Module 9 Emergency Isolation Controls and Valves

Question 1

Which module covers Emergency Isolation Controls and Valves

Answer 1

Module 9

Question 2

Name the main standards and regulations covering Emergency Isolation Controls and Valves

Answer 2

a) Regulation 9
b) BS6400: Part 1

Question 3

Emergency Controls – what type of washer is used to ensure that the valve stops in the fully on or fully off positions?

Answer 3

A niting valve

Question 4

Looking at the attached diagram name three key points about this ECV

Answer 4

Question 5

Three key points when locating an ECV

Answer 5

1) Situated as near as practical to where the supply enters the house
2) Readily accessible
3) Enough space to allow the lever to fall to the off position

Question 6

Name three situations here additional ECVs are required

Answer 6

1) Gas meter installed >6m from property
2) Gas supply exits one building and enters another + more than one responsible persons
3) Number of flats in a building

Question 7

What do you do with an ECV on an unused installation?

Answer 7

1) Control off and lock screw tightened
2) Split pin and key removed
3) Outlet capped
4) Wire seal between cap and locking screw

Question 8

Defective ECV – what do you do?

Answer 8

Phone ESP

Question 9

Name three places you can locate a meter?

Answer 9

1) Approved external boxes
2) In garage or outbuilding
3) Inside house

Question 10

External meter installations must contain escaped gases – true or false?

Question 11

External built in meter box – where should it be located?

Answer 11

Within 2 meters of gas main
500mm to 1000mm above DPC

Question 12

External built in meter box – where should the ECV be located?

Answer 12

Front left hand corner of the box

Question 13

Location of meters in attached garages – where?

Answer 13

High level, away from doors and windows.

Question 14

House entry tees were used on installations

a) In the last 20 years
b) More than 20 years ago

Answer 14

a) In the last 20 years

Question 15

Under regulation 9 who is responsible for providing a properly sited meter and ECV?

a) Responsible person
b) Gas engineer
c) ESP
d) Any of the above

Answer 15

c) ESP

Question 16

In a block of flats with secondary meters does each of them need an AECV?

Answer 16

Yes – Regulation 9

Question 17

If the ECV is not located with the meter what additional labelling does it require?

Answer 17

Gas Emergency Control + consumer actions in event of an escape + ESP details

Question 18

Does regulation 9 apply to refillable gas cylinders?

Answer 18

One – no
Two or more with auto changeover device – yes

Question 19

Can a house entry tee be used as an ECV by the customer or gas engineer?

Answer 19

No

Question 20

If you have an outside meter where should the equipotential bonding be connected?

Answer 20

BS7671 requirement is that services should be Main Bonded within 600mm of entering the property so ignore the outside box and ground the * as soon as it comes through the wall.

of in detail..

544.1.2 - The main equipotential bonding connection to any gas, water or other service shall be made as near as practicable to the point of entry of that service into the premises, Where there is an insulating section or insert at that point, or there is a meter, the connection shall be made to the consumer’s hard metal pipework and before any branch pipework. Where practicable the connection shall be made within 600mm of the meter outlet or at the union point of entry to the building if the meter is external”