1 bin
blocks                                                  
shovel
mop
broom

Matrials

water
bung
piping
concrete blocks
bricks

Common defects

With having underground drains from the sink, You can get couple of problems. The main is where you get blockage, and the sink would start to clog.

Limitations

Drainage systems can prevent water accumulation that can lead to flooding by directing the water away from your home. Water that over-accumulates in your garden may kill plants.
 Drainage systems also prevent the accumulation of stagnant water, which can encourage mosquitoes to breed.

Risk assesment

With underground draiange, it can cause leaks on your floor. You can slip over it and have a injury.
Where the pipes are you can trip over them when they are getting completes.

When your cutting a pipe to make it smaller, you can cut your self where the pipe has been cut because it can be sharp.

Quates

110mm 0-90° Double Socket Adjustable Bend = £8.30
110mm Rectangular Hopper Spigot End = £5.45
110mm 3m Single Socket Pipe £5.40 x 3 = £16.20
110mm Double Socket Coupling each is = £1.30 x 9 = £11.70
Labour £30.00 per 1 hour. x 3 labours = £90.00
Petrol = £10.00

total cost = £141.65