Jointing

Question 1

What are the 4 main jointing principles for domestic plumbing and heating pipe work?

Answer 1

Capillary fittings( internal solder ring, ENDFEED)
Compression (Type A, Type B)
Push fit
Press fit

Question 2

Compression type A and type b ?

Answer 2

Type A- has an o-ring called an olive inside and back nut. It is non-manipulative
Type B- requires end of tube
Or flared with a swagging tool

Question 3

LCS colour grading

Answer 3

Light- brown
Medium-blue
Heavy- red

Question 4

Plastic pipe usage
What plastics are used for hot and colds and central heating services?

Answer 4

Plastic pressure pipe
( polyethylene, polybutylene)

Question 5

Plastics used for sanitation and drainage, rainwater systems?

Answer 5

-polyvinyl chloride
-ABS
-polypropylene

Question 6

Polyethylene(PE) is used for what?

Answer 6

MDPE is used for cold mains and gas supplies
Blue for cold
Yellow for gas

Question 7

Polybutylene is used for what

Answer 7

Used for normal pipe runs (very flexible)
Fiitings:
Hep20
Speed fit
Polyplumb